| 强冲击载荷下Ti-Al3Ti 金属间化合物复合材料失效机理研究 |
| |
| 引用本文： | 范学领.强冲击载荷下Ti-Al3Ti 金属间化合物复合材料失效机理研究[J].稀有金属材料与工程,2018,47(9):2615-2620. |
| |
| 作者姓名： | 范学领 |
| |
| 作者单位： | 西安交通大学航天航空学院机械结构强度与振动国家重点实验室 |
| |
| 基金项目： | 国家自然科学基金项目（面上项目，重点项目，重大项目）,国家重点基础研究发展计划（973计划） |
| |
| 摘 要： | 本文数值研究了破片冲击载荷作用下Ti-Al3Ti 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-Al3Ti 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-Al3Ti 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Al3Ti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-Al3Ti 金属间化合物复合材料具有优异的动态吸能特性。
|
| 关 键 词： | 金属间化合物复合材料 有限元 高速冲击 失效 |
| 收稿时间： | 2017/2/24 0:00:00 |
| 修稿时间： | 2017/4/5 0:00:00 |
Failure mechanisms of Ti-Al3Ti metal-intermetallic laminate composites under high-speed impact |
| |
| Xueling Fan.Failure mechanisms of Ti-Al3Ti metal-intermetallic laminate composites under high-speed impact[J].Rare Metal Materials and Engineering,2018,47(9):2615-2620. |
| |
| Authors: | Xueling Fan |
| |
| Abstract: | In this work, 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 shown that Ti-Al3Ti metal-intermetallic laminate composites under high-speed impact was mostly under tensile stress, since the compressive wave was reflected back as a tensile wave. During projectile penetration, transverse, inclined, and vertical cracks formed in the Al3Ti phase, which can dramatically absorb the kinetic energy of projectile. |
| |
| Keywords: | metal-intermetallic laminate composites finite element method high-speed impact failure |
|
| 点击此处可从《稀有金属材料与工程》浏览原始摘要信息 |
|
点击此处可从《稀有金属材料与工程》下载全文 |
