Monte Carlo Simulations of the effects of warm pre-stress on the scatter in fracture toughness

Gelderen, D.G.A. Van; Rosahl, Karin; Booker, Julian D; Smith, David J.

doi:10.1016/j.engfracmech.2014.08.018

Cited by 4 publications

(2 citation statements)

References 33 publications

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“…For example, if a lower-bound toughness is assumed at the re-load temperature, say the 5 percentile value, is the apparent toughness following a WPS always then in excess of that value to a given failure probability? Probabilistic approaches have been applied to WPS predictions [40] based on the detailed model [38].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

‘Mind the gap’ in fitness-for-service assessment procedures-review and summary of a recent workshop

Larrosa

Ainsworth

Akid

et al. 2017

International Journal of Pressure Vessels and Piping

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'Mind the gap' in Fitness-for-Service (FFS) assessment procedures was a workshop held at The University of Manchester in June 2015. The goal of the workshop was firstly to identify 'knowledge gaps' or areas for improvement in FFS assessment procedures and, secondly, to present methodologies that have been developed to narrow these gaps. It was intended that identification of these 'gaps' would allow an understanding of the current development needs for defect tolerance arguments in the FFS assessment procedures. The following questions were addressed: 1) What are the main 'knowledge gaps' in current FFS assessment procedures and methodologies? 2) What are the main barriers that need to be overcome in order to narrow these 'gaps'? 3) What are the current procedures (if any) and why are these not useful, over-or under-conservative and what needs to be improved? 4) What research is currently ongoing in order to narrow the gaps? This paper summarises the presentations and discussions at the workshop on subjects such as environmentally assisted cracking mechanisms, creep, welding residual stresses and fracture mechanics.

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Section: Accepted Manuscriptmentioning

confidence: 99%

‘Mind the gap’ in fitness-for-service assessment procedures-review and summary of a recent workshop

Larrosa

Ainsworth

Akid

et al. 2017

International Journal of Pressure Vessels and Piping

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show abstract

“…Some examples of such preloading types are warm prestressing (WPS) [1][2][3][4][5][6][7][8][9][10], shot peening, and more recently, laser peening [11][12][13]. One of the common contributors to the benefits of these preloads is CRS, introduced at the crack tip.…”

Section: Introductionmentioning

confidence: 99%

Fracture Toughness Prediction under Compressive Residual Stress by Using a Stress-Distribution T-Scaling Method

Meshii

Ishihara²

2017

Metals

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Abstract:The improvement in the fracture toughness J c of a material in the ductile-to-brittle transition temperature region due to compressive residual stress (CRS) was considered in this study. A straightforward fracture prediction was performed for a specimen with mechanical CRS by using the T-scaling method, which was originally proposed to scale the fracture stress distributions between different temperatures. The method was validated for a 780-MPa-class high-strength steel and 0.45% carbon steel. The results showed that the scaled stress distributions at fracture loads without and with CRS are the same, and that J c improvement was caused by the loss in the one-to-one correspondence between J and the crack-tip stress distribution. The proposed method is advantageous in possibly predicting fracture loads for specimens with CRS by using only the stress-strain relationship, and by performing elastic-plastic finite element analysis, i.e., without performing fracture toughness testing on specimens without CRS.

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Evaluating the Conditions When Warm Pre-stressing does not Produce a Benefit in Apparent Toughness

Gelderen

Booker

Smith

2015

Materials Today: Proceedings

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Monte Carlo Simulations of the effects of warm pre-stress on the scatter in fracture toughness

Cited by 4 publications

References 33 publications

‘Mind the gap’ in fitness-for-service assessment procedures-review and summary of a recent workshop

‘Mind the gap’ in fitness-for-service assessment procedures-review and summary of a recent workshop

Fracture Toughness Prediction under Compressive Residual Stress by Using a Stress-Distribution T-Scaling Method

Evaluating the Conditions When Warm Pre-stressing does not Produce a Benefit in Apparent Toughness

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