Study on ballistic penetration resistance of titanium alloy TC4, Part II: Numerical analysis

查看全文 作　　者：Zhang [1]Tao;Chen [1]Wei;Guan [1]Yupu;Gao [1]Deping;Li [2]Shuguang

机构地区：[1]College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics;[2]Engineering Department, CITIC Offshore Helicopter Co., Ltd.

出　　处：《Chinese Journal of Aeronautics》索引2013年第26卷第3期,共8页

摘　　要：Enhancing containment capability and reducing weight are always great concerns in the design of casings. Ballistic tests can help to mitigate a catastrophic event after a blade out, yet taking time and costing money. A wise way is to hunt for a validated numerical simulation technology, through which the material dynamic behavior over the strain rate range in the ballistic tests should be represented and reasonable failure strain should be defined. The simulation results show that the validation of the numerical simulation technology based on the test data can accurately estimate the absorption energy, describe the physical process and failure mode during the penetration, as well as the failure mechanism. It is found that energy dissipation of projectiles is in manner of compression stage, energy conversion stage, and interactive scrap stage. An effect indicator is proposed, where the factors of critical velocity including impact orientation and mass of projectiles and thickness of casings are considered. The critical velocity presents a linear relation with the effect indicator, which implies the critical velocity obtained by the flat casing could underestimate the capability of the real casing. 关键词：弹道测试 TC4钛合金数值分析数值模拟技术阻力穿透临界速度灾难性事件

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Study on ballistic penetration resistance of titanium alloy TC4, Part II: Numerical analysis

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