TY - EJOU AU - Moon, Ji Joong AU - Kim, Seung Jo AU - Lee, Minhyung TI - High Velocity Impact Simulation of Brittle Materials with Node Separation Scheme in Parallel Computing Environment T2 - Computer Modeling in Engineering \& Sciences PY - 2010 VL - 59 IS - 3 SN - 1526-1506 AB - This paper describes the parallelization of contact/impact simulation for fracture modeling of brittle materials using a node separation scheme (NSS). We successfully demonstrated the fracture modeling of brittle materials using a cohesive fracture model. Since a NSS continuously generates new free surfaces as the computation progresses, the methodology requires increased computational time. To perform a simulation within a reasonable time period, a parallelization study is conducted. Particular methods for effective parallelization, especially for brittle materials, are described in detail. The crucial and most difficult strategy is the management of the data structure and communication needed to handle new contact nodes and surfaces. We also developed an efficient domain decomposition definition for the contact calculation, and implemented a user-controlled dynamic load-balancing algorithm. These efforts resulted in enhanced parallel performance as demonstrated by numerical test problems. KW - Parallelization KW - contact-impact analysis KW - load balancing KW - brittle material KW - node separation DO - 10.3970/cmes.2010.059.275