Modeling and analysis of failure initiation and progression of 3D braided composites: a multi-region multi-cell approach

초록

Accurate modeling and analysis are keys to obtaining precise failure behavior of advanced composites with manufacturing details. However, existing models lack a unique shape and fail to account for the intricate yarn path and manufacturing nuances. The current work emphasizes multi-region-based multi-cell models to analyze the damage initiation and progression behavior of 3D braided polymer composites under tensile loading. The progressive damage model is applied with Hashin 3D UMAT and maximum stress failure criteria for the modeled fiber bundle and matrix in the finite element analysis framework. Also, the effects of the void are considered to incorporate manufacturing-induced variations. The damage initiation and progression results are shown with stress-strain curves and verified with existing literature. It is obtained that the observed damage varies according to the different regions of the composite structure. The significant advantage of the current work is that it emphasizes modeling and failure analysis that accounts for manufacturing intricacies, enabling accurate representation of complex advanced composites using a computationally efficient small-scale model. Results and discussions indicate that this approach can be utilized to predict the failure of 3D complex shape composites efficiently.

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