Steps towards CAD-FEA integration

Abstract

Using current Computer Aided Design (CAD) and Finite Element Analysis (FEA) pre-processing systems, a large proportion of the analyst's time is spent preparing an idealised model of a part or structure for analysis. Although complete geometric information for the part is often available in the form of a solid model, this is seldom taken advantage of because of the amount of time required to simplify and idealise the geometry for the subsequent meshing stage. In fact, analysts often find it easier to reconstruct the idealised model from scratch, a process which is error prone and prohibits linking the analysis results to the product in a formal way. This paper gives an overview of a future system which would allow and encourage more automated CAD-FEA transformation using tools that operate directly on the solid model. Functional components for such a system are discussed together with issues that should be addressed in order to achieve a fully integrated CAD-FEA transformtion scheme. The overall aim is to make the transition from a solid model to an idealised model suitable for analysis an easier, more robust and less time-consuming task.