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Realizing the accurate characterization for the dynamic damage process is a great challenge.Here we carry out testing simultaneously for dynamic monitoring and acoustic emission(AE)statistical analysis towards Bber composites under mode-Ⅱdelamination damage.The load curve,AE relative energy,amplitude distribution,and amplitude spectrum are obtained and the delamination damage mechanism of the composites is investigated by the microscopic observation of a fractured specimen.The results show that the micro-damage accumulation around the crack tip region has a great effect on the evolutionary process of delamination.AE characteristics and amplitude spectrum represent the damage and the physical mechanism originating from the hierarchical microstructure.Our finding provides a novel and feasible strategy to simultaneously evaluate the dynamic response and micro-damage mechanism for fiber composites.
Realizing the accurate characterization for the dynamic damage process is a great challenge. Here we carry out testing for dynamic monitoring and acoustic emission (AE) statistical analysis towards Bber composites under mode-II delamination damage. The load curve, AE relative energy, amplitude distribution , and amplitude spectrum are obtained and the delamination damage mechanism of the composites is investigated by the microscopic observation of a fractured specimen. the results show that the micro-damage accumulation around the crack tip region has a great effect on the evolutionary process of delamination. AE characteristics and amplitude spectrum represent the damage and the physical mechanism originating from the hierarchical microstructure. Our finding provides a novel and feasible strategy to simultaneously evaluate the dynamic response and micro-damage mechanism for fiber composites.