Host: The Japan Society of Mechanical Engineers
Name : Mechanical Engineering Congress,Japan
Date : September 11, 2016 - September 14, 2016
This study proposes a reverse analysis that can be employed to extract elastoplasticity dependent creep property of metallic materials from instrumented indentation with two sharp indenters. First, the creep deformation that obeys the Norton's law ( ε = Aσn ) is studied and the dimensional function is established to determine parameters of A and n from two indentation experiments conducted with different sharp indenters. Then, the developed numerical algorithm is extended to extract the elastoplasticity of various metallic materials by focusing on the loading stage of indentation experiments. By considering the full loading history with both linear increase and holding stages of loads, we propose a framework of reverse analysis to determine both elastoplasticity and creep properties simultaneously. In parallel, indentation experiments on several metallic materials are performed and the results agree well with our predictions.
