118 results about "Plastic energy" patented technology

In one embodiment, an energy absorber, comprises: a plurality of crush lobes including a base and sides extending from the base to an outer wall; and a composite insert in the energy absorber. The insert comprises a second plastic material and reinforcement. The second plastic material is different than the crush lobe material. The insert is located at an area of the crush lobes, and wherein the area is the side and / or the outer wall. In another embodiment, an energy absorber comprises: a plastic frame; thermoplastic crush lobes extending from the frame, wherein the crush lobes comprise an outer wall, an extending wall, and a base; and a plastic insert located at an area having a volume of the crush lobes, wherein the insert occupies less than or equal to 90% of the area volume. The insert comprises reinforcement and a plastic material different than the thermoplastic crush lobes.

An energy-absorbing system includes a tube made of a continuous polymeric material. The tube has first and second tube sections connected by an intermediate tube section. By this arrangement, upon the bumper system receiving a longitudinal impact, the first and second tube sections telescopingly collapse with a predictable and consistent rolling collapse.

The invention provides an adjustable coupling beam joint seismic energy dissipating device and a seismic coupling beam joint. The energy dissipating device comprises acorbel bracket and an energy dissipating piece. The corbel bracket is used for being matched with and installed on a steel column of the coupling beam joint. The corbel bracket comprises a plurality of inserting slots which are parallel to the steel column and formed at intervals. The energy dissipating part comprises a plurality of energy dissipating plates arranged side by side at intervalsand atop plate arranged at the top ends of the energy dissipating plates. The energy dissipating plates are correspondingly arranged in the inserting slots in a clamped mode. The lower part of each energy dissipating plate is inserted into the corresponding inserting slot. Each energy dissipating plate is provided with an enlarged energy dissipating part which is exposed to the exterior of the corresponding inserting slot. The top plate isused for being matched with and installed on the lower portion of a steel beam of the coupling beam joint. The time point of entering into a plastic energy dissipating state of the enlarged energy dissipating part is controlled by adjusting the slot width of the inserting slots. The adjustable coupling beam joint seismic energy dissipating device solves the problems that the energy dissipating performance of an existing seismic energy dissipating device is general, and repairing after the earthquake is difficult, and the performance and disassembly work of the energy dissipating device are further improved.

The invention relates to a multi-story high-rise assembled steel structure frame - eccentrically-braced system, belonging to the technical field of structure engineering. The multi-story high-rise assembled steel structure frame - eccentrically-braced system comprises assembled beams and slabs, assembled stand columns and section steel sway braces. The assembled beams and slabs in the system consist of slabs, column base joints and open-web steel beams with section steel web members. The open-web steel beams are connected with the column base joints. The slabs are supported on the open-web steel beams. The assembled stand columns comprise box columns and flanges. During construction, the assembled beams and slabs and the assembled stand columns can be spliced to form a frame structure, and the section steel sway braces are arranged on the basis of the steel frame to form energy-dissipating beam sections, so as to improve the lateral stiffness and the plastic energy dissipation capacity of the structure. All members of the structure system are prefabricated in factories and are rapidly assembled through bolts on the construction site to form the structure system. Concrete pouring and welding operation are avoided, the defects of long construction period, serious material wastage, great pollution during construction and the like existing the traditional buildings are overcome, and the factory integrated production of buildings can be realized.

The invention provides a constant-resistance large deformation anchor cable control method for soft rock tunnel surrounding rock large deformation disaster. Guniting sealing is carried out on a fracture surface timely after tunneling, contact time of surrounding rock and air is shortened, a steel bar net is rapidly laid and a constant-resistance large deformation anchor cable is installed, and thesurrounding rock is reinforced through high prestress of the anchor cable. Huge plasticity energy in the surrounding rock can be released in a large deformation mode, firstly, the huge plasticity energy acts the constant-resistance large deformation anchor cable, after the surrounding rock plasticity energy is released, energy acting on a supporting body can reduce gradually, at the moment, the constant-resistance large deformation anchor cable supporting body can be located in a constant-resistance coupling supporting state, steel arch supporting is combined, the supporting effect of ''couple hardness with softness'' is formed, the stability of tunnel surrounding rock is guaranteed, and the soft rock tunnel surrounding rock large deformation disaster is avoided.

