KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)
- Volume 7 Issue 1
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- Pages.75-82
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- 1987
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- 1015-6348(pISSN)
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- 2799-9629(eISSN)
Elasto-Plastic Analysis for J-integral Evaluation of Unstable Fracture in Cracked Ductile Materials
균열재(龜裂材)의 불안정연성파괴(不安定延性破壞)에 대한 J 적분(J積分) 평가(評價)를 위한 탄소성해석(彈塑性解析)
- Received : 1987.02.04
- Published : 1987.03.31
Abstract
It is the objective of this study to estimate J-integral by numerical analysis, in which J-integral as aparameters in fracture mechanics can be used to evaluate unstable ductile fracture which is a important problem with respect to structural stability when the scope is beyond small scale yielding criteria. For this, 8-node isoparametric singular element as crack tip element of a cracked material was used to solve plastic blunting phenomenon at crack tip, and crack opening was forced to start when J-value was exceeding fracture toughness
본(本) 연구(硏究)는 소규모강복범위(小規模降伏範圍)를 벗어나는 대규모강복조건하(大規模降伏條件下)에서 구조안정성(構造安定性)에 관(關)한 중요(重要)한 문제(問題)인 불안정연성파괴(不安定延性破壞)를 평가(評價)할 수 있는 파괴역학인자(破壞力學因子)로서의 J 적분(積分)을 수치해(數値解)로서 구하는데 그 목적(目的)을 두었다. 이를 위해 균열재(龜裂材)의 균열선단요소(龜裂先端要素)로 8절점등방특이요소(節點等方特異要素)를 사용(使用)하고, 균열발생(發生)은 파괴인성(破壞靭性)
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