PROBLEM TO BE SOLVED: To provide a strain control type super-high cycle fatigue testing method and a fatigue testing apparatus therefor, which can carry out a super-high cycle fatigue test for a short period of time.;SOLUTION: The testing method comprises; a first step of setting at least a control velocity f and the total strain range Δεt across referring points of a test piece 1; a second step of obtaining a target control range ΔLt of a noncontact type displacement gauge 20 corresponding to the set value of the total strain range across the referring points of the test piece; and a third step of executing a fatigue test under a strain control of the noncontact type displacement gauge while repeatedly applying loads on the test piece at the control velocity f such that the amplitude of a measurement value of the noncontact type displacement gauge is kept constant within the target control range ΔLt. In the second step, a measurement value of the noncontact type displacement gauge and a measurement value of a contact type strain gauge 10 are acquired while repeatedly applying the loads on the test piece at a strain velocity at which the contact type strain gauge can follow motions, and a correlation between both gauges is obtained from those measurement values, and the target control range ΔLt is obtained based on the correlation.;COPYRIGHT: (C)2007,JPO&INPIT
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