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20钢柱壳外爆拉-剪切型断裂研究 被引量:3
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作者 郑柯 董新龙 《兵器材料科学与工程》 CAS CSCD 北大核心 2018年第3期61-64,共4页
研究20钢柱壳在较低爆炸载荷作用下的膨胀断裂特性,探讨拉伸断裂起始及拉-剪混合断裂机理。回收碎片宏观及微观分析结果显示:20钢柱壳在较低爆炸压力作用碎裂为拉剪-混合断裂,但与传统认为裂纹一般从柱壳外表面起始不同,断裂裂纹起始于... 研究20钢柱壳在较低爆炸载荷作用下的膨胀断裂特性,探讨拉伸断裂起始及拉-剪混合断裂机理。回收碎片宏观及微观分析结果显示:20钢柱壳在较低爆炸压力作用碎裂为拉剪-混合断裂,但与传统认为裂纹一般从柱壳外表面起始不同,断裂裂纹起始于柱壳壁厚内部,随膨胀变形发展向内、外表面扩展,形成拉-剪混合断裂。实验结果很好解释了许多金属柱壳爆炸实验中柱壳外表面出现裂纹的时间早于爆轰产物泄漏时间与动态有限元变形分析中外表面应力、应变始终处于较小状态之间的矛盾。 展开更多
关键词 柱壳 爆炸碎裂 拉剪断裂 微观分析 机理
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Simulation of Blast and Fragment Loading Using a Coupled Multi-Solver Approach 被引量:1
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作者 GERBER Bence COWLER Malcolm BIRNBAUM Naury 《Transactions of Tianjin University》 EI CAS 2006年第B09期182-187,共6页
Simulating blast and fragment loading simultaneously in a single computation requires the combined use of multiple states of the art solvers. A pipe bomb is an example of simple improvised explosive device (IED) tha... Simulating blast and fragment loading simultaneously in a single computation requires the combined use of multiple states of the art solvers. A pipe bomb is an example of simple improvised explosive device (IED) that consists of a piece of pipe filled with explosive material and capped at both ends. To simulate the explosion of a pipe bomb and the damage it causes, a coupled multisolver approach based upon finite element and finite volume methods is applied. The numerical calculation presented demonstrates the ability of ANSYS AUTODYN to correctly simulate the threats of IEDs and provides insight into how the most significant physical phenomena affect the results. 展开更多
关键词 finite element method finite volume method fluid/structure interaction blast impact FRAGMENTATION
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