| 低温下用J_R曲线确定金属材料延性断裂韧度J_(IC)的研究 |
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| 引用本文： | 魏嘉荃,钟伯明.低温下用J_R曲线确定金属材料延性断裂韧度J_(IC)的研究[J].大庆石油学院学报,1990,14(3):107-116. |
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| 作者姓名： | 魏嘉荃 钟伯明 |
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| 作者单位： | 大庆石油学院机械系
(魏嘉荃，钟伯明，李其，秦洪)，大庆石油学院机械系(张立) |
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| 摘 要： | 以石油天然气设备及机器中常用的几种中、低强度钢为代表,通过弹塑性断裂力学J积分试验,研究了在低温环境下如何用J积分阻力曲线(J_R曲线)和裂纹尖端钝化线确定金属材料低温延性断裂韧度J_(IC)值,结果表明,该方法能得到J_(IC)随温度降低而降低的规律,适合于工程应用。
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| 关 键 词： | 低温 J_R曲线 钝化钱 延性断裂韧度J_(IC) |
THE RESEARCH FOR MEASURINC DUCTILE FRACTURE TOUGHNESS OF METAL MATERIAL BY J_R CURVE AT LOW TEMPERATURE |
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| WEI Jiaquan,ZHONG Boming,LI Qi,QIN Hong,ZHANG Li.THE RESEARCH FOR MEASURINC DUCTILE FRACTURE TOUGHNESS OF METAL MATERIAL BY J_R CURVE AT LOW TEMPERATURE[J].Journal of Daqing Petroleum Institute,1990,14(3):107-116. |
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| Authors: | WEI Jiaquan ZHONG Boming LI Qi QIN Hong ZHANG Li |
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| Affiliation: | WEI Jiaquan;ZHONG Boming;LI Qi;QIN Hong;ZHANG Li Department of Petroleum Mechanical Engineering |
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| Abstract: | To take some major low-strength steels and medium-strength steels in natural gas and Petroleum equipments and machines as samples, and to adoptJ-integral curves of elasto-plastic fracture mechanics, the measurement oflow temperature ductile fracture toughness of metal by J-integral resistancecurves (J_R curves ) and blunting line at crack tips is studied. The resultis that the regularity in the J_(IC) will decrease with the reducing tem-perature may be obtained by using the method described above which is applicable to engineering practice. |
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| Keywords: | low-temperature J_R curve blunting line ductile fracture toughness |
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