The curvature of unsymmetrical [0/90] laminates moulded from AS4/8552 uni-directional tape has been measured. A linear thermoelastic approach has been applied to predict the related residual stress state before demoulding, giving an estimate of the stress induced by polymerisation strain. The results from the linear approach are confirmed by a viscoelastic finite element model including the cure conversion and related change in viscosity. It is concluded that the curvature measurement of unsymmetrical laminates is an accurate method for the prediction of the transverse residual stress, making it suitable as a benchmark for complex stress modelling.
|Title of host publication||Proceedings of the 14th International conference on Composite Materials, ICCM14|
|Editors||M.J. Martin, H.T. Hahn|
|Place of Publication||San Diego, USA|
|Number of pages||10|
|Publication status||Published - 2003|
|Event||14th International Conference on Composite Materials, ICCM-14, 2003 : Bridging the Gap Between Academia and Industry - San Diego, United States|
Duration: 14 Jul 2003 → 18 Jul 2003
Conference number: 14
|Conference||14th International Conference on Composite Materials, ICCM-14, 2003|
|Period||14/07/03 → 18/07/03|
Wijskamp, S., Akkerman, R., & Lamers, E. A. D. (2003). Residual stresses in non-symmetrical carbon-epoxy laminates. In M. J. Martin, & H. T. Hahn (Eds.), Proceedings of the 14th International conference on Composite Materials, ICCM14 (pp. -). San Diego, USA.