Exploration of irreversible residual stresses in a carbon/epoxy composite

被引:0
|
作者
Jakobsen, Johnny [1 ]
Shakibapour, Fahimeh [1 ]
机构
[1] Aalborg Univ, Fibigerstr 16, DK-9220 Aalborg, Denmark
关键词
CURE; RELAXATION;
D O I
10.1088/1757-899X/942/1/012018
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Residual stresses in composite material may rise from several sources; difference in thermal straining between fibre and matrix, chemical shrinkage of the matrix material. The presented paper explores an irreversible Eigen-strain in the material which is shown to change and be removed by a thermal treatment above the Tg of the matrix material. This has been observed though TMA measurements of a carbon/epoxy unidirectional sample. The local Eigen-strain is translated into stresses using a visco-elastic constitutive relation. Further exploration indicates that cooling rate influence the generation of residual stresses in the material.
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收藏
页数:7
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