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High Velocity Impact Simulation of Brittle Materials with Node Separation Scheme in Parallel Computing Environment

Ji Joong Moon1, Seung Jo Kim1, Minhyung Lee2
School of Mechanical and Aerospace Engineering, Seoul National University, Seoul, Republic of Korea.
School of Mechanical and Aerospace Engineering, Sejong University, Seoul, Republic of Korea.

Computer Modeling in Engineering & Sciences 2010, 59(3), 275-300. https://doi.org/10.3970/cmes.2010.059.275

Abstract

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.

Keywords

Parallelization, contact-impact analysis, load balancing, brittle material, node separation.

Cite This Article

Moon, J. J., Kim, S. J., Lee, M. (2010). High Velocity Impact Simulation of Brittle Materials with Node Separation Scheme in Parallel Computing Environment. CMES-Computer Modeling in Engineering & Sciences, 59(3), 275–300.



This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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