抄録
The distribution of contact pressure on the surfaces of a crack in a ceramic specimen is estimated by a 3D finite element inverse analysis. The strains generated by the introduction of a crack are measured with strain gages on a side of a specimen, and this datum is used as the input to the inverse analysis. To reduce the number of parameters to be determined, the microscopic deformation characteristics related to the surface roughness are modeled by a non-linear spring with two parameters. After identifying these two parameters, the contact pressure distribution is calculated by a direct analysis. In order to save the computational time, the effective method which makes the system of equations small is developed. This method is applicable to a wide range of inverse problems.
