Mechanical properties of unidirectional hybrid carbon fiber reinforced composites under three-point bending load

doi:10.19936/j.cnki.2096-8000.20230328.018

Abstract

Abstract: We have adopted T1100GC together with M55J carbon fibers as prepregs to fabricate a series of the unidirectional hybrid carbon fiber reinforced composite (HCFRP) laminates via molding method. By changing the hybrid ratio and layup methods of HCFRP, the bending properties of HCFRP have been investigated via three-point bending test, and optical microscope has been utilized to analyze their failure mode under bending loads. Our results indicate that both pristine T1100GC and M55J carbon fiber composites suffer from compression failure. The destroying of type B hybrid structures in HCFRP is mainly due to shearing failure in the middle layer, the failure mode of the HCFRP in type C is related to the hybrid ratio. HCFRP with the hybrid ratio of 47.1% exhibits the best bending properties regardless of layup methods. The flexural strength of HCFRP with M55J carbon fiber in the middle layer reaches the highest value of 2 052.7 MPa, and its failure mode is overall failure. In addition, the flexural elasticity modulus of HCFRP with T1100GC carbon fiber in the middle layer reaches the highest value of 310.5 GPa, and its failure mode is delamination failure.

Key words: hybrid composites, carbon fiber, bending properties, failure mode

CLC Number:

TB332

ZHOU Juping, LI Peng, WANG Yichao. Mechanical properties of unidirectional hybrid carbon fiber reinforced composites under three-point bending load[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(3): 112-119.

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