발간논문

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Vol.24, No.10, 1145 ~ 1152, 1986
Title
Measurement of the Fracture toughness by the Unloading Compliance Method Using Precracked Charpy Specimens
한대준Dae June Han, 최순필Sun Pil Choi
Abstract
Special specimen zigs and side grooves were used to prevent the apparent negative crack growth and to measure the crack length correctly in the 3-point bend J_(1C) test using unloading compliance method. All the specimens were Chapy impact types made of SA 533 B 1 steels, and the loading-unloading process was accomplished by the computer controlled MTS. The initial crack length and the crack growth could be measured within the error of 3% and 12% respectively. The apparent negative crack growth could be prevented to use the special specimen zigs and side grooves.
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