Composites can undergo micro damage leading to variations of the mechanical properties. The micro damage can be the result of high internal pressures and/or exposure to physical trauma. Modeling techniques, such as homogenization, are effective outside of these critical regions. However they break down in regions where the micro damage is occurring. To account for this, an algorithm has been developed to detect and implement a multiscale method on elements that observe a critical strain. The remaining model uses the homogenization method to simulate the composite. The elements surrounding the multiscale elements are adapted to act as a transition from multiscale to the homogenization. The multiscale approach is based on the partition of unity paradigm, allowing macro-scale computations to be performed with the micro-structural features explicitly considered. The model has been validated by comparing it to experimental results of a composite overwrapped steel tube section subjected to high internal pressures.
Modeling Automatic Detection of Critical Regions in Composite Pressure Vessel Subjected to High Pressure
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Macri, MF, II, Littlefield, AG, Root, JB, & Smith, LB. "Modeling Automatic Detection of Critical Regions in Composite Pressure Vessel Subjected to High Pressure." Proceedings of the ASME 2018 Pressure Vessels and Piping Conference. Volume 3A: Design and Analysis. Prague, Czech Republic. July 15–20, 2018. V03AT03A005. ASME. https://doi.org/10.1115/PVP2018-84168
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