| 제목 |
동적무기력계수에 의한 고장력강의 동적·충격강도 특성 평가 |
| 분야 |
차체 및 구조 안전 |
| 언어 |
Korean |
| 저자 |
양성모(전북대학교), 강희용(전북대학교), 박정민(전북대학교), 송준혁(전북대학교), 채희창(전북대학교) |
| Key Words |
Dynamic lethargy coefficient(동적무기력계수), Tensile test(인장시험), Dynamic/Impact tensile strength(동적/충격 인장강도), High tensile steel(공장력강), Loading speed(하중속도) |
| 초록 |
The purpose of this paper is presented a rational method of predicting dynamic/impact tensile strength of high tensile steel materials widely used for structural material of automobiles. It is known that the ultimate strength is related with the loading speed and the Lethargy Coefficient from the tensile test. The Dynamic Lethargy Coefficient is proportional to the disorientation of the molecular structure and indicates the magnitude of defects resulting from the probability of breaking the bonds responsible for its strength. The coefficient is obtained from the simple tensile test such as failure time and stresses at fracture. These factors not only affect the static strength hut also have a great influence on the dynamic/impact characteristics of the joint and the adjacent structures. This strength is used to analyze the failure life prediction of mechanical system by virtue of its material fracture. The impact tensile test is performed to evaluate the life parameters due to loading speed with the proposed method. Also the evaluation of the dynamic/impact effect on the material tensile strength characteristics is compared with the result of Campbell-Cooper equation to verify the proposed method. |
| 원문(PDF) |
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