MEASUREMENT APPARATUS FOR PERFORMING INDENTATION/CREEP TEST, TESTING METHOD, PHYSICAL PROPERTY EVALUATION PROGRAM, AND RECORDING MEDIUM IN WHICH PHYSICAL PROPERTY EVALUATION PROGRAM IS RECORDED.

摘要

A measurement apparatus for carrying out an indentation creep test on a specimen, including a measurement control apparatus that includes a load measurement device configured to measure a load, a constant-load compression device configured to compress a tip of a transparent indenter to a surface of the specimen, and an image capturing device configured to optically capture an image including a contact area portion which is a part of the specimen to which the load is applied by the constant-load compression device; and including an information processing apparatus that includes an image analysis unit configured to analyze a contact area, and a physical property value calculation unit. The physical property value calculation unit includes a first calculation unit configured to subtract a plastic contact area to be obtained analytically from the contact area so as to calculate a viscoelastic contact area, a second calculation unit configured to calculate contact stress based on the viscoelastic contact area and the constant load value, and a third calculation unit configured to calculate a contact strain rate based on the viscoelastic contact area, the physical property value calculation unit being configured to conduct linear regression with respect to a plot of a logarithmic value of the contact stress and a logarithmic value of the contact strain rate so as to determine a creep index n and creep constant k. Accordingly, it is possible to evaluate a creep index n and a creep constant k, which are creep physical property values, simultaneously, easily, and quickly.