个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职:机械工程学院党委书记
其他任职:机械工程学院党委书记
性别:男
毕业院校:密歇根大学
学位:博士
所在单位:机械工程学院
学科:车辆工程
办公地点:综合实验二号楼(海涵楼)317B
电子邮箱:qichang@dlut.edu.cn
Ballistic Resistance of Honeycomb Sandwich Panels under In-Plane High-Velocity Impact
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论文类型:期刊论文
发表时间:2013-07-01
发表刊物:SCIENTIFIC WORLD JOURNAL
收录刊物:SCIE、PubMed、Scopus
卷号:2013
页面范围:892781
ISSN号:1537-744X
摘要:The dynamic responses of honeycomb sandwich panels (HSPs) subjected to in-plane projectile impact were studied by means of explicit nonlinear finite element simulations using LS-DYNA. The HSPs consisted of two identical aluminum alloy face-sheets and an aluminum honeycomb core featuring three types of unit cell configurations (regular, rectangular-shaped, and reentrant hexagons). The ballistic resistances of HSPs with the three core configurations were first analyzed. It was found that the HSP with the reentrant auxetic honeycomb core has the best ballistic resistance, due to the negative Poisson's ratio effect of the core. Parametric studies were then carried out to clarify the influences of both macroscopic (face-sheet and core thicknesses, core relative density) and mesoscopic (unit cell angle and size) parameters on the ballistic responses of the auxetic HSPs. Numerical results show that the perforation resistant capabilities of the auxetic HSPs increase as the values of the macroscopic parameters increase. However, the mesoscopic parameters show nonmonotonic effects on the panels' ballistic capacities. The empirical equations for projectile residual velocities were formulated in terms of impact velocity and the structural parameters. It was also found that the blunter projectiles result in higher ballistic limits of the auxetic HSPs.