Fatigue life estimation of graphite/epoxy laminates under consideration of delamination growth

✍ Scribed by H. W. Bergmann; R. Prinz

• Publisher: John Wiley and Sons
• Year: 1989
• Tongue: English
• Weight: 931 KB
• Volume: 27
• Category: Article
• ISSN: 0029-5981
• DOI: 10.1002/nme.1620270208

✦ Synopsis

A closed form approach to the assessment of the fatigue life of graphite'epoxy laminates under cyclic tension xornpression loading has been developed. The model is mechanistic and uses cyclic energy release rates for prediction of delamination growth and of critical delamination sizes which induce buckling and the final failure of the laminates. Tests performed with graphitr,'epoxy specimens of stacking order [On, $ m ] s with scvered central plies "$3, and of stacking order [0,.+45, 0,.-45, 0. 901% with a central unloaded hole.

indicate good correlation betwcen estimated values and observed delamination growth, critical buckling strength of separated plies and load cycles to failure.