A numerical procedure for predicting creep and delayed failures in laminated compositesA numerical procedure is described for predicting the viscoelastic response of general laminates. A nonlinear compliance model is used to predict the creep response of the individual laminae. A biaxial delayed failure model predicts ply failure. The numerical procedure, based on lamination theory, increases by increments through time to predict creep compliance and delayed failures in laminates. Numerical stability problems and experimental verification are discussed. Although the program has been quite successful in predicting creep of general laminates, the assumptions associated with lamination theory have resulted in erroneous bounds on the predicted material response. Delayed failure predictions have been conservative. Several improvements are suggested to increase the accuracy of the procedure.
Document ID
19840042091
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Dillard, D. A. (Missouri-Rolla, University Rolla, MO, United States)
Brinson, H. F. (Virginia Polytechnic Institute and State University Blacksburg, VA, United States)