Research on the influence of hygro-thermal effects on matrix-dominated mechanical properties of T800S/M21 CFRP composites

doi:10.19936/j.cnki.2096-8000.20240528.014

Abstract

Abstract: This work studies the hygro-thermal effects on matrix-dominated mechanical properties of T800S/M21 CFRP laminates. Experimental tests are performed on 90°and ±45° laminate test coupons to investigate the hygro-thermal effects on matrix dominated tension and shear mechanical behaviors. Laminate interface properties under fracture mode Ⅰ and mode Ⅱ considering different hygro-thermal conditions are evaluated by DCB and ENF tests. Based on ±45° tension test, crack density on specimen edge is measured to support the analysis of shear modulus degradation and crack density evolution under different moisture absorption conditions. In conclusion: Hygro-thermal conditions show significant effects on matrix dominated in-plane and interface properties. The nonlinear response of in-plane shear is strongly dependent on hygro-thermal conditions. Test results show that moisture absorption accelerates the crack density evolution and shear modulus degradation, and moisture content plays an important role in the contribution of crack density to the shear modulus reduction.

Key words: CFRP composite, in-plane shear performance, hygro-thermal effects, damage mechanism

CLC Number:

TB332

CHEN Cheng, LI Chen, WANG Yan, GAO Limin, XU Jifeng. Research on the influence of hygro-thermal effects on matrix-dominated mechanical properties of T800S/M21 CFRP composites[J]. COMPOSITES SCIENCE AND ENGINEERING, 2024, 0(5): 100-106.

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