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Multiscale dynamic fracture analysis of composite materials using adaptive microstructure modeling
Author(s) -
Baek Hyunil,
Kweon Chulmin,
Park Kyoungsoo
Publication year - 2020
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/nme.6521
Subject(s) - microstructure , fracture (geology) , materials science , nonlinear system , multiscale modeling , computation , boundary (topology) , fracture mechanics , mechanics , computer science , topology (electrical circuits) , structural engineering , composite material , algorithm , mathematics , mathematical analysis , engineering , physics , chemistry , computational chemistry , quantum mechanics , combinatorics
In this study, a computational framework is proposed to investigate multiscale dynamic fracture phenomena in materials with microstructures. The micro‐ and macro‐scales of a composite material are integrated by introducing an adaptive microstructure representation. Then, the far and local fields are simultaneously computed using the equation of motion, which satisfies the boundary conditions between the two fields. Cohesive surface elements are dynamically inserted where and when needed, and the Park‐Paulino‐Roesler cohesive model is employed to approximate nonlinear fracture processes in a local field. A topology‐based data structure is utilized to efficiently handle adjacency information during mesh modification events. The efficiency and validity of the proposed computational framework are demonstrated by checking the energy balances and comparing the results of the proposed computation with direct computations. Furthermore, the effects of microstructural properties, such as interfacial bonding strength and unit cell arrangement, on the dynamic fracture behavior are investigated. The computational results demonstrate that local crack patterns depend on the combination of microstructural properties such as unit cell arrangement and interfacial bonding strength; therefore, the microstructure of a material should be carefully considered for dynamic cohesive fracture investigations.