排序方式: 共有1条查询结果,搜索用时 31 毫秒
1
1.
John Dolbow Nicolas Moës Ted Belytschko 《Finite Elements in Analysis and Design》2000,36(3-4):235-260
A technique is presented to model arbitrary discontinuities in the finite element framework by locally enriching a displacement-based approximation through a partition of unity method. This technique allows discontinuities to be represented independently of element boundaries. The method is applied to fracture mechanics, in which crack discontinuities are represented using both a jump function and the asymptotic near-tip fields. As specific examples, we consider cracks and crack growth in two-dimensional elasticity and Mindlin–Reissner plates. A domain form of the J-integral is also derived to extract the moment intensity factors. The accuracy and utility of the method is also discussed. 相似文献
1