Publication alert
Our collaborative work with the National University of Singapore and Sichuan University on multiscale fracture modeling has been published in the International Journal of Computational Methods. The paper's title: "Direct FE2 based on single integration point for modeling damage evolution of materials with micro-cracks"
The Direct FE2 (2 levels of Finite Element) method is a recently developed concurrent multiscale simulation approach with a monolithic solution scheme, where the macroscopic and microscopic models are solved in a unit iteration process. The conventional Direct FE2 using quadrilateral element encounters some issues in determining the failure state of a macro element, which have not been solved before. In this paper, we developed a new Direct FE2 method based on the Single-integration Point triangle element (Direct SP-FE2) and applied it to simulate micro-crack-induced fracture problems for the first time. In Direct SP-FE2, the failure state of a macro element can be directly predicted by the RVE at the single integration point inside, avoiding the uncertainty associated with predictions by multiple representative volume elements (RVEs). As a result, compared to the conventional version, the proposed Direct SP-FE2 shows advantages in capturing complex geometric boundaries and predicting the damage evolution process and failure state more accurately. The developed method offers a higher computational efficiency (20x to 50x) than the direct numerical simulation schemes.
Link to the external page full paper.
