摘要
以数值研究了破片冲击载荷作用下Ti-Al_3Ti金属间化合物复合材料的动力学行为及其失效机理。系统考察了强冲击载荷下,Ti-Al_3Ti金属间化合物复合材料的冲击性能、应力分布、失效行为及能量吸收机制。结果表明:在冲击载荷作用下,压缩波在复合材料间由于界面反射转变为拉伸波,导致Ti-Al_Ti金属间化合物复合材料主要处于拉应力状态。在破片贯穿金属间化合物复合材料的中间阶段,在Al_3Ti内形成横向裂纹、倾斜裂纹和垂直裂纹,这些破坏模式可有效地吸收冲击动能。因而,Ti-Al_3Ti金属间化合物复合材料具有优异的动态吸能特性。
The penetration process of Ti-Al3Ti metal-intermetallic laminate composites impacted by a projectile was numerically investigated.The ballistic performance,stress distribution,failure and energy absorbing mechanisms of Ti-Al3Ti metal-intermetallic laminate composites under high-speed impact were examined in detail.The results show that Ti-Al3Ti metal-intermetallic laminate composites under high-speed impact is mostly under tensile stress,since the compressive wave is reflected back as a tensile wave.During projectile penetration,transverse,inclined,and vertical cracks are formed in the Al3Ti phase,which can dramatically absorb the kinetic energy of projectile.
作者
范学领
原梅妮
秦强
Fan Xueling;Yuan Meini;Qin Qiang(State Key Laboratory for Strength and Vibration of Mechanical Structures,Xi＇an Jiaotong University,Xi＇an 710049,China;North University of China,Taiyuan 030051,China;Aircraft Strength Research Institute,Aviation Industry Corporation of China,Xi＇an 710065,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2018年第9期2615-2620,共6页
Rare Metal Materials and Engineering
基金
National Key Basic Research Development Program of China("973" Program)(2013CB035700)
National Natural Science Foundation of China(11472204,U1530259)
关键词
金属间化合物复合材料
有限元
高速冲击
失效
metal-intermetallic laminate composites
finite element method
high-speed impact
failure
