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        A New Interfacial Model for Transverse Mechanical Properties of Unidirectional Fiber Reinforced Composites

        Deng’an Cai,Xiaopei Wang,Yaohui Shi,Xufeng Hao,Yuan Qian,Guangming Zhou 한국섬유공학회 2021 Fibers and polymers Vol.22 No.2

        Transverse mechanical properties play an important role in the study of fiber reinforced composite materials. Anexperimental and numerical study on mechanical properties and damage behavior of unidirectional fiber reinforcedcomposites under transverse load is presented. The quasi-static tensile and compressive tests were carried out to obtainmechanical properties of unidirectional fiber reinforced composites under transverse tension and compression. The fracturemorphologies of the specimens were observed by scanning electron microscopy (SEM) to reveal their distinct damagemechanism. Considering the effects of interface, a new interfacial model is proposed. Two representative volume elements(RVEs) of basic and interfacial models are established for comparison analysis. The predicted results agree well with theexperimental data. The introduction of interfacial layer has little effect on the prediction of transverse modulus, but canimprove the accuracy of the predicted transverse strength. The fiber volume fraction has a great influence on the transversemechanical properties of unidirectional fiber reinforced composites. As the fiber volume fraction increases, its transversemodulus increases, but both the transverse strength and the ultimate strain decrease.

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