The invention discloses a fabricated steel frame and steel plate shear wall structure replaceable after an earthquake. The fabricated steel frame and steel plate shear wall structure comprises frame steel columns, main steel beams, post-earthquake replaceable energy dissipating joints and post-earthquake replaceable embedded steel plates. Webs of column bodies of the frame steel columns are connected through first end plates. Second end plates of each main steel beam are fixedly arranged at the two ends of a corresponding beam body. Third end plates of each post-earthquake replaceable energy dissipating joint are fixedly arranged at the two ends of a corresponding beam section, and connected with the corresponding second end plate of the corresponding beam body and an inner flange of the corresponding column body through bolts correspondingly. The post-earthquake replaceable embedded steel plates are connected with the inner flanges of the corresponding column bodies and the corresponding beam bodies through bolts, and long grooves are formed in the portions, making contact with the corresponding post-earthquake replaceable energy dissipating joints, of the four corners of each post-earthquake replaceable embedded steel plate. Internal force can be effectively transmitted, and it is guaranteed that the structural integrity and stress performance are given to full play; and structural failure and a failure mechanism are actively controlled, it is guaranteed that a main body structure is kept in an elastic state, plastic energy dissipation and damage occur in designated local positions, post-earthquake replacement and repairing are facilitated, and economic loss is reduced.

The invention provides a phenolic modified polyurethane polyisocyanurate PIR energy-saving insulation board. The phenolic modified PIR energy-saving insulation board is of PIR battenboard structure or PIR bare board structure. A middle sandwich layer of the PIR battenboard structure is of phenolic modified PIR macromolecule structure. Both upper and lower panels of the middle sandwich layer are provided with metal or nonmetal sheets. The phenolic modified PIR energy-saving insulation board has the advantages that compared with a polyurethane modified hard polyisocyanurate PIR foam plastic energy-saving insulation board, the fireproof and high temperature resistance performances are improved; and compared with a phenolic resin foaming insulating material, the phenolic modified PIR energy-saving insulation board has excellent environmental-friendly performance, physical property and better thermal insulation performance.

The invention discloses a high-entropy quinary alloy with good high strength and high plasticity matching performance. The chemical formula of the high-entropy quinary alloy is AlaCobCrcFedNie (a-e are molar ratios), wherein 1>=a>=0.5, 1.2>=b>=0.7, 1>=c>=0.4, 1>=d>=0.4, and 2.2>=e>=0.8. Furthermore, a:e is 1:1.2-2.5. Furthermore, a is 0.8, b is 1, c is 0.6, d is 0.7, and e is 1.1-2.0. Furthermore,the chemical formula of the alloy is Al0.8CoCr0.6Fe0.7Ni1.1, Al0.8CoCr0.6Fe0.7Ni1.5, Al0.8CoCr0.6Fe0.7Ni1.8, or Al0.8CoCr0.6Fe0.7Ni2.0. The high-entropy quinary alloy has high strength and high plasticity, and the problem that the strength-plasticity matching performance of a high-entropy alloy in the prior art is poor is solved. The invention further provides a preparation method of the high-entropy quinary alloy with the good high strength and high plasticity matching performance. The preparation method is simple, safe and stable.

