Automation of Modeling and Data Transfer in a Global-Intermediate-Local Analysis Based on ANSYS

Due to the complication of stress distribution around the crack tips, it is hard to obtain the fracture parameters (Stress intensity factor, J-integral factor) in a 3-dimention model. According to this condition, some kinds of methods to simplify the model or calculation procedure are carried out. Basically for the crack in the thin shell structure, the parameters can be obtained finally from local models. This paper describes the hierarchical analysis strategy. It is a high efficient method for fracture mechanics analysis, which includes three main steps: model simplification, subregion extraction, and boundary condition transfer. A fracture parameter calculation system based on automated global-intermediate-local procedure to simulate cracked airplane panel tests was developed based on ANSYS. This system may create models of three stages, transfer boundary conditions, calculate and obtain fracture parameter automatically using APDL of ANSYS. New menus are made as well for these procedures in this system using UIDL of ANSYS.

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