{"title":"X80管线钢五种断裂形态裂纹萌生和扩展的损伤模型预测","authors":"B. Williams, J. Xue, Su Xu, D. Park, W. Tyson","doi":"10.1115/1.4053737","DOIUrl":null,"url":null,"abstract":"\n Test specimens used to calibrate damage-mechanics models are designed to produce a range of stress triaxialities and Lode angles to accurately capture the fracture envelope of the metal. Many of these specimens have lower constraint than deeply-notched fracture specimens that undergo stable tearing and have high constraint at the crack tip. Often just one or two fracture geometries are used to calibrate the model. In the current work, the ability of a damage model to capture variability associated with constraint at a crack tip, particularly for crack initiation, is assessed. A recent round-robin [1] study on the initiation toughness of X80 provided data for five fracture specimens in which crack tip constraint varied. As a damage model for X80 was not available, the well-calibrated MMC damage models from literature for X65 and X70 were used as a starting point for the model. Experimental data from the single Compact Tension C(T) specimen was used to slightly modify the X65 and X70 models to capture the X80 fracture response. The MMC damage model was applied in FEA to simulate both the crack initiation and propagation responses of Single-Edge-Notched-Tension (SENT) and surface-cracked pipe specimens. Except for a low J-integral at initiation predicted for the C(T) specimen, the remaining predicted responses for force, pressure, and initiation were in good agreement with the experimental data provided in the round-robin.","PeriodicalId":50080,"journal":{"name":"Journal of Pressure Vessel Technology-Transactions of the Asme","volume":null,"pages":null},"PeriodicalIF":1.0000,"publicationDate":"2022-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":"{\"title\":\"Damage Model Prediction of Crack Initiation and Propagation in Five Fracture Geometries for X80 Pipeline Steel\",\"authors\":\"B. Williams, J. Xue, Su Xu, D. Park, W. Tyson\",\"doi\":\"10.1115/1.4053737\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"\\n Test specimens used to calibrate damage-mechanics models are designed to produce a range of stress triaxialities and Lode angles to accurately capture the fracture envelope of the metal. Many of these specimens have lower constraint than deeply-notched fracture specimens that undergo stable tearing and have high constraint at the crack tip. Often just one or two fracture geometries are used to calibrate the model. In the current work, the ability of a damage model to capture variability associated with constraint at a crack tip, particularly for crack initiation, is assessed. A recent round-robin [1] study on the initiation toughness of X80 provided data for five fracture specimens in which crack tip constraint varied. As a damage model for X80 was not available, the well-calibrated MMC damage models from literature for X65 and X70 were used as a starting point for the model. Experimental data from the single Compact Tension C(T) specimen was used to slightly modify the X65 and X70 models to capture the X80 fracture response. The MMC damage model was applied in FEA to simulate both the crack initiation and propagation responses of Single-Edge-Notched-Tension (SENT) and surface-cracked pipe specimens. Except for a low J-integral at initiation predicted for the C(T) specimen, the remaining predicted responses for force, pressure, and initiation were in good agreement with the experimental data provided in the round-robin.\",\"PeriodicalId\":50080,\"journal\":{\"name\":\"Journal of Pressure Vessel Technology-Transactions of the Asme\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.0000,\"publicationDate\":\"2022-02-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Pressure Vessel Technology-Transactions of the Asme\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.1115/1.4053737\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"ENGINEERING, MECHANICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Pressure Vessel Technology-Transactions of the Asme","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1115/1.4053737","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
Damage Model Prediction of Crack Initiation and Propagation in Five Fracture Geometries for X80 Pipeline Steel
Test specimens used to calibrate damage-mechanics models are designed to produce a range of stress triaxialities and Lode angles to accurately capture the fracture envelope of the metal. Many of these specimens have lower constraint than deeply-notched fracture specimens that undergo stable tearing and have high constraint at the crack tip. Often just one or two fracture geometries are used to calibrate the model. In the current work, the ability of a damage model to capture variability associated with constraint at a crack tip, particularly for crack initiation, is assessed. A recent round-robin [1] study on the initiation toughness of X80 provided data for five fracture specimens in which crack tip constraint varied. As a damage model for X80 was not available, the well-calibrated MMC damage models from literature for X65 and X70 were used as a starting point for the model. Experimental data from the single Compact Tension C(T) specimen was used to slightly modify the X65 and X70 models to capture the X80 fracture response. The MMC damage model was applied in FEA to simulate both the crack initiation and propagation responses of Single-Edge-Notched-Tension (SENT) and surface-cracked pipe specimens. Except for a low J-integral at initiation predicted for the C(T) specimen, the remaining predicted responses for force, pressure, and initiation were in good agreement with the experimental data provided in the round-robin.
期刊介绍:
The Journal of Pressure Vessel Technology is the premier publication for the highest-quality research and interpretive reports on the design, analysis, materials, fabrication, construction, inspection, operation, and failure prevention of pressure vessels, piping, pipelines, power and heating boilers, heat exchangers, reaction vessels, pumps, valves, and other pressure and temperature-bearing components, as well as the nondestructive evaluation of critical components in mechanical engineering applications. Not only does the Journal cover all topics dealing with the design and analysis of pressure vessels, piping, and components, but it also contains discussions of their related codes and standards.
Applicable pressure technology areas of interest include: Dynamic and seismic analysis; Equipment qualification; Fabrication; Welding processes and integrity; Operation of vessels and piping; Fatigue and fracture prediction; Finite and boundary element methods; Fluid-structure interaction; High pressure engineering; Elevated temperature analysis and design; Inelastic analysis; Life extension; Lifeline earthquake engineering; PVP materials and their property databases; NDE; safety and reliability; Verification and qualification of software.