| 含缺陷半无限长梁在阶跃载荷作用下的塑性动力特性及失效分析 |
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| 引用本文： | 张娅,赵军.含缺陷半无限长梁在阶跃载荷作用下的塑性动力特性及失效分析[J].固体力学学报,2007,28(1):55-59. |
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| 作者姓名： | 张娅 赵军 |
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| 作者单位： | 北京化工大学机电工程学院,北京,100029 |
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| 基金项目： | 北京化工大学青年教师自然科学研究基金(QN0510)资助 |
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| 摘 要： | 分析了在任意位置含一缺陷的半无限长梁在自由端受阶跃载荷作用下的刚塑性动力响应,重点讨论了结构响应模式和缺陷处的能量耗散,给出了不同载荷大小和缺陷参数组合下的完全解,所得结果对确定管道结构的动态失效准则有参考价值.
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| 关 键 词： | 含缺陷梁 能量耗散 缺陷敏感函数 |
| 修稿时间： | 2006年3月8日 |
DYNAMIC PLASTIC RESPONSE AND FAILURE ANALYSIS OF A NOTCHED SEMI-INFINITE LONG BEAM SUBJECTED TO STEP-LOADING AT FREE END |
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| Zhang Ya,Zhao Jun.DYNAMIC PLASTIC RESPONSE AND FAILURE ANALYSIS OF A NOTCHED SEMI-INFINITE LONG BEAM SUBJECTED TO STEP-LOADING AT FREE END[J].Acta Mechnica Solida Sinica,2007,28(1):55-59. |
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| Authors: | Zhang Ya Zhao Jun |
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| Abstract: | A rigid perfectly plastic model is developed to study the dynamic response of a semi-infinite long beam with an initial notch under a concentrated step-loading applied at the free end of the beam.Special attention is paid to the deformation mechanism and plastic energy dissipation at notched section.Complete solutions are obtained for various combinations of the notch size and the load level.The present results are valuable to construct the dynamic failure criteria of pipeline structure. |
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| Keywords: | notched beam energy dissipation defect sensitivity function |
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