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A cylindrical layered stainless steel fiber porous material and energy-absorbing composite pipe

A porous material, stainless steel technology, applied in the field of cylindrical layered stainless steel fiber porous material and energy-absorbing composite pipe, can solve the problems of complex weaving equipment and high cost

Active Publication Date: 2020-08-11
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pore structure of the stainless steel porous material obtained by this method is regular and controllable, but the weaving equipment is complicated, which leads to high cost of this method

Method used

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  • A cylindrical layered stainless steel fiber porous material and energy-absorbing composite pipe
  • A cylindrical layered stainless steel fiber porous material and energy-absorbing composite pipe
  • A cylindrical layered stainless steel fiber porous material and energy-absorbing composite pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The ultra-fine soft 304 stainless steel rope with a diameter of 0.5mm twisted by 49 stainless steel fibers is knitted with a 3.5mm diameter crochet needle and 10 stitches of lock stitches are used as starting stitches. Stir up the Satoyama and half needles of the needle, hang the thread on the needle, pull out the thread, hang the thread again, draw and pull through the 2 loops on the crochet needle, knit 1 short stitch, and repeat this process to finish the first row. Crochet 1 stitch with the standing stitch, turn the right end of the crochet fabric outward, insert the crochet needle into the 2 lock stitches of the header needle of the short needle at the right end of the first row, and then knit in the short needle. Repeat this to finish row 2. After that, each row is carried out according to the method of the second row, and a total of 16 rows are crocheted, woven into stainless steel wire rope woven sheets, rolled into round rods, placed in a quartz tube with an in...

Embodiment 2

[0059] Using the method of Example 1, 10 lock stitches are used as starting needles, and a total of 13 rows are crocheted to form a single-bundle continuous metal rope crochet sintered cylindrical layer with an outer diameter of about 23 mm, a height of about 50 mm, and a porosity of about 85%. porous material.

[0060] The axial quasi-static load-displacement curves of a single-bundle continuous metal rope hook-woven sintered cylindrical layered porous material with a porosity of about 85% in Example 2 include a short elastic phase, a long and stable energy-absorbing plastic platform phase and a dense compaction stage (see figure 1 ). The elastic stage transitions smoothly to the plastic platform stage, the initial crushing peak value is only 0.38KN, and the effective crushing length is 34.10mm (see figure 2 ), its effective stroke ratio is 0.62, and the total amount of effective absorbed energy is 18.69J (see image 3 ), the average crushing load is 0.55KN, and the load ...

Embodiment 3

[0062] Using the method of Example 1, 10 lock stitches are used as starting needles, and a total of 10 rows of crochet are used to form a cylindrical single-bundle continuous metal rope crochet sintered cylinder with an outer diameter of about 23 mm, a height of about 50 mm, and a porosity of 89%. shaped porous volume.

[0063] The axial quasi-static load-displacement curve of the single-bundle continuous metal rope hook-woven sintered cylindrical layered porous body material with a porosity of about 89% in Example 3 consists of a short elastic stage, a long and stable energy-absorbing plastic platform stage and a compact compaction stage (see figure 1 ). The elastic stage transitions smoothly to the plastic platform stage, the initial crushing peak value is only 0.32KN, and the effective crushing length is 33.46mm (see figure 2 ), its effective stroke ratio is 0.61, and the total amount of effective absorbed energy is 15.20J (see image 3 ), the average crushing load is 0...

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Abstract

The invention provides a cylindrically laminated stainless steel fiber porous material and an energy absorption compound pipe. The porous material is prepared from the method which comprises the following steps: crocheting a stainless steel base material to obtain a single-layered metal porous sheet, wherein the stainless steel base material is selected from a single-bundle continuous stainless steel fiber bundle, a single-bundle continuous soft stainless steel wire with the diameter of 0.2 to 1.0 mm or a single-bundle continuous ultrathin soft stainless steel rope with the diameter of 0.2 to0.8 mm; and winding and wrapping the single-layered metal porous sheet to be cylindrically laminated, carrying out vacuum sintering for 2 to 3.5 h at the temperature of 1100 to 1330 DEG C, and carrying out furnace cooling to obtain the cylindrically laminated stainless steel fiber porous material with the porosity of 60% to 90%. The stainless steel base material is crocheted and is wound and wrapped to be cylindrically laminated, and then vacuum sintering is carried out, so that the cylindrically laminated stainless steel fiber porous material with the porosity of 60% to 90% is obtained. The material is low in preparation method, and when a metal thin wall tube is filled with the metal, under the condition that the squashing peak value is hardly increased, the material has more stable energy absorption process and higher energy absorption capacity.

Description

technical field [0001] The invention relates to the application of metal fiber porous materials in the vicinity of buffering, energy absorption and anti-collision, in particular to a cylindrical layered stainless steel fiber porous material and an energy-absorbing composite pipe. Background technique [0002] Collision safety is an important indicator of the safety of various transportation vehicles. Therefore, innovative research on energy-absorbing materials and structures has become a hot spot in the field of collision safety. Energy-absorbing components filled with metal light-weight porous materials and metal thin-walled tubes are one of the directions. . Metal lightweight porous materials have low initial peak value, long and stable energy-absorbing plastic platform and high load efficiency. When combined with metal thin-walled tubes, it can not only enhance the deformation stability of metal thin-walled tubes, but also enhance Capacity, load efficiency, and can also ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B1/08B32B15/02B32B15/04B32B15/18B32B15/20F16F1/362F16F1/377
CPCB32B1/08B32B15/012B32B15/02B32B2262/103B32B2307/56F16F1/362F16F1/377
Inventor 吴菲肖小亭
Owner GUANGDONG UNIV OF TECH
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