| 梁在纯弯曲力矩作用下的动态塑性断裂 |
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| 引用本文： | 朱锡,华天瑞.梁在纯弯曲力矩作用下的动态塑性断裂[J].力学学报,1989(2). |
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| 作者姓名： | 朱锡 华天瑞 |
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| 作者单位： | 国防科技大学航天技术系
(朱锡)，国防科技大学航天技术系(华天瑞) |
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| 摘 要： | 本文采用刚塑性分析方法,研究了带裂纹有限长韧性材料梁在纯弯曲力矩作用下的动态塑性断裂过程,本文考虑了由于断裂引起的附加轴向力对断裂过程的影响,并在分析中考虑了应变率对断裂过程的影响。文章给出了断裂过程中断裂截面上弯曲力矩和轴向力随时间的变化规律,以及裂纹长度,裂纹扩展速度和加速度随时间的变化规律。
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| 关 键 词： | 粱的断裂 动态断裂 全塑性 纯弯曲 |
DYNAMIC PLASTIC FRACTURE OF A BEAM IN PURE BENDING |
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| Zhu Xi,Hua Tianrui.DYNAMIC PLASTIC FRACTURE OF A BEAM IN PURE BENDING[J].chinese journal of theoretical and applied mechanics,1989(2). |
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| Authors: | Zhu Xi Hua Tianrui |
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| Abstract: | The dynamic plastic fracture response of a beam of finite length made of "soft" material subjected to pure bending is investigated using the method of rigid-plastic modeling. In our work, a dynamically induced axial force which is generated during the fracture process is included and the effect of strain rate is considered in the analysis. Formulations about the crack length, crack tip velocity, crack tip accelaration, bending moment and axial force at the fracturing section are determined as functions of time after crack initiation, the results can be applied to the fracture of a plate in pure bending. |
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| Keywords: | pure bending quasi-static loading fracture of a beam dynamic fracture fully plastic fracture |
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