预应力对陶瓷抗侵彻性能影响规律的数值模拟

吴雪; 张先锋; 丁力; 谈梦婷; 包阔; 陈贝贝

doi:10.11858/gywlxb.20170610

预应力对陶瓷抗侵彻性能影响规律的数值模拟

doi: 10.11858/gywlxb.20170610

南京理工大学机械工程学院, 江苏南京 210094

基金项目:

国家自然科学基金 11772159

中组部青年拔尖人才支持计划 2014

中央高校基本科研业务专项基金 30917011104

中央高校基本科研业务专项基金 30916011305

详细信息

作者简介:
吴雪(1991-), 女, 硕士研究生, 主要从事冲击动力学研究.E-mail:wuxue0911@163.com

通讯作者:
张先锋(1978-), 男, 博士, 教授, 主要从事高效毁伤与防护研究

中图分类号: O385
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出版历程
- 收稿日期: 2017-07-06
- 修回日期: 2017-07-20

Numerical Simulation of the Effect of Pre-stress on the Ballistic Performance of Ceramics

School of Mechanical Engineering, Nanjing University of Science & Technology, Nanjing 210094, China

摘要

摘要: 为研究预应力陶瓷的抗侵彻性能，利用AUTODYN仿真软件模拟了对SiC陶瓷施加预应力的过程，并开展了长杆弹以不同速度侵彻预应力陶瓷的数值仿真研究，确定了预应力陶瓷的抗侵彻性能。通过对比分析，得到了不同载荷下陶瓷内部的应力分布状态，以及陶瓷抗侵彻性能与预应力的关系。结果表明：对陶瓷施加预应力可以有效提高其抗侵彻能力；但随着加载预应力的进一步提高，即当陶瓷中心部位预应力大于112MPa时，陶瓷的抗侵彻能力反而下降，陶瓷加载的预应力与其抗侵彻性能之间存在最佳匹配关系。
- 陶瓷装甲 /
- 预应力陶瓷 /
- 抗侵彻性能
Abstract: In this work we studied the processes of applying pre-stress on SiC ceramics by using the finite element software AUTODYN.We established a model of long-rod projectile of different velocities penetrating ceramics with different pre-stress values to investigate the ballistic performance of the pre-stress ceramic, and obtained the stress distributions in the ceramic under different loading conditions through the comparison and analysis of the results, as well as the relation of different pre-stress and ballistic performance of the ceramic.The simulated results show that the appropriate pre-stress can improve the ballistic performance of ceramic, but the ballistic performance of ceramic is reduced when the pre-stress value is greater than 112 MPa, and that there exists a best matching relationship between the pre-stress value and the ballistic performance of the ceramics.
- ceramic armor /
- pre-stress ceramic /
- ballistic performance

HTML全文

图 1 陶瓷预应力加载模型

Figure 1. Applying pre-stress on ceramic

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图 2 长杆弹侵彻预应力陶瓷模型

Figure 2. Long-rod projectile penetrating ceramic

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图 3 陶瓷预应力加载过程

Figure 3. Pre-stress loading process of ceramic

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图 4 预应力加载过程中陶瓷内部应力云图

Figure 4. Stress in ceramic during pre-stress process

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图 5 陶瓷中心点应力-时间曲线

Figure 5. Stress-time curves of ceramic at the center point

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图 6 高斯点分布

Figure 6. Positions of Gaussian points

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图 7 陶瓷内部不同高斯点处应力分布

Figure 7. Stress curves at different Gaussian points inside the ceramic

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图 8 数值模拟与实验^[20]所得DOP对比

Figure 8. Comparison of DOP between simulation and experimental results^[20]

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图 9 侵彻过程中陶瓷内部应力分布云图

Figure 9. Stress cloud in ceramic during penetration process

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图 10 长杆弹头位移随时间变化曲线

Figure 10. Displacement variations of log-rod projectile over time

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图 11 DOP随速度、压缩比的变化

Figure 11. DOP vs. impact velocity and compression ratio

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