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CATIA V5-6R2018: Generative Structural Analysis 1–8 © 2020, ASCENT - Center for Technical Knowledge® 1.4 GSA Assumptions and Limitations The GSA's intended users are design engineers rather than FEA experts. The software is intended to be used mostly for linear analyses rather than for complex nonlinear simulations requiring a high level of specialized expertise. As such, its use is subject to the following assumptions and limitations. Linear Material Model The materials in the analysis are assumed to be linear elastic (i.e., the relationship between the stress and the strain follows Hooke's law). The elastic materials are characterized by two properties: Young's modulus (also called Modulus of Elasticity) and Poisson's ratio. The nonlinear material behaviors such as plasticity, hyper-elasticity, or visco-elasticity (or creep) are not supported. Small Displacements and Strains All translations and rotations in the model are assumed small, which means that the equilibrium equations in the analysis are solved on the original (i.e., undeformed) geometry. Also, the strains are assumed small (i.e., under 2,000 microstrain). The geometrically nonlinear simulations involving large displacements and rotations are not supported. Geometrically Linear Contact The word "contact" in FEA refers to varying with the load (i.e., nonlinear) boundary conditions and interactions between the parts. A simple example of such a condition would be an assembly in which initially there is a clearance between the parts, but this clearance gets eliminated and the parts start pressing against each other once the load exceeds a certain magnitude. Although GSA software has some contact analysis capabilities, it is limited to only geometrically linear contact, in which the sliding between the parts in contact is negligible. Geometrically nonlinear contact, such as with finite sliding, is not supported. Sample provided by ASCENT for review only All copying and reuse strictly forbidden.