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所属单位：航空学院

发表刊物：POLYMER TESTING

关键字：Mechanical properties Unidirectional composites Woven fabric composites Off-axis tension Tsai-Wu criterion

摘要：Mechanical properties of unidirectional (UD) and woven fabric glass/epoxy composites under off-axis tensile loading were experimentally investigated. A number of off-axis tests considering different fibre orientations were performed to study the character and failure mechanisms of the composite laminates. The experimental results indicated that both off-axis elastic moduli and strength degrade with increasing off-axis angle in all cases, and the woven fabric composites present nonlinear stress-strain behaviour under off-axial tension loading. The Tsai-Wu criteria used for failure analysis of the UD and woven fabric composites were compared and discussed, especially considering different values of interaction coefficient F-12. The prediction results demonstrated that the Tsai-Wu criterion can be used successfully to analyse failure properties of the woven fabric composites under multiaxial stress conditions, where the criterion with the modified coefficient F-12 obtained from the 45 off-axial tension tests is better and has higher accuracy. Finally, the specific failure modes were compared in the UD and woven fabric composites. The selected fracture surfaces were also observed by scanning electron microscopy (SEM), and the corresponding failure mechanisms of the woven fabric composites under off-axis tensile loading were identified. (C) 2016 Elsevier Ltd. All rights reserved.

ISSN号：0142-9418

是否译文：否

发表时间：2017-04-01

合写作者：Cai, Deng'an,Wang, Xiaopei,Li, Chao,Deng, Jian

通讯作者：周光明