A multi-temporal scale approach to high cycle fatigue simulation

作者：Bhamare Sagar; Eason Thomas; Spottswood Stephen; Mannava Seetha R; Vasudevan Vijay K; Qian Dong^*

来源：Computational Mechanics, 2014, 53(2): 387-400.

DOI：10.1007/s00466-013-0915-y

• Space-time method
• Enrichment
• High cycle fatigue
• Two-scale damage model
• Direct numerical simulation

High cycle fatigue (HCF) is a failure mechanism that dominates the life of many engineering components and structures. Time scale associated with HCF loading is a main challenge for developing a simulation based life prediction framework using conventional FEM approach. Motivated by these challenges, the extended space-time method (XTFEM) based on the time discontinuous Galerkin formulation is proposed. For HCF life prediction, XTFEM is coupled with a two-scale continuum damage mechanics model for evaluating the fatigue damage accumulation. Direct numerical simulations of HCF are performed using the proposed methodology on a notched specimen of AISI 304L steel. It is shown the total fatigue life can be accurately predicted using the proposed simulation approach based on XTFEM. The presented computational framework can be extended for predicting the service and the residual life of structural components.

• 出版日期2014-2