Ⅰ型裂纹虚拟裂纹闭合法的误差分析及修正
Chinese Journal of Solid Mechanics（2016）
Abstract
对虚拟裂纹闭合法的误差来源进行了分析.依据Griffith的椭圆裂纹近似理论,针对虚拟裂纹闭合法的位移相等假设,提出了一种修正方法.用有限元程序计算了二维Ⅰ型裂纹的扩展问题,并与理论近似解做了比较.计算结果表明,修正以后可以得到更好的精度,在裂纹长度较短时,修正效果更好.
MoreKey words
virtual crack closure technique,error analyzed,finite element method,correction
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