Abstract
The interface has a significant influence on the macroscopic mechanical behaviors of composite materials, with interface cracking being a typical failure event. The ability to precisely describe the mechanical behavior of the interface is critical for analyzing the failure of composite materials. Based on plasticity theory and damage mechanics, an elastic-plastic interface constitutive model is developed to simulate the irreversible plastic deformation at the interface under the cyclic loading condition. Furthermore, by incorporating a damage factor in scalar form, the model is able to simulate mixed loading forms (Modes I and II). The influence of interfacial strength and toughness on the overall mechanical properties of unidirectional fiber reinforced composites under transverse loading is studied with this model. The simulation results are consistent with the experimental data in the literature, demonstrating the model’s effectiveness. The model can be used to simulate the mechanical behavior of composites with interfaces under cyclic loading, and it is helpful for understanding the plastic behavior and damage accumulation at the interfaces in the composites.
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This work was supported by the National Natural Science Foundation of China (Grant Nos. 11972057, 12272021, and 11972058), the National Science and Technology Major Project (Grant No. 2017-VII-0003-0096). The support from Super Computing Center ScGrid/CNGrid of CAS was also gratefully acknowledged.
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Xia, T., Qian, Y., Xu, S. et al. An incremental elastic-plastic cohesive constitutive model with considering damage. Sci. China Technol. Sci. 66, 3651–3662 (2023). https://doi.org/10.1007/s11431-022-2314-3
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DOI: https://doi.org/10.1007/s11431-022-2314-3