Ductile matrix composites undergo plastic deformation even at low stress levels. In this paper the elastoplastic behaviour of APC2 (AS4/PEEK) laminas is studied by means of a one-parameter plastic potential. The extension to laminates of constitutive relations that are based on this yield function is examined; a comparison is made between experimental data and numerical results obtained by integrating the elastoplastic relations for various stacking sequences monotonically loaded. Results are also shown regarding notched strength prediction of angle-ply laminates with a circular hole, based on an elastoplastic behaviour assumption.
Elastoplastic Behaviour of Composite Laminates
MEILI, SILVIA;
1998-01-01
Abstract
Ductile matrix composites undergo plastic deformation even at low stress levels. In this paper the elastoplastic behaviour of APC2 (AS4/PEEK) laminas is studied by means of a one-parameter plastic potential. The extension to laminates of constitutive relations that are based on this yield function is examined; a comparison is made between experimental data and numerical results obtained by integrating the elastoplastic relations for various stacking sequences monotonically loaded. Results are also shown regarding notched strength prediction of angle-ply laminates with a circular hole, based on an elastoplastic behaviour assumption.
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