关键词: 复合材料, 玻-碳混杂, 开孔拉伸, 高速摄像, 力学行为

Abstract:

The carbon/glass hybrid effect causes more complex mechanical responses at the interfaces during the tensile process of composites. In order to study the effect of carbon/glass hybridization on the interlaminar properties， two kinds of specimens， bonded and unbonded， were designed and fabricated， and the tensile mechanical behavior of open-hole was studied. First， using strain gauges and high-speed cameras， we monitored the loading process and the mechanical behavior of the materials at the moment of failure. Subsequently， finite element simulation was used to calculate the interlayer stress. Finally， through theoretical modeling， the interlaminar stress was numerically derived. The results show that there are stresses σ₃， τ₁₃ and τ₂₃ in the adhesive layer during the loading process， but according to the strain acquisition and simulation calculation results， the values are lower than the interlaminar strength. After the specimen damages， destruction of part of the material will rebound. The resilience force is linearly related to the elastic modulus and the maximum failure strain of the material， and is greater than the maximum shear stress between layers， which is the main reason for the delamination failure of the material.

Key words: composite materials, carbon/glass hybrid, open-hole tension, high-speed cameras, mechanical behavior