Extension of Viscoplasticity Based on Overstress to Capture the Effects of Prior Aging on the Time Dependent Deformation Behavior of a High-Temperatur: Experiments and Modeling - Brossura

McClung, Amber J. W.

Brossura

ISBN 10: 1249414814 ISBN 13: 9781249414810

Casa editrice: LIGHTNING SOURCE INC, 2012

Riassunto

The inelastic deformation behavior of PMR-15 neat resin, a high-temperature thermoset polymer, was investigated at 288 degrees C. The experimental program was designed to explore the influence of strain rate on tensile loading, unloading, and strain recovery behaviors. In addition, the effect of the prior strain rate on the relaxation response of the material, as well as on the creep behavior following strain controlled loading were examined. The experimental data were modeled with the Viscoplasticity Based on Overstress (VBO) theory. A systematic procedure for determining model parameters was developed and the model was employed to predict the response of the material under various test histories. Additionally the effects of prior aging at 288 degrees C in argon on the time (rate)-dependent behavior of the PMR-15 polymer were evaluated in a series of strain and load controlled experiments. Based on experimental results, the VBO theory was extended to capture the environmentally induced changes in the material response. Several of the VBO material parameters were expanded as functions of prior aging time. The resulting model was used to predict the high-temperature behavior of the PMR-15 polymer subjected to prior aging of various durations.

Dettagli dell'edizione

• Editore: LIGHTNING SOURCE INC
• Data di pubblicazione: 2012
• Lingua: Inglese
• ISBN 10: 1249414814
• ISBN 13: 9781249414810
• Rilegatura: Copertina flessibile
• Numero di pagine: 220
• Redattore: Air Force Institute Of Technology (U S.
• Contatto del produttore: non disponibile
• Persona responsabile: non disponibile