| 裂纹梁的弹塑性动态断裂 |
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| 引用本文： | 唐国金,袁杰红,相恒波. 裂纹梁的弹塑性动态断裂[J]. 兵工学报, 2000, 21(2): 153 |
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| 作者姓名： | 唐国金 袁杰红 相恒波 |
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| 作者单位： | 国防科学技术大学航天与材料工程学院,湖南长沙,410073 |
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| 摘 要： | 本文利用弹塑性线弹簧模型建立了一种裂纹梁的弹塑性动态断裂分析的新方法 ,它可以对线弹性变形阶段、弹塑性变形阶段、裂纹稳定扩展阶段和裂纹不稳定扩展阶段的裂纹梁动态断裂问题建立易于求解的常微分方程组 ,并对受均布动载作用的裂纹简支梁给出了数值结果
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| 关 键 词： | 动态断裂 裂纹梁 弹塑性线弹簧模型 |
ELASTO-PLASTIC DYNAMIC FRACTURE OF A CRACKED BEAM |
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| Tang Guojin,Yuan Jiehong,Xiang Hengbo. ELASTO-PLASTIC DYNAMIC FRACTURE OF A CRACKED BEAM[J]. Acta Armamentarii, 2000, 21(2): 153 |
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| Authors: | Tang Guojin Yuan Jiehong Xiang Hengbo |
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| Abstract: | A new method that analyzes the elasto plastic dynamic fracture of a cracked beam is established using an elasto plastic line spring model. The dynamic fracture problem of a cracked beam in cases of linear elasticity, of elasto plasticity, when cracks are extending steadily and when cracks are extending unsteadily can all be reduced to a set of ordinary differential equations. Numerical results for a freely supported cracked beam under uniform dynamic loading are given. |
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| Keywords: | dynamic fracture cracked beam elasto-plastic line spring model |
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