APPARATUS FOR INDENTATION TEST INVOLVING MICOM AND EVALUATING METHOD OF RESIDUAL STRESS USING THE SAME

摘要

PURPOSE: An apparatus for an indentation test with a micom and a method for evaluating residual stress using the same are provided to be used for a large structure by controlling the range of an applied load. CONSTITUTION: An apparatus for an indentation test with a micom comprises an actuator, a slider, a slider guide, an indenter, a load sensor, a displacement sensor, a micom, and a main computer(150). The actuator is installed inside a tester body(110). The slider is connected to a ball screw and a screw nut and comprises a cylinder slid along a rotary shaft. The slider guide is coupled to the tester body and guides the sliding of the slider. The indenter is connected to the slider and applies a load to a test piece. The load sensor measures the load applied to the test piece. The displacement sensor measures the depth that the indenter is inserted into the test piece. The micom is installed inside the tester body and controls the actuator. When the measured values of the load sensor and the displacement sensor exceed a reference value, the main computer stops power supply.