| 压力容器断裂韧度要求的预测 |
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| 引用本文： | 刘海侠.压力容器断裂韧度要求的预测[J].河北软件职业技术学院学报,2007,9(3):63-65. |
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| 作者姓名： | 刘海侠 |
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| 作者单位： | 华北电力大学,机械系,河北,保定,071000 |
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| 摘 要： | 本文在弹塑性断裂双参数分析方法的基础上,导出了预测压力容器等重要工程结构断裂韧度CTOD要求的理论表达式.只要在实际结构服役条件下,材料断裂韧度高于该表达式要求的韧度值,就可防止结构的弹塑性断裂失效.同时,在该表达式中考虑了应力集中及焊接残余应力的影响,并表明断裂韧度要求随作用应力及板厚的增加而增加.最后给出了两个实例,以考核该理论表达式的实用性.
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| 关 键 词： | 压力容器 断裂韧度 弹塑性断裂 缺陷评定 |
| 文章编号： | 1673-2022（2007）03-0063-03 |
| 修稿时间： | 2006-06-20 |
Prediction of Fracture Toughness Requirement for Pressure Vessels |
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| LIU Hai-xia.Prediction of Fracture Toughness Requirement for Pressure Vessels[J].Journal of Hebei Software Institute,2007,9(3):63-65. |
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| Authors: | LIU Hai-xia |
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| Institution: | North China Electric Power University, Baoding 07100 |
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| Abstract: | Based on a two- parameter analysis method of elastic - plastic fracture, a theoretical expression of estimating fracture toughness CTOD requirement has been derived for pressure vessels and other important engineering structures . Provided the fracture toughness of materials in the pactical service condition of structures could be prevented In the expression, stress concentration and residual stresses have been taken into account, and it is indicated that fracture toughness requirement increases with increases with increasing the applied stress and plate thickness. Finally, two practical examples are given to examine the practicality of the theoretical expression. |
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| Keywords: | pressure vessel fracture toughness elasticplastic fracture evaluating defect |
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