Large-Scale Simulation of Ductile Fracture Process of Microstructured Materials

Abstract

The promise of computational science in the extreme-scale computing era is to reduce and decompose macroscopic complexities into microscopic simplicities with the expense of high spatial and temporal resolution of computing. In materials science and engineering, the direct combination of 3D microstructure data sets and 3D large-scale simulations provides unique opportunity for the development of a comprehensive understanding of nano/microstructure-property relationships in order to systematically design materials with specific desired properties. In the paper, we present a framework simulating the ductile fracture process zone in microstructural detail. The experimentally reconstructed microstructural data set is directly embedded into a FE mesh model to improve the simulation fidelity of microstructure effects on fracture toughness. To the best of our knowledge, it is for the first time that the linking of fracture toughness to multiscale microstructures in a realistic 3D numerical model in a direct manner is accomplished.

FFT phase-field model combined with cohesive composite voxels for fracture of composite materials with interfaces

“…Although massive parallel implementations and large-scale FE simulations have been developed, e.g. [15][16][17], it is still not straightforward to generalise the methodologies to nonlocal damage models. The method based on the fast Fourier transform (FFT) has been proposed as an efficient alternative to conventional FE methods [18] to speed up the solution of composite problems in the context of homogenisation theory.…”

Analysis of the damage initiation in a SiC/SiC composite tube from a direct comparison between large-scale numerical simulation and synchrotron X-ray micro-computed tomography

“…Although techniques such as domain decomposition [24,25] or multigrid methods [26,27] have been proposed, memory-distributed parallel implementation of these methods is not straightforward and usually requires specific skills (see applications with over billions of elements in e.g. [28][29][30][31]). This difficulty hinders matrix-based FEM to be applied to numerical models with a very large number of elements.…”

Large-scale simulations of quasi-brittle microcracking in realistic highly heterogeneous microstructures obtained from micro CT imaging

“…In [17,16], Mosby and Matouš developed hierarchically parallel solvers based on multi-scale simulations on extreme scales in terms of both physical length scales and computed capabilities resources, and show the ability to efficiently compute the failure of heterogeneous samples from sub-micrometer to centimeter scales in damage mechanics problems of particle-reinforced adhesives. In [24], another multiscale framework using large-scale simulations at the microstructural level has been proposed to study cracking in a ultra-high strength steel.…”

“…Such simulations can be either used within multiscale simulations such as in [17,16,24], or in combined experiments/simulations sub-volume techniques as described in [18] to accurately describe the damage due to microscale cracking.…”