基于ANSYS软件的三维裂纹实体建模方法

发布时间：2018-02-23 13:41

本文关键词： 三维裂纹实体建模方法应力强度因子　出处：《济南大学学报(自然科学版)》2017年04期 　论文类型：期刊论文

【摘要】：为了解决三维裂纹建模因需要体现裂纹前沿处裂纹尖端的应力奇异性而呈现的复杂性问题,给出采用基于ANSYS软件的实体建模法创建三维椭圆形裂纹有限元模型的详细步骤,并利用基于ANSYS软件的实体建模方法,建立中心表面裂纹、孔边角裂纹、穿透裂纹模型;通过算例,比较三维穿透裂纹采用基于ANSYS软件的实体建模法与逐节点直接建模法所得到的裂纹尖端应力强度因子值。结果表明:基于ANSYS软件的实体建模法具有足够的应力强度因子求解精度,验证了实体建模法求解应力强度因子的可靠性;该三维裂纹模型创建方法仅通过修改建模命令流中的部分参数即可生成裂纹尺寸不同的裂纹模型。
[Abstract]:In order to solve the complex problem of 3D crack modeling which needs to reflect the stress singularity of crack tip at the crack front, the detailed steps of creating 3D elliptical crack finite element model by using entity modeling method based on ANSYS software are presented. Using the solid modeling method based on ANSYS software, the model of center surface crack, hole edge crack and penetrating crack is established. The stress intensity factor values of crack tip obtained by using solid modeling method based on ANSYS software and direct modeling method based on node by node are compared. The results show that the solid modeling method based on ANSYS software has enough stress intensity. The accuracy of solving the degree factor, The reliability of the solid modeling method for solving the stress intensity factor is verified and the crack model with different crack sizes can be generated by modifying only some parameters in the modeling command stream.
【作者单位】：山东理工大学建筑工程学院;山东省淄博市市政规划设计研究院;
【基金】：国家自然科学基金项目(50830203)
【分类号】：O346.1

【相似文献】