Quantitative evaluation of fracture toughness deterioration due to Pre-strain

Ozawa, T.; Kawabata, Tomoya; Mikami, Yoshiki

doi:10.1016/j.engfracmech.2022.108683

Cited by 2 publications

(1 citation statement)

References 30 publications

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“…Ozawa et.al. [20] investigated the effects of compressive plastic strain, it shows increasing local compressive strain tended to decrease fracture toughness. The fracture toughness with 1% LC strain decreased by half or more in comparison with the value without LC.…”

Section: Introductionmentioning

confidence: 99%

Effects of in-service strain on girth weld failure of an X80 pipeline

Hongyuan,

Xiongxiong,

Dongliang

et al. 2024

J Braz. Soc. Mech. Sci. Eng.

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In general, transmission pipelines are designed by hoop stress induced by internal pressure, and maximum longitudinal stress. The paper is mainly about the failure analysis of an X80 pipeline brittle fracture on girth weld under in-service strain. The digital image correlation (DIC) in the tensile tests was used to analyze the permanent plastic strain on girth weld metal under in-service strain. Then, the Charpy energy of the girth weld metal with the concentrated plastic strain was tested to evaluate the deterioration of toughness. Finally, the mechanism of the brittle fracture of the girth weld is clari ed. The results show that the girth welds may have obvious plastic deformation under an elastic in-service strain of the pipeline. It may lead to a signi cant deterioration of the toughness, which results in the failure of the pipeline under the strain-controlled load.

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Section: Introductionmentioning

confidence: 99%

Effects of in-service strain on girth weld failure of an X80 pipeline

Hongyuan,

Xiongxiong,

Dongliang

et al. 2024

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

show abstract

Effects of In-Service Strain on Girth Weld Failure of an X80 Pipeline

Chen,

Xiongxiong,

Dongliang

et al. 2023

Preprint

View full text Add to dashboard Cite

In general, transmission pipelines are designed by hoop stress induced by internal pressure, and maximum longitudinal stress. The paper is mainly about the failure analysis of an X80 pipeline brittle fracture on girth weld under in-service strain. The digital image correlation (DIC) in the tensile tests was used to analyze the permanent plastic strain on girth weld metal under in-service strain. Then, the Charpy energy of the girth weld metal with the concentrated plastic strain was tested to evaluate the deterioration of toughness. Finally, the mechanism of the brittle fracture of the girth weld is clarified. The results show that the girth welds may have obvious plastic deformation under an elastic in-service strain of the pipeline. It may lead to a significant deterioration of the toughness, which results in the failure of the pipeline under the strain-controlled load.

show abstract

Quantitative evaluation of fracture toughness deterioration due to Pre-strain

Cited by 2 publications

References 30 publications

Effects of in-service strain on girth weld failure of an X80 pipeline

Effects of in-service strain on girth weld failure of an X80 pipeline

Effects of In-Service Strain on Girth Weld Failure of an X80 Pipeline

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