Journal of Polymer Science Part B Polymer Physics · 1990 · 52 citations · 8 references
EngineeringMaterials EngineeringMaterials ScienceAgingMechanical Behavior Of MaterialsRheologyAging EffectsCreep BehaviorFailure CriteriaMaterial DegradationPlastic DeformationStress-strain BehaviorAging Temperature EffectsCreep AgingCreep FailureCreep RuptureCreep Strain RateMaterial AgingPhysical AgingStress Correspondence
Abstract Samples of PMMA were aged at 80°C for between 1 h and 254 days and tested in creep in uniaxial extension at large stresses and at room temperature. Both chemical and physical aging effects were found to be important in determining the failure behavior of the samples. This behavior was found to be describable within the context of a commonly used failure criterion that the time to failure multiplied by the strain rate at failure is constant. The creep behavior was found to follow classical time–aging time and time–stress correspondence principles.
8
Melvin F. Kanninen, C. H. Popelar, A. J. McEvily · Journal of Engineering Materials and Technology · 1986 · 522 citations · Full text