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Method for measuring collision resistance of honeycomb material at different impact speeds

A technology of honeycomb material and impact velocity, which is applied in the direction of analyzing material, strength characteristics, testing material strength by applying repeated force/pulsation force, etc., to achieve the effect of energy saving

Active Publication Date: 2020-02-28
SHAANXI UNIV OF SCI & TECH
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  • Application Information

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Problems solved by technology

Currently, there is no method to determine the crashworthiness of honeycomb materials at different impact velocities

Method used

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  • Method for measuring collision resistance of honeycomb material at different impact speeds
  • Method for measuring collision resistance of honeycomb material at different impact speeds
  • Method for measuring collision resistance of honeycomb material at different impact speeds

Examples

Experimental program
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Embodiment

[0118] Determination of a kind of circular aluminum (density 2700kg / m3) arranged regularly in multiple layers 3 ) Crashworthiness of honeycomb material under different impact velocities, the honeycomb radius of the circular aluminum honeycomb material is 3 mm, the wall thickness is 0.1 mm, and the hole depth is 10 mm. image 3 .

[0119] According to formula (5), we can get: v Q1 ≈15(m / s),

[0120] Using the drop hammer impact test machine, by adjusting the height and quality of the drop hammer, apply different loads with an impact velocity v of 3m / s to the honeycomb material, and obtain the impact force-displacement curve F-u, because vQ1 , so the deformation of the honeycomb material at the impact velocity is a quasi-static deformation mode. Standardize the impact force-displacement curve F-u to obtain its stress-strain curve and energy absorption efficiency-strain curve, Figure 4 Its stress-strain curve, Figure 5 For its energy absorption efficiency-strain curve, fr...

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Abstract

The invention discloses a method for measuring collision resistance of a honeycomb material at different impact speeds. The method comprises the steps that impact loads at different impact speeds areapplied to the honeycomb material; an impact-displacement curve is obtained and processed, a corresponding stress-strain curve and an energy absorption efficiency-strain curve are obtained, the optimal strain epsilonM of the honeycomb material at different impact speeds is obtained according to the stress-strain curve and the energy absorption efficiency-strain curve, and d the collision resistance of the honeycomb material at different impact speeds is determined. A user can conveniently select the honeycomb material with the required collision resistance, reasonable application of the honeycomb material is achieved, energy loss is reduced, and the honeycomb material is environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of performance testing of honeycomb materials, and relates to a method for measuring the crashworthiness of honeycomb materials under different impact velocities. Background technique [0002] Under impact loads at different speeds, the deformation modes of honeycomb materials are divided into three types, which are the quasi-static mode under low-speed impact, the transition state mode under medium-speed impact, and the dynamic mode under high-speed impact. Under different impact velocities, the stress-strain curves also have different characteristics. However, the stress-strain curve corresponding to each deformation mode has four stages: the linear elastic stage, the yield stage, the plateau region stage and the densification stage. In the linear elastic stage, the initial stress peak appears at the end of elastic deformation; after elastic deformation Entering the yield stage, the stress drops sharply t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/32
CPCG01N3/32G01N2203/001G01N2203/0075G01N2203/0218G01N2203/0676G01N2203/0682
Inventor 孙德强孙玉瑾李国志郝静李钟波安兴焦思涵
Owner SHAANXI UNIV OF SCI & TECH
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