Understanding and accounting for the effects of residual stresses on cleavage fracture toughness measurements in the transition temperature regime

R. G. Hurlston; J. K. Sharples; A. H. Sherry

doi:10.1016/j.ijpvp.2015.02.001

Understanding and accounting for the effects of residual stresses on cleavage fracture toughness measurements in the transition temperature regime

R. G. Hurlston, J. K. Sharples, A. H. Sherry

Amec Foster Wheeler Energy Ltd

Research output: Contribution to journal › Article › peer-review

Abstract

Secondary self-balancing stresses exist in structural components due to manufacturing processes, e.g. welding. When a defect is present, such secondary stresses will influence both the local crack driving force and the level of crack-tip constraint. Fracture mechanics specimens machined from welded components can also retain significant residual stresses, and these can influence the measurement of fracture toughness. This paper describes the results of an experimental and numerical programme aimed as quantifying the effect of residual stresses on cleavage fracture toughness measured in deeply-cracked and shallow-cracked fracture mechanics specimens and with a view to correcting the resultant data. The results indicate that the influence of retained residual stresses on cleavage fracture toughness in such specimens can be characterised using two-parameter fracture mechanics.

Original language	English
Pages (from-to)	69-83
Number of pages	15
Journal	International Journal of Pressure Vessels and Piping
Volume	128
DOIs	https://doi.org/10.1016/j.ijpvp.2015.02.001
Publication status	Published - 1 Apr 2015

Keywords

Cleavage fracture
Constraint
Local approach
Residual stress
Weld

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10.1016/j.ijpvp.2015.02.001

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abstract = "Secondary self-balancing stresses exist in structural components due to manufacturing processes, e.g. welding. When a defect is present, such secondary stresses will influence both the local crack driving force and the level of crack-tip constraint. Fracture mechanics specimens machined from welded components can also retain significant residual stresses, and these can influence the measurement of fracture toughness. This paper describes the results of an experimental and numerical programme aimed as quantifying the effect of residual stresses on cleavage fracture toughness measured in deeply-cracked and shallow-cracked fracture mechanics specimens and with a view to correcting the resultant data. The results indicate that the influence of retained residual stresses on cleavage fracture toughness in such specimens can be characterised using two-parameter fracture mechanics.",

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AU - Hurlston, R. G.

AU - Sharples, J. K.

AU - Sherry, A. H.

PY - 2015/4/1

Y1 - 2015/4/1

N2 - Secondary self-balancing stresses exist in structural components due to manufacturing processes, e.g. welding. When a defect is present, such secondary stresses will influence both the local crack driving force and the level of crack-tip constraint. Fracture mechanics specimens machined from welded components can also retain significant residual stresses, and these can influence the measurement of fracture toughness. This paper describes the results of an experimental and numerical programme aimed as quantifying the effect of residual stresses on cleavage fracture toughness measured in deeply-cracked and shallow-cracked fracture mechanics specimens and with a view to correcting the resultant data. The results indicate that the influence of retained residual stresses on cleavage fracture toughness in such specimens can be characterised using two-parameter fracture mechanics.

AB - Secondary self-balancing stresses exist in structural components due to manufacturing processes, e.g. welding. When a defect is present, such secondary stresses will influence both the local crack driving force and the level of crack-tip constraint. Fracture mechanics specimens machined from welded components can also retain significant residual stresses, and these can influence the measurement of fracture toughness. This paper describes the results of an experimental and numerical programme aimed as quantifying the effect of residual stresses on cleavage fracture toughness measured in deeply-cracked and shallow-cracked fracture mechanics specimens and with a view to correcting the resultant data. The results indicate that the influence of retained residual stresses on cleavage fracture toughness in such specimens can be characterised using two-parameter fracture mechanics.

KW - Cleavage fracture

KW - Constraint

KW - Local approach

KW - Residual stress

KW - Weld

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ER -

Understanding and accounting for the effects of residual stresses on cleavage fracture toughness measurements in the transition temperature regime

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Keywords

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