Paper number 817

FREE EDGE DELAMINATION ONSET CRITERION

G. MARION¹,²,³ R. HARRY² and F. LECUYER¹

1MEDYSYS , 29 rue J. Rostand, 91873 ORSAY CEDEX, FRANCE
2Laboratoire de Génie Mécanique, IUT Bordeaux I, 33405 TALENCE CEDEX, FRANCE
3BERTIN & Cie, 59 rue P. Curie, 78373 PLAISIR, FRANCE

Summary

This paper shows the results of a theoretical and experimental study of the free edge delamination on carbon-epoxy laminates. Edge delamination tests have been made on different stacking sequences to make specimens delaminate under various modes (interlaminar tension, shear or combinations of the two). The tests give results which are necessary to validate a criterion. The thickness influence on the delamination onset stress is used to identify the parameter of the criterion. This method provides good results for the shear delamination. One set of parameters is sufficient to predict the onset delamination stress for 10, 20 and 30°.

Keywords

laminate, delamination onset, criterion, edge delamination test.