43 results about "Total strength" patented technology

This invention provides a radial tire for aircraft comprising a belt composed of a plurality of belt layers, wherein a total strength of the belt T belt ¢N! in a circumferential direction over its full width satisfies T belt / WD 1.510 6 in which D ¢m! is an outer diameter of the tire and W ¢m! is a width of the tire, the belt is composed of at least two belt layers each containing organic fiber cords with an elongation in an extension direction under a load of 3.2 cN / dtex of 2.2-9.3%, a protection belt layer having a circumferential stiffness lower than that of the belt is disposed at an outside of the belt in a radial direction, a ratio of the circumferential stiffness of the protection belt layer to the circumferential stiffness of the belt is less than 0.5, and the protection belt layeris composed of organic fiber cords having a tensile strength at break of not less than 6.3 cN / dtex and a heat shrinkage factor of 0.5-5.0%, whereby a durability of a tread portion can be improved without damaging an excellent durability against foreign matters.

In the pneumatic radial tire of the present invention, a total strength K0 of a belt layer 20 in a circumferential direction of the tire per unit of width at a tire equator surface position P0 is set greater than a total strength of the belt layer 20 in the circumferential direction of the tire per unit of width at a width position P2 corresponding to ⅔ of a maximum width of the belt layer having the tire equator surface CL as a center.

The invention discloses a ceramic bond cubic boron nitride abrasive tool and a manufacturing method of the ceramic bond cubic boron nitride abrasive tool. The method comprises preparing materials and mixing, placing mixed materials in an electric furnace for melting, conducting water quenching to prepare ceramic bond blocks, conducting smashing, ball-milling, sieving and drying on the ceramic bond blocks to prepare ceramic bond powder, conducting surface oxidation modified pretreatment on cubic boron nitride (cBN) grains, evenly mixing the ceramic bond powder, the cubic boron nitride (cBN) grains and a pore-forming agent NH4HCO3, obtaining a mixture, adding temporary binding agent polyethylene glycol in the mixture, evenly mixing to obtain abrasive tool raw materials, placing the abrasive tool raw materials in a die, conducting pressing shaping on a pressure machine to prepare an abrasive tool green body, placing the abrasive tool green body in a sintering furnace for sinter molding, and preparing the ceramic bond cubic boron nitride abrasive tool along with cooling of the furnace. The ceramic bond cubic boron nitride abrasive tool improves total strength of the abrasive tool, enables the abrasive tool to be not easy to break in using process, improves using safety of the abrasive tool, and prolongs service life of the abrasive tool.

The invention relates to the field of a soft soil curing agent, and particularly provides a barium-containing sulphoaluminate soft soil curing agent and a preparation method thereof. The sulphoaluminate soft soil curing agent comprises components in percentage by weight as follows: (1), 50%-80% of sulfoaluminateclinker containing barium; (2), 25%-40% of calcined gypsum; (3), 10%-12% of lime; (4), 0.5%-2% of a water-retaining agent; and (5), 0.5%-5% of a retarder. The preparation technique process comprises the steps of calcinating natural gypsum, preparing ingredients, mixing and grinding. The soft soil curing agent has the characteristics of quick condensation, high strength and no shrinkage of curing soil volume, total strength can be formed after the curing for 1-3 days, and the soft soil curing agent is particularly suitable for quick maintenance and reinforcement of road foundations; and besides, under the same additive amount, the unconfined compressive strength of compacted soil adopting the soft soil curing agent is apparently higher than that of compacted soil adopting P.C 32.5 ordinary Portland cement, and the reinforcement effect is remarkable.

The invention discloses a dispersive polarized micropulse laser light radar control method and device, inputting polarized laser light emitted by a small-scale semiconductor pumping YAG frequency doubling polarizing laser as working into a beam expander for expanding, then sending the laser to the sky, where the laser is dispersed by aerosol in the atmosphere, the backward dispersed light of spherical particles in the aerosol will not change the polarizing direction of the laser light and that of nonspherical particles will change the polarizing direction of the laser light to form a component vertical to the polarizing direction of the original laser light (i.e. depolarized). The backward dispersive echo signals coming from the spherical and nonspherical particles are received by an optical telescope and two lights of different polarizing directions are separated by a light separating prism and sent to two detectors, respectively; a photon counter card makes contraposition counting and accumulation processing in the time sequence of photoelectric pulse signal returning from the space, and the processed result is stored into corresponding data memory cells; two signals collected are calculated by XJ-PMPL software to obtain echo depolarization degree, thus obtaining space distribution outline of nonspherical particles. Besides, it can also combine the two signals to obtain the total strength distribution of backward dispersed light, therefore the polarized micropulse laser light radar can also complete the functions of a general micropulse radar.

The invention discloses a method of preparing semi-conductor single-wall carbon nanometer tube by removing the metallic single-wall carbon nanometer tube in the single-wall carbon nanometer tube, the single-wall carbon nanometer tube is irradiated under a certain strength light so as to remove the metallic single-wall carbon nanometer tube, thereby obtaining the semi-conductor single-wall carbon nanometer tube, wherein total strength of the light that is irradiated on the surface of the carbon nanometer tube sample and has wave length range of 180nm-11um is 30mW per square centimeter to 300mW per square centimeter, compared with the prior art, the invention has the advantages of simple and controllable operation, environmental protection, good effect for removing metallic single-wall carbon nanometer tube, wide adaptability, low cost, and keeping the original look of carbon tube. The utility model has strong practicality and wide application prospect.