Scholarlink

<p>The mushrooming effect represents a critical bottleneck limiting the high-velocity penetration performance of long-rod projectiles. This phenomenon fundamentally stems from the complex coupling between material dynamic failure characteristics and the evolution of projectile nose morphology during penetration. However, existing studies have predominantly focused on static material properties such as density and strength, while the mechanism by which damage regulation governs nose evolution and consequently affects penetration efficiency remains poorly understood. In this study, a numerical model of 95W tungsten alloy long-rod projectiles vertically penetrating semi-infinite 603 steel targets was established using LS-DYNA and validated against experimental data. The influence of failure strain ranging from 0.1 to 3 on penetration behavior was systematically investigated. Results reveal that failure strain exerts a dual regulatory effect on penetration performance. Appropriately reducing failure strain can suppress plastic flow at the projectile nose and eliminate the "mushrooming" morphology. However, excessively low failure strain (&lt; 0.5) causes premature material failure, leading to a sharp increase in mass erosion rate. When these two competing mechanisms reach an optimal balance, the dimensionless penetration depth increases by 7.40%. Energy analysis further demonstrates that failure strain fundamentally reshapes the system’s energy distribution pattern. At moderate failure strain, the target internal energy accounts for the highest proportion of total energy, the crater diameter remains relatively small, and axial penetration efficiency is maximized. Based on these mechanistic insights, a layered gradient damage configuration was proposed. Simulation results show that the optimal two-layer and three-layer configurations enhance penetration depth by 11.6% and 9.23%, respectively. The above results validate the feasibility of improving long-rod projectile penetration performance through layered gradient damage design.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Penetration behavior and configuration design of long-rod projectiles under damage regulation

  • 期刊论文

  • 发表日期：

    2026年4月8日

查看全文
  • Li Shuangqi,
  • Wu Yiding,
  • Sun Xinyu,
  • Hu Bingzhuo,
  • Lu Wencheng,
  • Gao Guangfa

摘要

The mushrooming effect represents a critical bottleneck limiting the high-velocity penetration performance of long-rod projectiles. This phenomenon fundamentally stems from the complex coupling between material dynamic failure characteristics and the evolution of projectile nose morphology during penetration. However, existing studies have predominantly focused on static material properties such as density and strength, while the mechanism by which damage regulation governs nose evolution and consequently affects penetration efficiency remains poorly understood. In this study, a numerical model of 95W tungsten alloy long-rod projectiles vertically penetrating semi-infinite 603 steel targets was established using LS-DYNA and validated against experimental data. The influence of failure strain ranging from 0.1 to 3 on penetration behavior was systematically investigated. Results reveal that failure strain exerts a dual regulatory effect on penetration performance. Appropriately reducing failure strain can suppress plastic flow at the projectile nose and eliminate the "mushrooming" morphology. However, excessively low failure strain (< 0.5) causes premature material failure, leading to a sharp increase in mass erosion rate. When these two competing mechanisms reach an optimal balance, the dimensionless penetration depth increases by 7.40%. Energy analysis further demonstrates that failure strain fundamentally reshapes the system’s energy distribution pattern. At moderate failure strain, the target internal energy accounts for the highest proportion of total energy, the crater diameter remains relatively small, and axial penetration efficiency is maximized. Based on these mechanistic insights, a layered gradient damage configuration was proposed. Simulation results show that the optimal two-layer and three-layer configurations enhance penetration depth by 11.6% and 9.23%, respectively. The above results validate the feasibility of improving long-rod projectile penetration performance through layered gradient damage design.