Effects of Prior Aging At 316 C in Argon on Inelastic Deformation Behavior of PMR-15 Polymer At 316 C

<p>The inelastic deformation behavior of PMR-15 neat resin a high-temperature polymer was investigated at 316 C. The experimental program was designed to explore the in-uence of strain rate on tensile loading unloading and strain recovery behaviors. In addition the e ect 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 material exhibits positive nonlinear strain rate sensitivity in monotonic loading and unloading. Early failures occur in the inelastic regime. The recovery of strain at zero stress and creep response are strongly a ected by prior strain rate. The prior strain rate also has a profound in-uence on relaxation behavior. The experimental data were modeled with the Viscoplasticity Based on Overstress (VBO) theory. Additionally the e ects of prior aging at 316 C in argon on the time (rate)-dependent behavior of the PMR-15 polymer were evaluated in a series of strain controlled experiments. Based on experimental results it was stated that the specimens which are subjected to prior aging in argon for more than 50 h exhibit only quasi-linear behavior until failure.</p><p>This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact and remains as true to the original work as possible. Therefore you will see the original copyright references library stamps (as most of these works have been housed in our most important libraries around the world) and other notations in the work.</p><p>This work is in the public domain in the United States of America and possibly other nations. Within the United States you may freely copy and distribute this work as no entity (individual or corporate) has a copyright on the body of the work.</p><p>As a reproduction of a historical artifact this work may contain missing or blurred pages poor pictures errant marks etc. Scholars believe and we concur that this work is important enough to be preserved reproduced and made generally available to the public. We appreciate your support of the preservation process and thank you for being an important part of keeping this knowledge alive and relevant.</p>