An incremental elastic-plastic cohesive constitutive model with considering damage

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. Ba...

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Bibliographic Details
Published in:Science China. Technological sciences 2023-12, Vol.66 (12), p.3651-3662
Main Authors: Xia, Tong, Qian, YiXing, Xu, ShengYao, Yang, ZhenYu, Lu, ZiXing
Format: Article
Language:English
Subjects:
Composite materials
Constitutive models
Cracking (fracturing)
Cyclic loads
Damage accumulation
Elastoplasticity
Engineering
Fiber composites
Interfaces
Interfacial strength
Mathematical models
Mechanical properties
Plastic deformation
Simulation
Transverse loads
Unidirectional composites
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Summary: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.
ISSN:1674-7321
1869-1900
DOI:10.1007/s11431-022-2314-3