Abstract

In this work, the extended isogeometric analysis (XIGA) is presented for the analysis of cracks in elastic material subjected to thermal, mechanical, and thermo-mechanical loading. The comparative study on the effect of mechanical and combined thermo-mechanical load on stress intensity factors (SIFs) is performed. Two types of cracks, i.e., isothermal and adiabatic crack, is considered for the simulation. The crack is modeled using suitable enrichment functions. A modified domain-based interaction integral approach is used to extract the SIFs. Several simulations are performed to validate the accuracy of the results. Moreover, the effect of discontinuities (e.g., voids) on SIFs is analyzed.

摘要

在这项工作中，扩展等几何分析 (XIGA) 用于分析弹性材料在热、机械和热机械载荷下的裂纹。对机械载荷和热机械联合载荷对应力强度因子 (SIF) 的影响进行了比较研究。模拟中考虑了两种类型的裂纹，即等温裂纹和绝热裂纹。使用合适的富集函数对裂纹进行建模。改进的基于域的交互积分方法用于提取 SIF。进行了多次模拟以验证结果的准确性。此外，分析了不连续性（例如，空隙）对 SIF 的影响。