Patent ID: 8204699
Filing Date: 2012-06-19
Classification: G01N

Abstract:
1. An analyzing apparatus for analyzing strain-stress relation of a test piece by using measurements of the test piece measured by a three-point bending test, the analyzing apparatus comprising: an acquisition unit for acquiring data indicative of displacements with respect to loads applied of the test piece measured by the three-point bending test; a first calculation unit for calculating a first approximate expression of a relation of the displacements with respect to the loads applied in a first area of a load displacement curve based on the acquired data, where the relation is linear so as to determine an elasticity modulus of the test piece; an extraction unit for determining a yield stress value of the test piece by comparing the relation of the displacements with respect to the loads of the test piece with a plurality of reference relations and determining one of the reference relations having a least difference with the relation of the test piece for a friction coefficient of the test piece; and a second calculation unit for calculating a second approximate expression of a relation of stress caused by the loads with respect to the strains caused by the displacements in a second area of the load displacement curve beyond the yield stress value on the basis of the yield stress value, the elasticity modulus, and the measurements in the second area of the load displacement curve.