Disclosed is a seismic resistance, heat preservation and sound insulation integrated wall. According to the integrated wall, seismic resistance energy dissipation, heat preservation and sound insulation functions are integrated together; lateral resistance stiffness is provided for the structure, plastic energy dissipation is conducted, the additional damping ratio is provided, the response of the structure under an earthquake is reduced, the architecture function is also combined, and the heat preservation and sound insulation requirements of a wall body are met. Factory prefabricating and on-site assembly standardizing of the integrated wall are achieved, the delivery period is shortened, and the production efficiency is improved. The seismic resistance, heat preservation and sound insulation integrated wall comprises a seismic resistance energy dissipation element located at the center, out-of-surface restraining keels and external heat preservation and sound insulation structures. Upper and lower connecting pieces of a buckling-free corrugated steel plate energy dissipation wall body are used for connecting the buckling-free corrugated steel plate energy dissipation wall body with upper and lower frame beams through high-strength bolts, and thus the wall body structural functions of the buckling-free corrugated steel plate energy dissipation wall body are achieved. Meanwhile, according to the single wave number of the corrugated steel plate wall body, the multiple out-of-surface retraining keels with the shapes being matched with the shapes of wave crests or wave troughs are arranged outside the surface of corrugated steel plate wall body. The external heat preservation and sound insulation structures are fixed to the keels, and the transverse ends of the external heat preservation and sound insulation structures are fixed to edge members on the left and right sides of the buckling-free corrugated steel plate energy dissipation wall body through the keels.

The invention discloses a bearing and energy-dissipation difunctional corrugated steel plate wall. The bearing and energy-dissipation difunctional corrugated steel plate wall comprises a buckling-freecorrugated steel plate energy-dissipation wall located in the center and square steel pipe concrete column members located at the two sides, the buckling-free corrugated steel plate energy-dissipation wall is welded to the square steel pipe concrete column members at the left side and the right side, the upper ends and the lower ends of the square steel pipe concrete column members are welded tobase plates respectively, and the base plates are fixed to frame beams. The bearing and energy-dissipation difunctional corrugated steel plate wall is connected with a main body structure through bolts, the convenience and assembly degree of on-spot installation are improved, and the on-spot welding workload is reduced. The bearing and energy-dissipation difunctional corrugated steel plate wall integrates load bearing and earthquake-resistance energy dissipation, and the shear capacity and the stability of the structure can be improved; when the bearing and energy-dissipation difunctional corrugated steel plate wall is subjected to plastic energy dissipation, an additional damping ratio is provided, the response under a structure earthquake is reduced, the weight can also be borne, part ofupper vertical loads borne by the columns are shared, and the purpose that the wall has two functions is achieved.

The invention relates to a plastic seal pressing-in material for eliminating blast furnace gas blowby, which is characterized by being formed by combining plastic seal pressing-in material, long-term plastic sealant and high-strength fast hardening self-flow castable. The plastic seal pressing-in material can be pressed in larger furnace gaps at different blast furnace gas blowby positions, and the material can keep certain plasticity at low temperature, effectively fill in the gaps to play a role in plugging a gas blowby channel, and automatically harden and keep the volume stable and unshrinking; a furnace foundation part is manufactured into a labyrinth seal structure, and a gas exposed channel is plugged by using the long-term plastic sealant; the high-strength fast hardening self-flow castable is cast outside a long-term plastic seal material to level so that a seal solidifying role is played; and the three materials are combined for application so that multi-plugging for the gasblowby channel is formed, the gas blowby channel is effectively plugged, a new blowby channel is not easy to form, and therefore, the aim of fundamentally solving the problem of the blast furnace gasblowby is achieved.

The invention provides a high-strength-plasticity antibacterial high-entropy alloy and a preparation method thereof. The expression of the high-strength-plasticity antibacterial high-entropy alloy isAl<x>CoCrCu<y>FeNi, wherein x is greater than or equal to 0 and less than or equal to 0.5, y is greater than or equal to 0.1 and less than or equal to 1.2, and the ratio of the elements is the molar ratio. The preparation method comprises the steps of adjusting a vacuum arc furnace to an anaerobic atmosphere, adding Al, Co, Cr, Cu, Fe and Ni in sequence, controlling the vacuum degree in the furnace, introducing argon at specific air pressure, and conducting smelting and casting to obtain the high-strength-plasticity antibacterial high-entropy alloy. The antibacterial high-entropy alloy prepared through the method has the broad-spectrum antibacterial performance, also has the high strength and plasticity and can meet the special requirements in some severe environments.

