Modelling the viscoelastic stress relaxation of glass fibre reinforcements under constant compaction strain during composites manufacturing

被引:48
|
作者
Somashekar, A. A. [1 ]
Bickerton, S. [1 ]
Bhattacharyya, D. [1 ]
机构
[1] Univ Auckland, Dept Mech Engn, Ctr Adv Composite Mat, Auckland 1142, New Zealand
关键词
Glass fibres; Stress relaxation; Analytical modelling; Maxwell element-based model; COMPRESSION DEFORMATION; BEHAVIOR; DRY; PREFORMS;
D O I
10.1016/j.compositesa.2012.02.004
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Viscoelastic stress relaxation of glass fibre reinforcements is commonly encountered in the manufacture of glass fibre reinforced polymer composites. A better understanding of the phenomenon, coupled with an ability to predict this behaviour, will aid improved manufacturing process control and tooling design. Finished product quality may also be bettered by virtue of increased knowledge of stresses acting within the composite product. This paper presents a simple Maxwell element-based model to both simulate and help explain the viscoelastic stress relaxation of glass fibre reinforcements under compressive strain compaction of layers during composites manufacturing. The model was validated against experimental data for reinforcement materials of different architecture, and good-to-reasonable predictions of the stress relaxation response were obtained. (C) 2012 Elsevier Ltd. All rights reserved.
引用
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页码:1044 / 1052
页数:9
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