Acoustic Response and Micro-Damage Mechanism of Fiber Composite Materials under Mode-II Delamination

作者：Zhou Wei; Lv Zhi Hui; Wang Ya Rui; Liu Ran; Chen Wei Ye; Li Xiao Tong

来源：Chinese Physics Letters, 2015, 32(4): 046201.

DOI：10.1088/0256-307X/32/4/046201

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 fiber 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.

• 出版日期2015-4
• 单位河北大学