The invention discloses an earthquake damage assessment method for a short-leg shear wall structure. A computing model is built by adopting finite element software, wherein a wall body and floor slabs adopt shell units; coupling beams and secondary beams adopt beam units; steel bars are defined as layers to be embedded in members; and an autooscillation circular frequency of the structure is calculated. Damage distribution of the short-leg shear wall structure under translational resonance excitation is calculated by adopting a concrete plastic damage constitutive model; a state of damage of cross sections of all wall legs is obtained by continuously adding excitation amplitude; a basic destruction form is obtained; and at the moment, corresponding plastic energy consumption is limited plastic energy consumption of the structure. An earthquake wave is subjected to wavelet packet decomposition to form sub-waves taking the autooscillation frequency of the structure as a center; and plastic energy consumption demands of the sub-waves are calculated. Structure safety is judged; a safe structure is judged; and an overall damage index of the structure is calculated; and a damage level is judged. The method has the beneficial effect that the overall damage level of the short-leg shear wall structure under the action of an earthquake can be accurately and reliably estimated or assessed.

The invention provides a double-aluminum-alloy-plate assembly type buckling restrained brace. Core plates are fixed to the two sides of a steel i-beam through bolts by using upper channel steel, lowerchannel steel and middle channel steel; large overall bending rigidity of the brace can be provided, the requirement for the constraint ratio is easily met, the brace can quickly enter the plastic energy dissipation state when bearing a reciprocating load, and earthquake energy can be dissipated to a larger extent; the core plates are made of aluminum alloy so that the dead weight of the structure can be reduced to a certain extent. The structure is in an assembly type and is convenient to detach, damaged parts can be conveniently replaced after earthquakes, and economic benefits and the social benefits are outstanding.

The invention provides an aluminum-coated plastic energy-saving fire-resistant window. Square steel is fixedly installed in a PVC section chamber. A structural aluminum section is fixed on a PVC section and the square steel. The internal of the PVC section chamber and the external surface of the PVC section are bonded with refractory materials. After the assembly of the PVC section and the structural aluminum section is completed, an L-shaped glass support plate is installed on the PVC section, a lap of refractory materials is pasted in the same position of the PVC section, with the refractory materials covering the L-shaped glass support plate, then glass is put in, and a T-shaped protection component is installed. The invention also provides the fire protection method of the aluminum-coated plastic energy-saving fire-resistant window. The aluminum-coated plastic energy-saving fire-resistant window is tested according to the GB / T12513-2006 standard, and the time of fire-resistant integrity obtained is 60 min. Both the PVC section chamber and the surface of the PVC section are bonded with the refractory materials which can expand at high temperature to fully support softened PVC. The four corners of a window frame are connected by metal screw connectors, breaking the welding barrier of plastic steel window corners.

The invention provides room-temperature high-plasticity wrought magnesium alloy and a preparation method thereof. The magnesium alloy comprises the following components by weight percent: 5.5wt%-7.3wt% of Al, 0.40wt%-1.50wt% of Zn, 0.15wt%-0.50wt% of Mn, 0.05wt%-1.0wt% of P and the balance being Mg and inevitable impurities, wherein the inevitable impurities comprise the following components: not more than 0.05wt% of Si, not more than 0.004wt% of Fe, not more than 0.004wt% of Cu and not more than 0.002wt% of Ni. According to the magnesium alloy, a nonmetal element P is added in an existing magnesium alloy smelting process, a stable small grain structure is obtained under the action of the nonmetal element P, the room-temperature plasticity is improved, and the room-temperature processing and using requirements of finished products or semi-finished products can be met.

