| 钨合金三点弯曲破坏的细观数值模拟 |
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| 引用本文： | 莫宵依,李猛,王德法,师俊平.钨合金三点弯曲破坏的细观数值模拟[J].应用力学学报,2011,28(1). |
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| 作者姓名： | 莫宵依 李猛 王德法 师俊平 |
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| 作者单位： | 西安理工大学,710048,西安 |
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| 摘 要： | 运用有限元方法模拟了钨合金材料的三点弯曲实验;采用单胞单元计算模型,分析了断口形貌与材料力学性能之间的关系;建立了宏观断裂形式与微观结构参数之间的关联.结果表明:裂纹主要产生在 W-W 界面、W-M 界面,且在基体中向前发展,钨合金材料的破坏可归结为延性材料的破坏;裂纹的尖端始终处于应力集中的状态,随着裂纹的扩展,拉应力集中不断释放,并且转移到新的裂纹尖端;裂纹尖端的单元为拉伸破坏,拉应力是导致裂纹扩展的主要因素.
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| 关 键 词： | 钨合金 三点弯曲 数值模拟 界面 |
The micro simulation of failure for the three-point bend specimen of tungsten alloy |
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| Mo Xiaoyi,Li Meng,Wang Defa,Shi Junping.The micro simulation of failure for the three-point bend specimen of tungsten alloy[J].Chinese Journal of Applied Mechanics,2011,28(1). |
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| Authors: | Mo Xiaoyi Li Meng Wang Defa Shi Junping |
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| Institution: | Mo Xiaoyi Li Meng Wang Defa Shi Junping(Department of Engineering Mechanics,Xi'an University of Technology,710048,Xi'an,China) |
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| Abstract: | The three-point bend specimen of tungsten alloy is simulated by using Finite Element code LS-DYNA.And the relation between fractograph and the mechanical properties of tungsten alloy is obtained.The results show that the cracks mainly generate at interface of W-W or W-M,and grow ahead in matrix,so we can consider that the tungsten alloy is a kind of ductile-like material.And the stress always concentrates on the top of crack.The tensile stress releases gradually when the cracks grow.Then the stress concentr... |
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| Keywords: | tungsten alloy three-point bend numerical simulation interface |
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