Study on nonlinear ultrasonic detection of low-speed impact damage of carbon fiber woven composite

doi:10.19936/j.cnki.2096-8000.20230528.014

Abstract

Abstract: In order to study the low-speed impact damage of carbon fiber epoxy matrix plain weave woven composites, an integrated finite element model of low-speed impact and ultrasonic detection was established. Based on the asymptotic homogenization method, the real meso-cell model of plain weave composites was constructed. Based on the three-dimensional Hashin failure criterion, the low-velocity impact damage of the extended macro composite plate model at different impact energies was numerically simulated. The nonlinear response of ultrasonic Lamb wave to the damaged area is used to evaluate the damage inside the material. Ram-5000 SNAP nonlinear ultrasonic testing system was used to test the test samples with different impact energies. The simulation results were compared, and the results showed that the integrated model was effective and feasible. Ultrasonic Lamb wave can be used to detect the impact damage of woven materials. The amplitude of second harmonic and relative quadratic nonlinear coefficient increase with the increase of impact energy.

Key words: plain weave woven composites, low speed impact, nonlinear ultrasound detection, Lamb wave, the coefficient of nonlinearity

CLC Number:

TB332

CHENG Zhenfeng, JIA Kangkang, LI Cheng. Study on nonlinear ultrasonic detection of low-speed impact damage of carbon fiber woven composite[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(5): 94-101.

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