Abstract
Stress estimation method using the dynamic hardness testing was analytically investigated. The FEM stress analysis was performed by the ABAQUS code in two-dimensional plain-strain condition taking into account of the material non-linearity with surface element. The Vickers indentor made of diamond was modeled as a rigid body in the analysis. The indentor was pressed on the body with several kinds of pre-stressed conditions in tension and compression to clarify the detectability of the stress (strain) condition by the dynamic hardness testing. The obtained dynamic hardness was compared with experimental data as a function of pre-stressed condition. From this study, it was found that the dynamic hardness increases with increasing compressive pre-stressed condition and decreases with increasing tensile pre-stressed condition. Therefore, it is concluded that the dynamic hardness testing aiming at the stress measurement is applicable to the measurement of complex stress profile with tensile and compressive stresses.
