| 基于虚拟裂纹闭合法计算裂纹扩展的能量释放率 |
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| 引用本文： | 肖涛,左正兴,刘栋,龙凯.基于虚拟裂纹闭合法计算裂纹扩展的能量释放率[J].北京理工大学学报,2010,30(1):37-41. |
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| 作者姓名： | 肖涛 左正兴 刘栋 龙凯 |
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| 作者单位： | 北京理工大学,机械与车辆学院,北京,100081;北京理工大学,机械与车辆学院,北京,100081;北京理工大学,机械与车辆学院,北京,100081;北京理工大学,机械与车辆学院,北京,100081 |
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| 基金项目： | 国家部委预研项目(40402010105) |
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| 摘 要： | 研究利用虚拟裂纹闭合法(VCCT)和通用有限元程序计算裂纹扩展能量释放率(G).利用开发的接口单元,将VCCT集成于有限元软件中.基于这一原理,通过ABAQUS用户单元子程序UEL编写9,16,20节点接口单元,将VCCT法集成于8节点和20节点6面体网格中,直接通过有限元计算输出能量释放率,无需进行复杂的后处理.最后,通过2个算例对该接口单元进行了验证.结果表明,利用所编写的界面单元能够得到准确的计算结果,同时提高了计算效率.
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| 关 键 词： | 能量释放率 虚拟裂纹闭合法 接口单元 有限元法 |
| 收稿时间： | 2008/11/27 0:00:00 |
Computation of the Crack Propagation Energy Release Rate Based on the Virtual Crack Closure Technique |
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| XIAO Tao,ZUO Zheng-xing,LIU Dong and LONG Kai.Computation of the Crack Propagation Energy Release Rate Based on the Virtual Crack Closure Technique[J].Journal of Beijing Institute of Technology(Natural Science Edition),2010,30(1):37-41. |
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| Authors: | XIAO Tao ZUO Zheng-xing LIU Dong and LONG Kai |
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| Institution: | School of Mechanical Engineering;Beijing Institute of Technology;Beijing 100081;China |
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| Abstract: | Computation of the energy release rate(G) based on the virtual crack closure technique(VCCT) and finite element method is presented.The process is really redundancy when calculating the G value by processing the results of finite element method.However,the VCCT method can be implemented into finite element software by developing the interface element.Based on the principle,9,16,20node interface element were compiled via the ABAQUS user-defined element(UEL) procedure.Then they can be integrated into the 8nod... |
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| Keywords: | energy release rate virtual crack closure technique interfacial element FEM |
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