A Multiscale Approach to Studying the High Strain-Rate Deformations of Glass-Fiber-Reinforced Polymer-Matrix Composites
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The mechanical properties and failure of composites depend on their microscopic characteristics (constituent properties and microscopic structural features). The continuum theory cannot explain the failure mechanism of composite materials in terms of connecting microscopic damage to the macroscopic fracture. In this paper, a multiscale method combining the High-Fidelity Generalized Method of Cells with ANSYS/LS-DYNA is presented. The method is validated by comparing calculations with experimental results. A nonlinear analysis of glass-fiber-reinforced polymer-matrix composites at high strain rates is performed. The results obtained show that the method presented can be effectively used to predict the mechanical properties of polymer-matrix composites and the increase in stiffness of the composites with growing strain rate.
Keywordsmultiscale method polymer composites micromechanics high strain rate
This work was supported by the National Natural Science Foundation of China (Nos. 51675397 and 51805400), the National Natural Science Foundation of Shaanxi Province (Nos. 2018JZ5005 and 2017JQ5002), China Scholarship Council (No. 201706965037), and Fundamental Research Funds for the Central Universities (No. JB180414), Project No. B14042. The first author is also grateful to the Engineering Department, Lancaster University, for the support he received during of his visit.
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