다양한 충돌 속도에 따른 초탄성 충격 프로그래머의 거동 방정식의 매개변수에 대한 연구

The structure was needed to generate the shock wave with various shapes in the shock test. The structure mounted between the impactor and testbed was called “ Shock programmer”. Various material was used as the material of the shock programmer. In this paper, hyperelastic material was mainly used as the material of the shock programmer. Stress-strain curve of hyperelastic material was different under the velocity of the impactor. To obtain the S-S curve of the hyperelastic material , the small shock test was performed. The shape of the programmer was cylindrical type. The radius and height of the programmer was 150 mm and 100 mm. The velocity of the impactor was 4, 8, 12 m/s. Using the S-S curve of the hyperelastic material in the programmer under various velocities of the impactor, the parameter of the presented constitutive equation was calculated. The comparison on the characteristics of the hyperelastic material under various velocities of the impactor was performed.