UHMWPE fibre-based composites: Prestress-induced enhancement of impact properties

被引：35

作者：

Fazal, Adnan ^{[1
]}

Fancey, Kevin S. ^{[1
]}

机构：

[1] Univ Hull, Sch Engn, Kingston Upon Hull HU6 7RX, N Humberside, England

来源：

COMPOSITES PART B-ENGINEERING | 2014年 / 66卷

关键词：

Polymer-matrix composites (PMCs); Impact behaviour; Mechanical testing; Viscoelasticity; MOLECULAR-WEIGHT POLYETHYLENE; POLYMERIC MATRIX COMPOSITES; HIGH-MODULUS POLYETHYLENE; NYLON 6,6 FIBERS; BEHAVIOR;

D O I：

10.1016/j.compositesb.2014.04.031

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The impact properties of continuous unidirectional UHMWPE fibre-reinforced polyester resin composites have been investigated, to elucidate the effects of prestress on energy absorption characteristics. Prestress within composite samples was produced by subjecting the UHMWPE fibres to a creep load, which was then released prior to moulding. From Charpy impact tests, these viscoelastically prestressed samples absorbed similar to 20% more energy than their control (unstressed) counterparts, with some batches reaching 30-40%. Generally, whether prestress is created through elastic or viscoelastic means, fibre-matrix debonding is regarded as being a major energy absorption mechanism in this type of composite, but this was not evident in the current study. Instead, evidence of debonding at the skin-core interface within the UHMWPE fibres was found, the skin regions possessing lower stiffness and longer term viscoelastic activity. Skin-core debonding appears to have a significant energy absorbing role within the prestressed samples and we believe it is a previously unrecognised mechanism. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：1 / 6

页数：6

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