3D modeling of fracture in brittle isotropic materials using a novel algorithm for the determination of the fracture plane orientation and crack surface area
- 作者：Michael May ; Michael.May@emi.fhg.de ; Sebastian Kilchert ; Stefan Hiermaier
- 关键词：Fracture mechanics ; Crack initiation ; Crack orientation ; Crack growth
- 刊名：Finite Elements in Analysis and Design
- 出版年：2012
- 期刊代码：53_0168874x
- 类别：cp
- 出版时间：September, 2012
- 卷：56
- 期：Complete
- 页码：32-40
- 文件大小：1648 K
摘要
A user defined material model for simulation of brittle fracture in isotropic materials was implemented into the explicit FE code Abaqus/Explicit. The model uses a methodology for calculating the orientation of the fracture plane in isotropic materials in 3D space using an analytical approach. Knowing the orientation of the fracture plane, the cross-sectional area of the fracture surface can in a hexagonal element can be calculated. Regularization is then achieved using the size of the fracture plane. The model is first tested on single-element tests and then applied to more complex test cases such as a short bar with chevron notch or micromechanical analyses of composite materials. The numerical predictions correlate well with experimental evidence from the literature.