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논문 기본 정보

자료유형
학술대회자료
저자정보
저널정보
대한기계학회 대한기계학회 춘추학술대회 대한기계학회 2008년도 재료 및 파괴부문 춘계학술대회 강연 및 논문집
발행연도
2008.5
수록면
344 - 365 (22page)

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초록· 키워드

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In this study, a cohesive element approach is introduced to get a better understanding of the ballistic impact and contact phenomena of structures. To simulate the ballistic impact problem, this study considers two contact schemes for un-cracked elements and cracked elements between the projectile and the target. In the first contact algorithm, a simple contact methodology is applied to represent the un-cracked elements of target and projectile structures during the contact phenomena. With a various impact and contact models, the un-cracked contact phenomena are valuated. Within the second contact approach, the concept of cohesive zone modeling is introduced to depict cracks or fragmentation problems related to the brittle material impact, and also a simple application for contact algorithms is considered to depict post-rupture cracks and post-rupture crack surfaces during the impact and contact processing. To simulate the high velocity impact and the penetration phenomena, the finite element method and the cohesive element method based on a simple erosion contact algorithm and a discontinuous cracking scheme are introduced. For the effect of mesh sensitivity, this study implements various mesh sizes of target structures, and then different dynamic behavior of structures subjected to ballistic impact loading are suggested. Finally, the comparisons of the present predictions with other available ones are carried out, and the excellent agreement is reported.

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Abstract
1. Introduction
2. Computational Methodology
3. Numerical Examples for Contact/Impact Problems
4. Summary
Reference

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