Composite De-Tooling Simulation Using an Improved Plate and Shell Theory Base on Mechanics of Structure Genome

摘要

Classical shell elements have difficulty to accurately capture the nonlinear throughthicknessstress gradients and the stresses due to material anisotropy. The improvedplate and shell theory by means of Mechanics of Structure Genome (MSG) appears asa feasible approach to reproduce high fidelity residual stress simulations in thermosetpolymers while greatly reducing the computational time. The Structure Genome (SG)is defined as the smallest mathematical building block of the structure containingmany such building blocks. For composite laminates, the reference surface can bedescribed as a 2D continuum and the microstructure of every material point of thiscontinuum is modeled by means of the specific SG, which is the material line of thetransverse normal. Thereby, the original 3D anisotropic elasticity problem is cast inan intrinsic form and hence, arbitrarily large displacements and global rotations canbe handled subjected only to strains being small. In this work the simulation of a continuousfiber-reinforced composite de-tooling process using two different approachesis presented, which are then compared against the detailed 3D FEA developed in theABAQUS/COMPRO CCA platform. On the one hand, smeared though-thicknessproperties are considered in the ABAQUS/COMPRO CCA platform in order to minimizethe amount three-dimensional solid elements required. On the other hand, thesame simulation is carried out using the MSG-based plate and shell theory. The comparisonof the results reveal that later methodology considerably reduces the computationaltime and cost without compromising the accuracy of displacement resultsand providing detailed stress distribution.