三维非平面裂纹扩展参数化模拟方法

李宇飞; 陶海亮; 高庆; 谭春青

doi:10.13224/j.cnki.jasp.2017.12.010

三维非平面裂纹扩展参数化模拟方法

doi: 10.13224/j.cnki.jasp.2017.12.010

1.
中国科学院工程热物理研究所轻型动力重点实验室,北京 100190；中国科学院大学物理科学学院,北京 100049
2.
中国科学院工程热物理研究所轻型动力重点实验室,北京 100190

基金项目: 中国科学院创新基金（CXJJ14S119）

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出版历程
- 收稿日期: 2016-05-30
- 刊出日期: 2017-12-28

Parametric simulation method for 3-D non-planar crack propagation

摘要

摘要: 发展一种基于有限元方法（FEM）的自动模拟三维非平面裂纹扩展的模拟方法。该方法采用参数化建模的方式建立裂纹体,以镶嵌裂纹体的方式在结构中插入裂纹,然后通过有限元计算得到裂纹扩展参量,自动更新裂纹体从而模拟裂纹的扩展过程。通过模拟三个裂纹扩展算例,计算了裂纹扩展循环数,对比试验结果,误差分别为195%、161%、21%。结果表明:该方法能够模拟三维非平面裂纹的扩展并计算扩展寿命,具有一定的精度和适用性。
- 损伤容限 /
- 裂纹扩展 /
- 三维非平面裂纹 /
- 有限元方法 /
- 参数化建模
Abstract: An automatic 3-D non-planar crack propagation simulation method based on finite element method (FEM) was developed. This method established cracked block by parametric modeling method, inserted initial crack in structure model by inlaying the cracked block, then acquired crack propagation parameters through FEM analysis; then it automatically updated cracked block to simulate the propagation process of crack. Through the simulation of three crack propagation cases, the crack propagation cycles were calculated; compared with the experimental results, the errors were 19.5%, 16.1%, 2.1% respectively. The results show that this method can simulate nonplanar 3-D crack propagation and calculate propagation life with accuracy and applicability.
- damage tolerance /
- crack propagation /
- 3D nonplanar crack /
- finite element method /
- parametric modeling

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