标题：Experimental and computational study of multidirectional glass/epoxy laminates subjected to multiaxial loading
作者：Laux, Tobias ;Gan, Khong Wui ;Dulieu-Barton, Janice M. ;Thomsen, Ole Thybo
作者机构：[Laux, Tobias ;Gan, Khong Wui ;Dulieu-Barton, Janice M. ;Thomsen, Ole Thybo ] Faculty of Engineering and the Environment, University of Southampton, H 更多
会议名称：18th European Conference on Composite Materials, ECCM 2018
会议日期：June 24, 2018 - June 28, 2018
来源：ECCM 2018 - 18th European Conference on Composite Materials
摘要：A nonlinear constitutive model based on non-associative plasticity for unidirectional (UD) composites subjected to multiaxial in-plane loading is proposed. The model can be calibrated using a relatively simple biaxial experiment based on a novel Modified Arcan Fixture (MAF) and Digital Image Correlation (DIC). The 'plasticity' model accounts for the cumulated nonlinear effects arising from plasticity in the resin, micro cracking and geometric nonlinearity. The UD composite is assumed to be transversely isotropic with negligible nonlinearity in the fibre direction. A Drucker-Prager type yield function is used to account for the nonlinear, pressure dependent response in transverse and shear loading and a non-associative flow rule is proposed. Model predictions show good agreement with nonlinear experimental transverse and shear stress-strain curves. Thus, the model can be used to analyse the nonlinear stress/strain states in a multidirectional laminate made from UD composites.
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