Fracture Toughness Prediction under Compressive Residual Stress by Using a Stress-Distribution T-Scaling Method
The improvement in the fracture toughness Jc 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 meth...
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MDPI AG
2017-12-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/8/1/6 |
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doaj-4115a7c5cfea423f9a009589313416da2020-11-25T00:51:51ZengMDPI AGMetals2075-47012017-12-0181610.3390/met8010006met8010006Fracture Toughness Prediction under Compressive Residual Stress by Using a Stress-Distribution T-Scaling MethodToshiyuki Meshii0Kenichi Ishihara1Faculty of Engineering, University of Fukui, Fukui 910-8507, JapanKobelco Research Institute, Inc. 1-5-5 Takatsukadai, Nishi-ku, Kobe, Hyogo 651-2271, JapanThe improvement in the fracture toughness Jc 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 Jc 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.https://www.mdpi.com/2075-4701/8/1/6Fracture toughnessductile-to-brittle transition temperature regioncompressive residual stresssmall-scale yieldingsingle-edge notched bend barstress-distribution scalingT-scaling methodstress–strain relationship |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Toshiyuki Meshii Kenichi Ishihara |
| spellingShingle |
Toshiyuki Meshii Kenichi Ishihara Fracture Toughness Prediction under Compressive Residual Stress by Using a Stress-Distribution T-Scaling Method Metals Fracture toughness ductile-to-brittle transition temperature region compressive residual stress small-scale yielding single-edge notched bend bar stress-distribution scaling T-scaling method stress–strain relationship |
| author_facet |
Toshiyuki Meshii Kenichi Ishihara |
| author_sort |
Toshiyuki Meshii |
| title |
Fracture Toughness Prediction under Compressive Residual Stress by Using a Stress-Distribution T-Scaling Method |
| title_short |
Fracture Toughness Prediction under Compressive Residual Stress by Using a Stress-Distribution T-Scaling Method |
| title_full |
Fracture Toughness Prediction under Compressive Residual Stress by Using a Stress-Distribution T-Scaling Method |
| title_fullStr |
Fracture Toughness Prediction under Compressive Residual Stress by Using a Stress-Distribution T-Scaling Method |
| title_full_unstemmed |
Fracture Toughness Prediction under Compressive Residual Stress by Using a Stress-Distribution T-Scaling Method |
| title_sort |
fracture toughness prediction under compressive residual stress by using a stress-distribution t-scaling method |
| publisher |
MDPI AG |
| series |
Metals |
| issn |
2075-4701 |
| publishDate |
2017-12-01 |
| description |
The improvement in the fracture toughness Jc 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 Jc 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. |
| topic |
Fracture toughness ductile-to-brittle transition temperature region compressive residual stress small-scale yielding single-edge notched bend bar stress-distribution scaling T-scaling method stress–strain relationship |
| url |
https://www.mdpi.com/2075-4701/8/1/6 |
| work_keys_str_mv |
AT toshiyukimeshii fracturetoughnesspredictionundercompressiveresidualstressbyusingastressdistributiontscalingmethod AT kenichiishihara fracturetoughnesspredictionundercompressiveresidualstressbyusingastressdistributiontscalingmethod |
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