Failure analysis of plain woven glass/epoxy laminates: Comparison of off-axis and biaxial tension loadings
journal contributionposted on 19.05.2017, 09:00 by Deng'an Cai, Ju Tang, Guangming Zhou, Xiaopei Wang, Chao Li, Vadim SilberschmidtVadim Silberschmidt
© 2017 Elsevier Ltd An experimental study was focused on investigation of the failure properties of plain woven glass/epoxy composites under off-axis and biaxial tension loading conditions. Four fibre orientations (0°, 15°, 30° and 45° with respect to the load direction) were considered for off-axis tests and two biaxial load ratios for biaxial tests to study failure characteristics and mechanism. Four classical polynomial failure criteria - Tsai-Hill, Hoffman, Tsai-Wu and Yeh-Stratton - were analysed comparatively to predict off-axis and biaxial failure strength of the composites. For failure prediction of the plain woven composites under multiaxial tension loads, the Tsai-Wu criterion was modified by introducing an interaction coefficient F12 obtained from 45° off-axis or biaxial tension tests and the Yeh-Stratton criterion was modified with the interaction coefficient B12 = 0 or obtained from the biaxial tension test. The former criterion was found to have higher accuracy. Finally, according to macroscopic and microscopic studies, the failed specimens showed mostly distinct failure with a specific fracture orientation, mainly exhibiting fibre or fabric tensile fracture mode and a combination of matrix cracking and delamination, both in off-axis and cruciform samples.
This work was partially supported by the Fundamental Research Funds for the Central Universities, the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) and the Funding of Jiangsu Innovation Program for Graduate Education (Grant No. KYLX_0222)
- Mechanical, Electrical and Manufacturing Engineering