CURING PROCESS INDUCED VISCOELASTIC RESIDUAL STRESSES IN POLYMER MATRIX LAMINATED COMPOSITES

摘要

Residual stresses and deformations during cure are evaluated on the basis of chemo-thermo-viscoelastic finite element analysis with material properties dependent on both temperature and degree of cure. The chemo-thermorheologically complex constitutive relations of thermosetting resins during curing processes developed in the authors' previous study have been utilized to describe behavior of resins. Of particular interest are interlaminar stresses possibly causing delamination during cure cycles. Stress singularities near the free edge of laminates are also predicted.