Paper number 1160
|RESIDUAL STRESS DISTRIBUTION AND ITS INFLUENCE ON THE MECHANICAL BEHAVIOUR OF COMPOSITE LAMINATES|
GONG X.Lu1, CHEROUAT A.1, GONG X.Jing2 and LU Jian1
1LASMIS, GSM, Université de Technologie de Troyes (UTT) 12, rue Marie Curie, B.P.2060, 10010 Troyes France
2LRMT, ISAT, 49, rue Mlle. Bourgeois, 58000 Nevers France
|Summary||The objective of this study is to investigate the influence of residual stresses due to fabrication conditions on the mechanical behavior of laminate structure. Firstly, we have fabricated the laminate [02 /902]s from unidirectional carbon/epoxy prepreg (T300/914) with three different cooling conditions ( fast, normal and slow ). And then the residual stress distribution in laminates was measured by using the incremental hole-drilling method and was calculated by a finite element model. Finally, specimens cut from these laminates were tested in tension test to obtain their tension strength. It is showed that cooling condition in forming process plays an important part in residual stress distribution in laminates. The latter has to be taken into account for strength prediction of laminate structures.
||Keywords|| residual stress, forming process, mechanical behaviour, finite element analysis.
Theme : Mechanical and Physical Properties ; Fracture Mechanics and Failure
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