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Acta Armamentarii ›› 2023, Vol. 44 ›› Issue (5): 1321-1329.doi: 10.12382/bgxb.2022.0023

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Overload Characteristics of Rigid Projectile Impacting Honeycomb Structures at High Velocities

WEI Xin1, ZHANG Yunfeng1, ZHAO Qifeng1, SUI Yaguang1, ZHANG Dezhi1,*(), ZHANG Qiancheng2   

  1. 1 National Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi’an 710024, Shaanxi, China
    2 State Key Laboratory for Mechanical Structure Strength and Vibration, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China
  • Received:2022-04-11 Online:2022-07-09
  • Contact: ZHANG Dezhi

Abstract:

In order to evaluate the reliability of critical weapon components in high overload environments, a new technology of high overload environment simulation based on the rigid projectile impacting the honeycomb structure was proposed. The acceleration, velocity, displacement response characteristics and dynamic behaviors were studied with the light gas gun experiment. The difference of overload response time histories in the process of the projectile impacting the honeycomb structure under different high impact velocities was analyzed. The results showed that: crushing is a highly localized mechanical behavior, which firstly happened at the top of the honeycomb structure and then spread to the bottom as the projective moved; the compression process of the honeycomb structure subjected to projectile impact can be divided into three stages: initial impact, steady compression and compression to densification, which corresponds to the response characteristics of acceleration, velocity and displacement curves of the projectile; the velocity curve of initial impact stage showed an obvious ladder-shaped decline, resulting from the periodic traveling of stress waves in the projectile; all deceleration curves obtained from the three experiments had a similar peak at the initial stage of each experiment; the lasting time of the steady compression stage decreased with the increase of the initial velocity of the projectile, but the overload peak of the densification stage showed an opposite trend.

Key words: rigid projectile, honeycomb structure, overload characteristics, experiment