A full product/process numerical workflow based on Skin Model Shapes for tolerancing analysis of an assembly of composite parts

In their works, in 2014, N. Anwer & al. introduced the concept of Skin Model Shape (SMS). Their main idea was to propose parts representations with geometric deviations in the discrete geometry framework for CAT. In this paper, an application of the SMS to a full product/process tolerancing assembly analysis process of composite parts is proposed, with a numerical workflow between softwares. The RTM process simulation of composite parts, with systematic shape distortions estimation, is realized with PAM-RTM/DISTORTION®. The product/process uncertainties propagation ensures to capture the random geometrical variations, using OpenTurns®. The assessment of the tolerances is done with virtual coordinates measurements, from extracted nodal points of the FEA meshing. The final effects of the tolerances of the parts are then measured on a mechanical assembly by a tolerancing stack-ups analysis, using MECAmaster®.