Coupled Flow-thermal Scalable Process Modeling Simulations in Liquid Composite Molding of Composite Structures
نویسنده
چکیده
Net-shape liquid composite molding (LCM) processes for the manufacturing of composite structures involve the permeation of a reactive thermoset polymeric resin through complex, fiber woven preforms. The physical behavior during the processing thus involves coupled multi-physics phenomena consisting of mass, thermal and species transport. The flow process models based on conservation of mass are solved using conventional Galerkin finite element formulations coupled with an implicit fully transient pure finite element methodology. The convective nature of the thermal transport models however require the use of Stabilized Upwinding Petrov-Galerkin formulations and Peclet number controlled stable thermal time steps. In thin shell aerospace composite configurations, the process flow behavior is analyzed through 2.5D thin shell models, with an in-plane flow field that is volume averaged across the thickness (2D in-plane flow). The through thickness conduction however is predominant in the thermal models and cannot be neglected. Discussions on the scalable computational developments and modeling techniques for the coupled 2D-flow/3D-thermal analysis, verifications and validations are presented. The paper also discusses high end computing scalable simulation developments, implementations, issues, and performance of the coupled flow thermal process modeling and simulations in liquid composite molding processes for composite structures employing 2D-Flow/3D-Thermal model configurations.
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