| 摘要 |
PROBLEM TO BE SOLVED: To provide a fatigue test device which has high measurement accuracy of elongation of a test object even when the test object is displaced in a second direction in a fatigue test.SOLUTION: A fatigue test device includes: loading means which applies a tensile/compressive load to a test object in a first direction; an elongation measurement unit which is brought into contact with the test object in a second direction crossing the first direction; a first jig 81 fixed to the elongation measurement unit; a second jig 82 which is brought into contact with the first jig 81 in the first direction; a spring member 84 which is interposed between the first jig 81 and the second jig 82 and urges the second jig 82 relative to the first jig 81 in the first direction; and a displacement detection unit which is connected to the second jig 82 to detect displacement of the second jig 82. Both end parts of the spring member 84 are connected to the first jig 81 and the second jig 82 respectively so as to be relatively immobile in the second direction. |
