Experimental investigation of the effect of the mould thermal expansion on the development of internal stresses during carbon fibre composite processing

被引:67
作者
de Oliveira, R. [1 ]
Lavanchy, S. [1 ]
Chatton, R. [2 ]
Costantini, D.
Michaud, V. [1 ]
Salathe, R. [2 ]
Manson, J. -A. E. [1 ]
机构
[1] Ecole Polytech Fed Lausanne, Lab Technol Composites & Polymers LTC, CH-1015 Lausanne, Switzerland
[2] Ecole Polytech Fed Lausanne, APL, CH-1015 Lausanne, Switzerland
关键词
polymer matrix composite; residual/internal stress; process monitoring; autoclave;
D O I
10.1016/j.compositesa.2008.04.011
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The influence of the mould material on the build-up of internal stresses during autoclave cure of carbon fibre composites was investigated using embedded optical fibre Bragg gratings. Unidirectional and cross-ply laminates were cured on four flat moulds: aluminium, steel, carbon composite and carbon foam. From the beginning of cure, the fibres were strained by contact with the expanding mould. The strain increased with the mould thermal expansion and autoclave pressure. As a result, large residual strains were found in the longitudinal direction for the samples cured on aluminium or steel moulds, whereas the samples cured on carbon-based moulds exhibited almost no strain after cooling-down. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1083 / 1090
页数:8
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