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Surface nanotechnology locally-processed thin-wall energy absorption tube

A nanotechnology and energy-absorbing tube technology, applied in the field of thin-walled energy-absorbing tubes, can solve the problems that surface nanotechnology has not yet applied energy-absorbing structures and devices, and achieve the effects of low load uniformity coefficient, simple structure, and easy processing.

Active Publication Date: 2014-03-12
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This surface nanotechnology has not yet been applied to energy-absorbing structures and devices

Method used

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  • Surface nanotechnology locally-processed thin-wall energy absorption tube
  • Surface nanotechnology locally-processed thin-wall energy absorption tube
  • Surface nanotechnology locally-processed thin-wall energy absorption tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: The dimensions of a thin-walled energy-absorbing tube with a square cross-section are: the side length of the section is 40 mm, the tube length is 160 mm, the wall thickness is 0.5 mm, and the twin spacing of the surface nanometerization index is 35 nm. figure 1 A thin-walled energy-absorbing tube with a square cross-section that is locally treated with nanotechnology on the circumferentially equidistantly spaced strip-shaped surface. The lower end is fixed, and the upper end is axially punched by a 90kg mass block. "1" on the local surface of the thin-walled energy-absorbing tube indicates the nano-scaled area on the surface, and the four surfaces are treated with the same nano-scale, and the best 8 such strips are used on each surface, and the positions are the same, such as figure 1 shown. The size of the circumferential spacer strip is 40mm long and 10mm wide. Under the axial punching of the mass block at a speed of 6m / s, the thin-walled energy-absorbin...

Embodiment 2

[0031] Embodiment 2: The dimensions of a thin-walled energy-absorbing tube with a square cross section are: the side length of the section is 40 mm, the tube length is 160 mm, the wall thickness is 0.4 mm, and the twin spacing of the surface nanometerization index is 35 nm. image 3 (a) A thin-walled energy-absorbing tube with a square cross-section and locally treated with axially spaced strip-like surface nanotechnology. The lower end of the energy-absorbing tube is fixed, and the upper end is axially impacted by a mass block with a speed of 6m / s and a mass of 90kg. The layout of the nanoscale area on the surface of the thin-walled energy-absorbing tube is as follows: image 3 (b) and image 3 (c) shown. image 3 (b) is the layout of the nanoscaled area on the front and opposite surfaces; image 3 (c) is the layout of the nanoscale area on both sides of the surface. Dimensions of the strip-shaped surface nanoscale area: length 160mm, width 4.4mm. Such strips are 5 on th...

Embodiment 3

[0032] Embodiment 3: The dimensions of a thin-walled energy-absorbing tube with a square cross section are: the side length of the section is 40 mm, the tube length is 160 mm, and the wall thickness is 0.5 mm. Figure 7 (a) is a square cross-section thin-walled energy-absorbing tube with nano-scaled strip-like surface in segmented axial intervals. The upper section and the lower section are 60mm long, the surface nanometerized part has a twin spacing of 35nm, and the surface nanometerized strip size is 40mm long and 4.4mm wide. Such a strip front is 5 such as Figure 7 As shown in (b), there are 4 sides, such as Figure 7 (c), and uniform layout. The length of the transition section is 40mm, and the width of the two ring-shaped strip-shaped regions of the transition section is 2mm, and the twin spacing of the surface nanometerization part is 15nm. In the transition zone, the size of the surface nanoscale strips is 40 mm in length and 4.4 mm in width. There are 4 such strip...

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Abstract

The invention provides a surface nanotechnology locally-processed thin-wall energy absorption tube, and belongs to the technical field of automobile collision. The surface nanotechnology locally-processed thin-wall energy absorption tube is characterized in that surface local nanotechnology processing is performed on the structure of the thin-wall energy absorption tube, the design of interval strip-shaped or interval sheet-shaped nanocrystallization areas locally distributed in the axial direction and the annular direction and a layout design are adopted in the surface local nanotechnology processing, and a single local nanocrystallization surface shape design and a nanocrystallization degree design are further adopted in the surface local nanotechnology processing. The thin-wall energy absorption tube is divided into one to three sections and a transition section, and different surface nanocrystallization layout designs are adopted in the sections. The surface nanotechnology locally-processed thin-wall energy absorption tube has the advantages that through surface nanometer local process of the thin-wall energy absorption tube, a specific buckling mode and a specific development path of the thin-wall tube are induced, the effect that energy absorption is conducted at different sections when impact occurs is achieved, and the energy absorption effect of the thin-wall tube is improved. According to the design method of the thin-wall energy absorption tube, the structure of the energy absorption tube and the process of the energy absorption tube are made to be simple, the appearance of an original thin-wall tube is kept, and the thin-wall energy absorption tube further has the advantages of stability and controllability, and can be applied to automobile energy absorption structures, anti-collision safety equipment and other carrying vehicle energy absorption devices.

Description

technical field [0001] The invention belongs to the technical field of automobile collision, and relates to a thin-walled energy-absorbing tube treated with local surface nanotechnology. Background technique [0002] The impact problem is a common problem in transportation and construction engineering, and it has always been a very important issue to ensure the safety of personnel and key components in accidents. Reasonable energy absorption is one of the effective measures. The thin-walled structure has the advantages of being easy to absorb the energy upon impact, absorbing more energy and lowering the cost. Therefore, the thin-walled structure is the main energy-absorbing structure in widely used energy-absorbing devices. [0003] An ideal energy-absorbing tube should have high specific energy absorption rate, low load uniformity coefficient and stability conditions. However, the specific energy absorption rate and the load uniformity coefficient are numerically in a tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60R19/02
Inventor 徐新生李澄林志华洪卫芳孙家斌周震寰
Owner DALIAN UNIV OF TECH
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