期刊
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
卷 69, 期 -, 页码 208-218出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2014.11.022
关键词
Fibres; Plastic deformation; Adhesion; Mechanical testing
In this study we investigate the tensile behaviour of unidirectional and cross-ply composites reinforced with ductile stainless steel fibres and modified adhesion to the epoxy matrix. Results show that annealed stainless steel fibres have a potential in designing tough polymer composites for structural applications. The stiffness of the UD composites made from these fibres is 77GPa combined with the strain-to-failure between 15% and 18% depending on the level of adhesion. Silane treatments were used to modify the adhesion. By treating the stainless steel fibres with different silane coupling agents, an increase of 50% in the transverse 3-point-bending strength was realised. Increasing the adhesion by 50% leads to a higher tensile strength and strain-to-failure in both UD and cross-ply laminates and a higher in-situ strength of the 90 degrees plies. It also delays formation of matrix cracks and hinders growth of debonding. (C) 2014 Elsevier Ltd. All rights reserved.
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