Applicability of bending critical CODs for assessing fracture strength of low-temperature service steel weldments.

Kaihara, Shigekoto; Murayama, Takehiro; Kohno, Takesuke; Minani, Fumiyoshi; Toyoda, Masao; Satoh, Kunihiko

doi:10.2207/qjjws.4.176

Cited by 7 publications

(2 citation statements)

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“…. Satou 1) 와 kuhara 2) 는 실구조물에 대해 주요 하중재하 형식이 인장하중을 받는 광폭판의 파괴 실험을 실시하여 그 인장한계 CTOD값이 표준 3점굽 힘 CTOD실험에서 구한 한계 CTOD값보다 더 크게 발생하는 것을 알 수 있었다. 또한, 균열길이가 다른 시험편을 이용하여 3점굽힘실험을 실시한 결과, 한계 CTOD값은 균열길이의 영향을 받아 균열길이가 길수록 약간 작아지는 경향을 보였다 [6][7] .…”

Section: 연구 배경 및 목적unclassified

Fracture Characteristics of Cryogenic Steel Using Weibull Stress Analysis

박¹,

안²

2019

Journal of Welding and Joining

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The standardized three-point bending CTOD test as a fracture toughness test of materials has established a system in which the safety evaluation of brittle fracture of welded steel structures can be reasonably handled from the viewpoint of design, manufacture, and inspection. However, the evaluation system, which has been applied to the design, has been thoroughly examined for its validity by various experiments, analysis, and various problems have been found as a result of the application to the thick and high strength steel sheet. In particular, the concept that the failure limit evaluated by three-point bending CTOD is the same in the real structural members has been applied to the design. However, experimental and analytical results have been reported that the CTOD results do not satisfy the mechanical parameters that govern the fracture limit of cracked members. In this study, evaluated the suitability of 9% Ni steel as the inner tank material of LNG storage tank using weibull stress. For this purpose, we calculated the weibull stress from the CTOD test and predicted the failure stress and load of the real structure in consideration of the restraining effect.

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Section: 연구 배경 및 목적unclassified

Fracture Characteristics of Cryogenic Steel Using Weibull Stress Analysis

박¹,

안²

2019

Journal of Welding and Joining

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“…Engineering approach based on conventional fracture mechanics has been used for brittle fracture assessment of structural components. However, many studies have reported that fracture resistance of cracked components subjected to mode I load under large scale yielding condition estimated based on fracture mechanics depends on specimen geometry and size, that is cracktip plastic constraint [1][2][3][4] . Weibull stress as a new fracture parameter based on "Local Approach" has been proposed to evaluate the effect of crack-tip plastic constraint on brittle fracture resistance.…”

Section: Introductionmentioning

confidence: 99%