Abstract
In the previous study, the effect of strain rate on the micro-indentation (load-displacement relation) has clarified. Therefore, we develop the method for evaluation of the strain rate dependence of materials using the load-displacement relation. First, the relationship between the material constants for Cowper-Symonds constitutive equation (dynamic constants) and the loading curvature was constructed by the response surface, and then the dynamic constants were determined using the inverse analysis. It was confirmed that the dynamic constants could be obtained by substituting the result of the micro-indentation for unknown material into the response surface. By using this method, it is possible to evaluate the strain rate dependence of materials.