The invention relates to a buckling restrained brace. The buckling restrained brace comprises end part restrained sections, buckling sections and a sleeving pipe, the end part restrained sections arelocated atthe two ends of the buckling sections and play a load conveying role, one sides of the end part restrained sections are connected with the buckling sections, and the other sides of the end part restrained sections are used for connecting to a beamcomponent, a column component or a joint; the sleeving pipe is fixed to the outer sides of the buckling sections by grouting and filling concrete, and a layer of an unbonded material is between the concrete and the outer sides of the buckling sections; and buckling sections play a role of dissipating energy and the material of the buckling sections is alloy steel, the micro organization structure of the alloy steel is composed of a meta-stable stateaustenite and thermal-inducedepsilon martensite with the volume fraction less than 10%, and entering into a yield phase, and the micro organiztion of the alloy steel is subjected to reversible transition between the austenite and stress / strain-induced epsilon martensite under theactionof stretch-compression alternate loading. The buckling restrained brace can possess larger buckling bearing force and accumulated plastic energy dissipating effect, and can significantly improve the anti-seismic property of a building and realize light weight of the buckling restrained brace.

The invention provides a Zr-Sn-Nb-Hf alloy bar. The Zr-Sn-Nb-Hf alloy bar comprises the following components in percentage by mass: 0.8%-1.2% of Sn, 0.2%-0.4% of Nb, 0.8%-1.6% of Hf and the balance of Zr and inevitable impurities. The invention further provides a method for manufacturing the Zr-Sn-Nb-Hf alloy bar. The method comprises the following steps: 1, a Sn-Nb-Hf intermediate alloy is manufactured through vacuum non-consumable arc melting; 2, the Sn-Nb-Hf intermediate alloy is broken and is uniformly mixed with sponge Zr, and then the mixture is compacted into an electrode; 3, an ingot casting is obtained through vacuum consumable arc melting; 4, a semi-product bar blank is obtained through hot extrusion; and 5, the Zr-Sn-Nb-Hf alloy bar is obtained through hot extrusion. The Zr-Sn-Nb-Hf alloy bar has excellent room-temperature and high-temperature strength and good plasticity, and can be used as a structure material under a next-generation high-burnup condition.

An energy-absorbing system includes a tube made of a continuous polymeric material.The tube has first and second tube sections connected by an intermediate tubesection. By this arrangement, upon the bumper system receiving a longitudinalimpact, the first and second tube sections telescopingly collapse with a predictableand consistent rolling collapse.

The invention relates to a wire rod for a pipeline steel gas shield welding wire and a manufacturing method of the wire rod, the wire rod comprises the following elemental components in percentage by mass: 0.06-0.09% of C, 0.55-0.80% of Si, 1.45-1.60% of Mn, 0.008-0.015% of S, 0.85-0.95% of Ni, 0.060-0.085% of Ti, 30-70ppm of O and the balance of Fe and inevitable impurity elements, and the impurity elements comprise less than or equal to 0.003% of P, less than or equal to 0.002% of Sb, less than or equal to 0.002% of Sn and less than or equal to 0.003% of As. The microstructure of the wire rod is ferrite and pearlite, TiO2 inclusions distributed in a dispersed mode exist in the microstructure, the size of the TiO2 inclusions is stably smaller than 5 micrometers, and the number of the inclusions in unit area is stably larger than 35 / mm < 2 >. The tensile strength of the wire rod is stable to be smaller than or equal to 700 MPa, the area reduction is larger than or equal to 65%, good plasticity is achieved, and direct drawing operation with the area reduction rate reaching 95% or above can be carried out. The manufacturing method comprises the steps of molten iron pretreatment, molten steel primary smelting, LF refining, square billet continuous casting, square billet heating and rolling and wire rod cooling.

The invention belongs to the field of heterogeneous materials, and particularly relates to a high-strength and high-plasticity layered heterogeneous magnesium-lithium composite material and a preparation method thereof. The preparation method comprises the following steps: (1) pretreating single-phase magnesium-lithium alloy plates and double-phase magnesium-lithium alloy plates which are greatly different in strength and plasticity, and stacking the single-phase magnesium-lithium alloy plate and the double-phase magnesium-lithium alloy plate according to a high-strength and low-plasticity / low-strength and high-plasticity / high-strength and low-plasticity mode; (2) after the stacked plates are subjected to high-temperature heat preservation, conducting rolling; and (3) after the plates obtained in the step (2) are subjected to surface treatment, the step (2) is repeated. Magnesium-lithium alloys greatly different in strength and plasticity are tightly combined together through accumulative rolling, a layered heterogeneous structure is formed at the same time, the strengthening effect induced by heterogeneous deformation can be generated due to the strength and plasticity differences existing between different areas during deformation, and therefore the strength and plasticity of the material are improved at the same time.

