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이억섭,김선용,홍성경,Lee, O.S.,Kim, S.Y.,Hong, S.K. 한국정밀공학회 1995 한국정밀공학회지 Vol.12 No.12
This investigation evaluates dynamic fracture characteristics of two alloy steels (STD-11 and STS-3) and a gray cast iron (GC-30). The dynamic fracture toughness of crack initiation and some of the dynamic fracturing characteristics were evaluated by using the instrumented Charpy impact testing procedures. It was found from experimental results for three kinds of materials that inertia force is directly proportional to impact velocity. The duration time of inertia force was found to be constant regardless of impact velocities in steel specimens.