|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Algorithm Development in Materials Science and Engineering
||Crack-tip Simulation Validations by XGP Multiscale Methods
||Jinghong Fan, Ross Stewart, Taolong Xu
|On-Site Speaker (Planned)
Accuracy validation of atomistically-based multiscale simulations with classical continuum solutions is developed after handling two types of data with one being continuous and the other is point-wise. The basic issue for improving the existing multiscale scheme is addressed by the newly developed multiscale method XGP, short for an extension of the generalized particle method proposed by Fan (2009). Its accuracy is confirmed with analytical solutions of an edge-crack in a two dimensional plate. Using an asymptotic approach, the XGP explores that there exists a problem-dependent critical model size, LCR, above which may not be necessary under a given error tolerance and below which the obtained traction-separation (TS) curve of cohesive fracture model may underestimate material resistance measured by the critical energy release rate, GIC, as well as overestimate the initialization strain for BCC to FCC phase transformation. Applications include dislocation development and material behavior under metallic twin-crack interactions.
||Planned: Supplemental Proceedings volume