The invention discloses an eccentric support frame system easy to repair. The eccentric support frame easy to repair comprises frame columns, a non-energy-dissipation frame beam section, supports and energy-dissipation frame beam sections, wherein each energy-dissipation frame beam section comprises an elastic beam portion and an energy-dissipation portion, each elastic beam portion comprises beam flanges and a residue web obtained after an integral beam web is removed, and each energy-dissipation portion is mounted at the empty position obtained after the corresponding beam web is moved and comprises an energy-dissipation plate, a connection plate and a connection rib. The eccentric support frame system easy to repair has the advantages that under a function of strong shock, the energy-dissipation portions of the energy-dissipation frame beam sections can perform plastic energy dissipation firstly due to reasonable design, the elastic beam portions of the energy-dissipation frame beam sections are always kept within an elastic range, the energy-dissipation portions can be replaced conveniently and quickly after shock since the energy-dissipation portions are connected with the elastic beam portions via bolts, repairing of the elastic beam portions is not need, the difficulty in repairing the eccentric support frame system after shocking is lowered remarkably, and quick repairing of the current eccentric support frame system is achieved.

The invention discloses a function-restorable soft steel damper. The function-restorable soft steel damper comprises a web, a structural anchor plate, flange plates and an energy dissipation component, wherein the end faces of both sides of the web are fixedly connected with the flange plates respectively; the upper and lower end faces of the web are fixedly connected with the structural anchor plate respectively; the web is a residual web formed by removing a portion from a complete web; the energy dissipation component is arranged at a vacated position on which the web is removed; the two ends of the energy dissipation component along the height direction of the soft steel damper are fixedly connected with the web respectively. An energy dissipation plate of the energy dissipation component enters plastic energy dissipation through reasonable design under the action of strong vibration, the web, the structural anchor plate and the flange plates always keep within an elastic range, and the energy dissipation component is fixedly connected with the web through a bolt, thereby realizing convenient and rapid replacement of the energy dissipation component after vibration, avoiding repairing other components of the soft steel damper, remarkably lowering the difficulty in replacing the entire soft steel damper after vibration, and realizing rapid recovery of the use functions of the current structure and member.

The invention discloses a drilling parameter optimization method based on a plastic energy dissipation ratio. The method comprises the following steps that: S1: according to the mechanical models of plastic fracture and brittle fracture in a well drilling rock cutting process, independently establishing a mechanical specific work calculation model under the situations of the plastic fracture and the brittle fracture of rock; S2: utilizing the mechanical specific work calculation model under the situations of the plastic fracture and the brittle fracture of the rock, carrying out combination toobtain a mechanical specific work final calculation model; S3: on the basis of the mechanical specific work final calculation model, establishing a plastic energy dissipation ratio calculation model;S4: through a cutting test, obtaining parameters in the plastic energy dissipation ratio calculation model; S5: solving the plastic energy dissipation ratios under different cutting depths by the plastic energy dissipation ratio calculation model; and S6: comparing the plastic energy dissipation ratios under different cutting parameters, optimizing the optimal cutting parameter. By use of the method, the optimal cutting parameter can be optimized, and therefore, purposes that drilling efficiency is improved and well drilling cost is lowered are finally achieved.

