4.7 Article

Experimental investigation on mechanical properties of unidirectional and woven fabric glass/epoxy composites under off-axis tensile loading

期刊

POLYMER TESTING
卷 58, 期 -, 页码 142-152

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.polymertesting.2016.12.023

关键词

Mechanical properties; Unidirectional composites; Woven fabric composites; Off-axis tension; Tsai-Wu criterion

资金

  1. Jiangsu Innovation Program for Graduate Education [KYLX_0222]
  2. Fundamental Research Funds for the Central Universities
  3. Priority Academic Program Development of Jiangsu Higher Education Institutions

向作者/读者索取更多资源

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.

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