Predictions of Tensile Behavior and Strengths of a Si3N4 Ceramic at High Temperatures Based on a Viscoplastic Model
Author:
Liu K. C.1, Brinkman C. R.1, Ding J.-L.2, Lin S.-B.2
Affiliation:
1. Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 2. Department of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164
Abstract
Tensile deformation and rupture behavior were simulated using a viscoplastic model developed recently. The model was formulated based on the state variable approach, which provides flexibility and versatility for characterizing the time-dependent behavior of ceramic materials under general thermomechanical loading conditions. Simulations portrayed by the model were compared with experimental tensile data obtained under two different tensile stressing rates. Results showed that the model was capable of simulating deformation behavior for all practical engineering purposes, but estimated high-temperature fracture strengths somewhat conservatively.
Publisher
ASME International
Subject
Mechanical Engineering,Energy Engineering and Power Technology,Aerospace Engineering,Fuel Technology,Nuclear Energy and Engineering
Reference8 articles.
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