Abstract
The article presents a technique for process-induced residual strain modeling for thermoset composite material parts. The model takes into account the mechanical and thermal contact between the part and the mold. The technique is implemented in the ABAQUS software using user subroutines. Using the technique, it is possible to clarify the distribution of the heat transfer coefficient on the surface of the part and mold using the CFD method. Distribution of heat transfer coefficients are obtained in ANSYS CFX under the appropriate process conditions. The method is verified for the U-shaped sample. Also, the results of modeling the stringer-stiffened curved composite panel using the developed technique without taking into account the mold and heat transfer coefficient distribution are presented.
Highlights
Products made of thermoset composite materials are widespread in the aviation, shipbuilding, automotive, energy, and other industries
It is especially important to take this phenomenon into account to simulate for large-sized products of complex shape. For some of these thin-walled structures, increased requirements are imposed on shape accuracy and the uneven distribution of heat transfer coefficient (HTC) can significantly influence the accuracy of modeling residual strains
Mold through thermal expansion and mechanical contact affects the final shape of the part
Summary
Products made of thermoset composite materials are widespread in the aviation, shipbuilding, automotive, energy, and other industries. Various approaches and aspects of cure modeling and process-induced strains are presented in [17,18,19,20,21]. It is especially important to take this phenomenon into account to simulate for large-sized products of complex shape For some of these thin-walled structures, increased requirements are imposed on shape accuracy (for example, antenna reflectors [24, 25]) and the uneven distribution of HTC can significantly influence the accuracy of modeling residual strains. The above approaches are combined and a new technique for modeling a laminated composite taking into account thermal and chemical shrinkage, as well as mechanical and thermal contact with the mold is presented. The goal of this research is to propose an engineering approach for shape distortion prediction taking into account these phenomena
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