Computer-Aided Study of Materials' Microstructure Influence on Cracks' Propagation Pattern in Brittle Anisotropic Bodies

摘要: The purpose of the presented study is a solution boundary-value problem, visualization and crack propagation pattern plane specimen an anisotropic brittle material by computer modeling method. As main software for research, MSC Nastran finite-element analysis package used. result study, methodology creation models various structural constituents specimens with consideration material’s microstructure developed. Developed tested during model assigned fracture stress concentrators varying forms hypothetical structure, consisting three types crystallite different mechanical properties. proposed evaluation kinetics growth in isotropic materials. step-by-step growth, animation files AVI-format are created, which allow us to analyze process fracture. A theoretical equation determination trajectory, defines relationship between work needed stresses its geometric parameters. An influence on trajectory determined. Results can serve as tool development new materials high resistance due their optimal microstructure. methodologies you determine desired location, size, shape grains properties created material, without fabrication many expensive full-size specimens.