Dynamic tensile intralaminar fracture and continuum damage evolution of 2D woven composite laminates at high loading rate

Rui He, Yidi Gao, Longfei Cheng, Wencheng Liu, Hao Cui, Tao Suo

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摘要

The intralaminar tensile failure of 2D woven composites under dynamic tensile load was investigated in this paper. Compact tension samples were tested at high loading rate with an electromagnetic Hopkinson bar system. The strain field was obtained with high-speed imaging and digital image correlation, and the J-integral method was employed to obtain the fracture toughness and corresponding R-curve. The continuum damage evolution of intralaminar failure was then analyzed by tracking the opening near the initial crack tip. It is found that the dynamic intralaminar fracture toughness is decreased by 51% compared to the quasi-static condition, the continuum damage evolution and its dependence on loading rate have been reported as well. The failure mechanisms were studied with thermal imaging and scanned electron microscopy, shorter fibre pull-out length and thinner failure process zone may be responsible for the reduced toughness at high loading rate.

源语言英语
文章编号104731
期刊Theoretical and Applied Fracture Mechanics
134
DOI
出版状态已出版 - 12月 2024

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