| 热和机械载荷联合作用下的通用权函数法及应用 |
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| 引用本文： | 周国斌,卢炎麟. 热和机械载荷联合作用下的通用权函数法及应用[J]. 机械工程学报, 2007, 43(6): 116-121 |
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| 作者姓名： | 周国斌 卢炎麟 |
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| 作者单位： | 浙江工业大学机械制造及自动化教育部重点实验室,杭州,310032;浙江工业大学机械制造及自动化教育部重点实验室,杭州,310032 |
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| 基金项目： | 国家自然科学基金 , 浙江省教育厅资助项目 |
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| 摘 要： | 将热权函数法拓展为包括温度载荷、表面力和体积力等机械载荷在内的通用权函数法.通用权函数只与物体的几何形状有关,与时间及载荷无关.利用多虚拟裂纹扩展技术,给出热和机械载荷联合作用下的三维Ⅰ型裂纹问题通用权函数法的有限元格式.通用权函数法特别适合于计算复杂冲击载荷下应力强度因子分布的过渡过程.计算实例表明,通用权函数法具有很高的计算效率,又具有与COD法相当的精度.
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| 关 键 词： | 通用权函数 多虚拟裂纹扩展法 应力强度因子 有限元法 |
| 修稿时间： | 2006-12-19 |
UNIVERSAL WEIGHT FUNCTION METHOD FOR MECHANICAL AND THERMAL LOADING AND ITS APPLICATION |
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| ZHOU Guobin,LU Yanlin. UNIVERSAL WEIGHT FUNCTION METHOD FOR MECHANICAL AND THERMAL LOADING AND ITS APPLICATION[J]. Chinese Journal of Mechanical Engineering, 2007, 43(6): 116-121 |
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| Authors: | ZHOU Guobin LU Yanlin |
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| Abstract: | The thermal weight function (TWF) method is ex-tended to the universal weight function (UWF) method suitable for mechanical and thermal loadings. The UWF is dependent only on the crack configuration and body geometry, and is in-dependent of time and loads. The finite element implementation of the UWF method for 3-D Mode I cracks subjected to me-chanical and thermal loadings is given by using the multiple virtual crack extension (MVCE) method. The UWF method is especially suitable for determining the variation of transient stress intensity factors (SIFs) of a cracked body subjected to thermal and mechanical shock. Numerical results show that UWF method is of high efficiency and of good accuracy as the COD method. |
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| Keywords: | Universal weight function method Multiple virtual crack extension method Stress intensity factor Finite element method |
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