COMPOSITES SCIENCE AND ENGINEERING ›› 2024, Vol. 0 ›› Issue (12): 19-25.DOI: 10.19936/j.cnki.2096-8000.20241228.003

• BASIC STUDY • Previous Articles     Next Articles

Study on tensile and compression failure behavior of ultra-thin-ply carbon fiber reinforced composite panel

LIU Yanpeng1, HAN Yuze1, REN Zhongjie1, REN Mingfa2*   

  1. 1. Department of Engineering Mechanics, Dalian University of Technology, Dalian 116024, China;
    2. School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
  • Received:2023-11-28 Online:2024-12-28 Published:2025-01-14

Abstract: The thinning of carbon fiber reinforced composites has further improved their mechanical properties and design space. In order to investigate the basic mechanical properties and failure mechanism of ultra-thin-ply carbon fiber reinforced composites, unidirectional composites with four ply thicknesses of 24 μm, 55 μm, 75 μm and 100 μm were prepared and subjected to longitudinal tensile, transverse tensile, longitudinal compressive, and transverse compressive experiments. Analysis was conducted on the influence of ply thickness on the modulus and strength of carbon fiber reinforced composites, revealing the failure modes and mechanisms of unidirectional carbon fiber reinforced composites with different ply thicknesses. The results indicate that the influence of ply thickness on the longitudinal tensile strength, transverse tensile strength, longitudinal compressive modulus and transverse compressive modulus of carbon fiber reinforced composites is not monotonic. Proper ply thickness can enable the composite to exhibit the best mechanical properties. Furthermore, the thickness of the ply also has a significant impact on the failure mode of the unidirectional carbon fiber reinforced composites, mainly manifested in the degree of transverse splitting, fiber fracture, delamination, and crack initiation and propagation mode.

Key words: ultra-thin-ply carbon fiber reinforced composites, ply thickness, unidirectional composites, failure behavior, mechanical properties

CLC Number: