Comparison of CTOD standards: BS 7448-Part 1 and revised ASTM E1290

Tagawa, Tetsuya; Kayamori, Yoichi; Ohata, Mitsuru; Handa, Tsunehisa; Kawabata, Tomoya; Yamashita, Yoichi; Tsutsumi, Kazuyuki; Yoshinari, Hitoshi; Aihara, Shuji; Hagihara, Yukito

doi:10.1016/j.engfracmech.2009.02.009

Cited by 32 publications

(13 citation statements)

References 10 publications

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“…Recently, Tagawa et al [218] found that ASTM E1290-08e1 tends to give a smaller value of d c than BS 7448. Thus, further investigations are needed to resolve the differences between these two standards.…”

Section: Ctod Testing and Astm E1290 (E1820) Developmentmentioning

confidence: 99%

Review of fracture toughness (G, K, J, CTOD, CTOA) testing and standardization

Zhu

Joyce

2012

Engineering Fracture Mechanics

604

161

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Stress intensity factor Energy release rate CTOD CTOA J-integral J-R curve K-R curve ASTM standard a b s t r a c tThe present paper gives a technical review of fracture toughness testing, evaluation and standardization for metallic materials in terms of the linear elastic fracture mechanics as well as the elastic-plastic fracture mechanics. This includes the early investigations and recent advances of fracture toughness test methods and practices developed by American Society for Testing and Materials (ASTM). The review describes the most important fracture mechanics parameters: the elastic energy release rate G, the stress intensity factor K, the Jintegral, the crack-tip opening displacement (CTOD) and the crack-tip opening angle (CTOA) from the basic concept, definition, to experimental estimation, test methods and ASTM standardizing practices. Attention is paid to guidelines on how to choose an appropriate fracture parameter to characterize fracture toughness for the material of interest, and how to measure the fracture toughness value defined either at a critical point or in a resistance curve format using laboratory specimens. The relevant ASTM fracture toughness test standards considered in this paper are E399 for K Ic testing, E561 for K-R curve testing, E813 for J Ic testing, E1152 for J-R curve testing, E1737 for J Ic and J-R curve testing, E1290 for CTOD (d) testing, a combined common test standard E1820 for measuring the three parameters of K, J and d, E1921 for the transition reference temperature T 0 testing and the master curve of cleavage toughness K Jc testing, and E2472 for CTOA testing. The effects of loading rate, temperature and crack-tip constraint on fracture toughness as well as fracture instability analysis are also reviewed.

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Section: Ctod Testing and Astm E1290 (E1820) Developmentmentioning

confidence: 99%

Review of fracture toughness (G, K, J, CTOD, CTOA) testing and standardization

Zhu

Joyce

2012

Engineering Fracture Mechanics

604

161

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“…The SIF can be estimated using the crack-tip opening displacement (CTOD) test [27]. In terms of , the SIF component can be expressed in the CTOD test as: The enrichment functions usually divide into an asymptotic function that describes the near-tip mechanical singularity and a discontinuous function that describes the displacement jump as crossing the crack surfaces.…”

Section: Displacement-extrapolation Methodsmentioning

confidence: 99%

“…The SIF can be estimated using the crack-tip opening displacement (CTOD) test [27]. In terms of K I , the SIF component can be expressed in the CTOD test as:…”

Section: Displacement-extrapolation Methodsmentioning

confidence: 99%

Solidification Crack Evolution in High-Strength Steel Welding Using the Extended Finite Element Method

2020

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High-strength steel suffers from an increasing susceptibility to solidification cracking in welding due to increasing carbon equivalents. However, the cracking mechanism is not fully clear for a confidently completely crack-free welding process. To present a full, direct knowledge of fracture behavior in high-strength steel welding, a three-dimensional (3-D) modeling method is developed using the extended finite element method (XFEM). The XFEM model and fracture loads are linked with the full model and the output of the thermo-mechanical finite element method (TM-FEM), respectively. Solidification cracks in welds are predicted to initiate at the upper tip at the current cross-section, propagate upward to and then through the upper weld surface, thereby propagating the lower crack tip down to the bottom until the final failure. This behavior indicates that solidification cracking is preferred on the upper weld surface, which has higher weld stress introduced by thermal contraction and solidification shrinkage. The modeling results show good agreement with the solidification crack fractography and in situ observations. Further XFEM results show that the initial defects that exhibit higher susceptibility to solidification cracking are those that are vertical to the weld plate plane, open to the current cross-section and concentratedly distributed compared to tilted, closed and dispersedly distributed ones, respectively.

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“…Figura 22 -Conversão do deslocamento obtido da boca do entalhe para deslocamento na ponta da trinca (Tagawa et al, 2010).…”

Section: Contribuição De Dawes a Determinação Do Ctod (δ)unclassified

“…Figura 107 -Amostra utilizada para levantamento de dureza do aço API 5L X65 (Souza, 2011 Sendo assim adotou-se estimar tais propriedades através Equações analíticas (77) e (78), respectivamente, recomendadas pela norma japonesa WES2808 (Tagawa et al, 2010).  us (T amb ) = limite de resistência mecânica a temperatura ambiente (25 ºC); Com a análise dos valores da Tabela 18, se conclui que a temperatura de transição dúctil-frágil (TTDF) encontra-se na faixa entre a última temperatura do patamar superior (-90 o C) e a primeira temperatura do patamar inferior (-100 o C).…”

Section: Ensaio De Durezaunclassified

Comportamento De Aço Estrutural Api 5l X65 Após Exposição Ao Hidrogênio: Uma Abordagem Baseada Na Fratura Dúctil

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Comparison of CTOD standards: BS 7448-Part 1 and revised ASTM E1290

Cited by 32 publications

References 10 publications

Review of fracture toughness (G, K, J, CTOD, CTOA) testing and standardization

Review of fracture toughness (G, K, J, CTOD, CTOA) testing and standardization

Solidification Crack Evolution in High-Strength Steel Welding Using the Extended Finite Element Method

Comportamento De Aço Estrutural Api 5l X65 Após Exposição Ao Hidrogênio: Uma Abordagem Baseada Na Fratura Dúctil

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