Identification of the material properties needed in cure simulations from inverse analysis and finite element homogenization
(2013) 17th International Conference on Composite Structures (ICCS17) — Location: FEUP Porto (17.June.2013)
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- Authors
Bailly, Christian 
- Abstract
- Manufacturing a composite part to a certain shape can be challenging because of the distortions which arise during the curing process. These distortions are the result of thermal expansion and chemical shrinkage that develop in the course of the curing cycle. The deviation between the final part and the original design is often an issue when the time comes to assemble several parts together. Therefore, reducing this deviation is crucial for manufacturers. In the view to developing numerical tools to optimize the shape of the mold, curing simulations are a mandatory asset. Modeling the curing process of epoxy-based composite structures requires the knowledge of a large number of material parameters. Characterizing all of those properties would be far too costly and time- consuming. We propose to determine the most influential properties through reverse analysis on simple structures which show significant distortions, and compare those properties with the results obtained with finite element analysis performed at the micro-scale, where the continuous evolution of the resin's moduli during cure is taken into account. The obtained values are then used for the simulation of larger structures, where each ply is considered as a homogeneous material whose properties are constant within each state of the resin. This approach allows for computationally efficient curing simulations of large-scale structures while maintaining a good accuracy.
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Citations
Wucher, B., Lani, F., Martiny, P., Pardoen, T., & Bailly, C. (2013). Identification of the material properties needed in cure simulations from inverse analysis and finite element homogenization. 17th International Conference on Composite Structures (ICCS17), FEUP Porto. https://hdl.handle.net/2078.5/274194