Experimental investigation on the impact resistance and damage mechanism of carbon/glass unidirectional and woven hybrid laminates
Yingming Wang, Wenqin Han, Kejun Hu, Yingxiao Zheng
Abstract
Abstract The mechanical properties of hybrid fiber composite laminates are affected by the hybrid ratio as well as the stacking sequences, to investigate the effect. In this paper, the effects of the hybrid ratio and stacking sequences on the impact resistance and residual compression properties of carbon/glass unidirectional and woven hybrid laminates are investigated. The use of acoustic emission technology enables the real‐time monitoring of the impact and compression damage processes of carbon/glass composite laminates with varying hybrid ratios and stacking sequences, thereby facilitating the elucidation of the underlying failure mechanisms and the evolution of the laminates. The findings indicated that laminates with symmetrical stacking demonstrated superior impact resistance, resilience, and residual compression properties compared to those with asymmetrical stacking when subjected to high‐energy impact. Sandwich stackings demonstrate superior energy absorption properties relative to alternate‐stacking laminates, although they exhibit diminished residual compression properties. The impact resistance of laminates with a high carbon content under a sandwich stacking sequence is poor. In the context of alternating symmetric stacking, the impact resistance of the laminate is not significantly influenced by the carbon content. The results of the acoustic emission analysis indicate that the damage is minimized when the stacking sequence is alternating symmetry and the impact side is a woven material. Highlights Enhancing impact resistance of composites through hybrid structure research. Report the optimal parameters of the effects on the impact resistance of the composite. The VMD method is used to determine the percentage of damage types in the laminate.