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Transferability of Charpy Absorbed Energy to Fracture Toughness Based on Weibull Stress Criterion 被引量:1

Transferability of Charpy Absorbed Energy to Fracture Toughness Based on Weibull Stress Criterion
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摘要 The relationship between Charpy absorbed energy and the fracture toughness by means of the (crack tip opening displacement (CTOD)) method was analyzed based on the Weibull stress criterion. The Charpy absorbed energy and the fracture toughness were measured for the SN490B steel under the ductile-brittle transition temperature region. For the instrumented Charpy impact test, the curves between the loading point displacement and the load against time were recorded. The critical Weibull stress was taken as a fracture controlled parameter, and it could not be affected by the specimen configuration and the loading pattern based on the local approach. The parameters controlled brittle fracture are obtained from the Charpy absorbed energy results, then the fracture toughness for the compact tension (CT) specimen is predicted. It is found that the results predicted are in good agreement with the experimental. The fracture toughness could be evaluated by the Charpy absorbed energy, because the local approach gives a good description for the brittle fracture even though the Charpy impact specimen or the CT specimen is used for the given material.
出处 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2005年第1期1-4,共4页 材料科学技术(英文版)
基金 The work is supported by the National Natural Science Foundation of China under grant No.50275107 by Fok Ying Tung Education Foundation under grant No.81405.
关键词 Local approach Weibull stress Fracture toughness Charpy absorbed energy Local approach Weibull stress Fracture toughness Charpy absorbed energy
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