Development of Extendable CAE Foundation Software by Free-Mesh Method

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In this research, we developed a CAE foundation software which can generate domain decomposition parallel analysis programs based on the free-mesh method. This software was opened to public as a flee software. The functions of the software are three dimensional structural analysis, and pre-and post processor, including plug-ins to connect with GiD developed at the International Center for Numerical Methods in Engineering, Barcelona, Spain. The research results can be summarized as follows :-The software was designed by using the Design Patterns to attain easy extendability of functions.-High precision 4-node tetrahedral element was developed and applied to 3-dimensional flow analysis of fresh concrete. A3-dimensional crack propagation program was also developed and applied to 2 phase material with bone material and mortar.-A CAE system which can analyze 3-dimensional complicated shaped body seamlessly from CAD models to calculated results was developed and applied to crack propagation problem with mixed mode loading.-A fast parallelized local mesh generation algorithm was developed by using Quasi-constrained Delaunay triangulation method based on the Gift Wrapping Method. This algorithm enabled to generate numerical models of structures having internal cracks.-A-3-dimensional free-mesh analysis program of transient heat-transfer problems was developed, as an application to a dynamic problem.-A 2-dimensional free-mesh analysis program of crack propagation problem was developed and the results were compared and verified with those of finite element analyses.