Void growth simulations in single crystals

• Published in: Computational mechanics Vol. 20; no. 1-2; pp. 115 - 121
• Main Authors: O'REGAN, T. L, QUINN, D. F, HOWE, M. A, MCHUGH, P. E
• Format: Conference Proceeding Journal Article
• Language: English
• Published: Heidelberg Springer 01.07.1997; Berlin Springer Nature B.V
• Subjects: Coalescing; Computer simulation; Condensed matter: structure, mechanical and thermal properties; Crystal growth; Deformation; Exact sciences and technology; Fatigue, brittleness, fracture, and cracks; Finite element method; Fracture mechanics (crack, fatigue, damage...); Fracture mechanics, fatigue and cracks; Fundamental areas of phenomenology (including applications); Mechanical and acoustical properties of condensed matter; Mechanical properties of solids; Physics; Plane strain; Single crystals; Solid mechanics; Structural and continuum mechanics; Two dimensional models; Constitutive equation; High strain; Ruptures; Numerical method; Cavitation; Cobalt; Crystalline material; Finite element method; Monocrystals; Composite materials; Elastoplasticity; Plane strain; Ductile material; Tungsten carbides
• ISSN: 0178-7675; 1432-0924
• DOI: 10.1007/s004660050226

The growth and coalescence of microvoids leading to ductile failure in single crystals is simulated using the finite element method. Finite deformation, rate dependent, crystal plasticity theory is used in the context of 2D plane strain models. The details of material failure at the microscale and macroscale are investigated under variation in a range of parameters including void volume fraction, loading state and lattice structure and orientation. Remeshing is used to improve accuracy of results. Results are compared with those produced by models based on other constitutive theories and experimental observation.