The invention provides a double-roll thin-strip continuous casting fine crystal grain orientated silicon steel thin strip stock and a manufacturing method of the thin strip stock. The thin strip stock consists of the following ingredients in percentage by mass: 0.01 to 0.08 percent of C, 2.8 to 3.4 percent of Si, 0.05 to 0.30 percent of Mn, 0.015 to 0.04 percent of S, 0.005 to 0.05 percent of Als, 0.003 to 0.010 percent of N, 0.01 to 0.5 percent of Ti, 0 to 0.6 percent of Cu, 0 to 0.2 percent of Sn, at most 0.004 percent of O, at most 0.01 percent of P and the balance Fe, wherein the average crystal grain dimension is 20 to 45mm. The method comprises the following steps of (1) melting molten steel; (2) adopting a double-roll thin-strip continuous casting device, and casting molten steel into a cavity to form a melting bath, wherein the overheat degree of the upper surface of the melting pool is 10 to 70 DEG C, and the molten steel is guided out at a speed being 20 to 80m / min. The thin strip stock and the manufacturing method have the advantages that the manufacturing process is simple and effective; the fine crystal grain structure is favorable for improving the toughness and plastic performance of an orientated silicon steel plate, and is favorable for the subsequent texture regulation and control.

A viscous-plastic energy-dissipation damping support belongs to the technical field of energy dissipation and damping of a building structure and comprises a first pre-bending steel plate strip and a second pre-bending steel plate strip which are same in shape and are up-and-down wave-shaped along the length direction, the wave trough of the first pre-bending steel plate strip and the wave crest of the second pre-bending steel plate strip are connected with each other, sleeves are sheathed outside the first pre-bending steel plate strip and the second pre-bending steel plate strip along the length directions of the first pre-bending steel plate strip and the second pre-bending steel plate strip, support blocks are arranged between the sleeves and the pre-bending steel plate strips, and viscoelastic bodies are filled between the sleeves and the pre-bending steel plate strips and between the two pre-bending steel plate strips; when the support is stretched and compressed, the viscoelastic bodies deform to consume the earthquake energy of an input structure; when the support deforms greatly, the pre-bending steel plate strips yield, also can consume the earthquake energy and are symmetrical; and when the pre-bending steel plate strips are pressed, the lateral forces counteract, the demands on the rigidity of the sleeves are alleviated; and the support sufficiently utilizes the energy consumption capability of the viscoelastic bodies, thus being strong in energy consumption capability and having certain compression resistant rigidity.

The invention provides medium-strength high-plasticity titanium alloy. The medium-strength high-plasticity titanium alloy is prepared from, by mass, 11%-26% of Nb, 4%-11% of Mo+W, 0.08%-0.19% of O and the balance Ti and inevitable impurities, wherein Mo>=3%, and 0%<=W<=4%. After the titanium alloy is subjected to heat treatment, the room temperature tensile strength of the alloy is 600-800 MPa, the room temperature ductility is not smaller than 20%, the cold and heat machinability is excellent, and the titanium alloy has high plasticity under the normal temperature condition and the liquid hydrogen temperature condition and can meet the requirement for rivets and ultralow-temperature structural parts in the application fields such as the aviation field and the aerospace field.

The invention discloses a composite type energy absorbing device with a thin-wall metal tube filled based on a cut honeycomb structure. The problems that an energy absorbing device is single in energyabsorbing manner, and overrange impact load protection cannot be achieved can be solved. The device is composed of a wedge-shaped diameter expansion block with a parallel blade set, the thin-wall metal tube, the honeycomb structure and an air leakage protection chassis, an inner cavity of the thin-wall metal tube is coaxially filled with the honeycomb structure, the wedge-shaped diameter expanding block is coaxially and tangently placed on an upper port of the thin-wall metal tube, the air leakage protection chassis is coaxially welded to a lower port of the thin-wall metal tube, an air leakage groove of the chassis coincides with a blade face of the wedge-shaped diameter expanding block, when the wedge-shaped diameter expanding block bears conventional impact loads, the parallel blade set generates cutting energy absorbing on the honeycomb structure, the metal tube generates diameter expanding plastic energy absorbing, when the wedge-shaped diameter expanding block bears the overrange impact load, the honeycomb structure generates buckling plastic energy absorption, low-acceleration response and the overrange impact load protection of a vehicle during conventional collision can be achieved, the energy absorbing effect is good, and key parts can be repeatedly used.