含凹坑缺陷结构疲劳寿命的快速估算方法

邝临源; 郑连纲; 苏东川; 王东辉; 孙英学

doi:10.11889/j.0253-3219.2016.hjs.39.040606

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含凹坑缺陷结构疲劳寿命的快速估算方法

更新时间：2021-05-25

- 含凹坑缺陷结构疲劳寿命的快速估算方法
- A fast approach for fatigue life estimation of structure with pit defect
- 核技术 2016年39卷第4期文章编号：040606
- 作者机构：
  
  中国核动力研究设计院核反应堆系统设计技术重点实验室成都 610213
- 作者简介：
  
  邝临源,男,1984年出生,2009年于清华大学获硕士学位,现从事反应堆结构力学研究
- 基金信息：
  
  中国核动力研究设计院青年基金(No.JJXM-QNJJ-11-12-004)资助 Supported by Youth Fund of Nuclear Power Institute of China (No.JJXM-QNJJ-11-12-004)()
- DOI：10.11889/j.0253-3219.2016.hjs.39.040606
  中图分类号： TL99;TB12
- 收稿日期：2015-11-26，
  
  修回日期：2016-02-18，
  
  录用日期：2016-02-18，
  
  纸质出版日期：2016-04-25
- 稿件说明：
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邝临源, 郑连纲, 苏东川, 等. 含凹坑缺陷结构疲劳寿命的快速估算方法[J]. 核技术, 2016,39(4):040606

Linyuan KUANG, Liangang ZHENG, Dongchuan SU, et al. A fast approach for fatigue life estimation of structure with pit defect[J]. Nuclear techniques, 2016, 39(4): 040606
邝临源, 郑连纲, 苏东川, 等. 含凹坑缺陷结构疲劳寿命的快速估算方法[J]. 核技术, 2016,39(4):040606 DOI： 10.11889/j.0253-3219.2016.hjs.39.040606.

Linyuan KUANG, Liangang ZHENG, Dongchuan SU, et al. A fast approach for fatigue life estimation of structure with pit defect[J]. Nuclear techniques, 2016, 39(4): 040606 DOI： 10.11889/j.0253-3219.2016.hjs.39.040606.

摘要

基于Miner线性累积损伤理论

探讨了含凹坑缺陷结构使用系数与相应的无缺陷结构使用系数之间的计算关系。在

曲线数据拟合的基础上

推导了许用循环次数的比值计算式

并以核压力容器常用材料为例

给出了计算式待定常数的取值及适用范围。形成的疲劳寿命估算方法

为含凹坑缺陷结构的快速疲劳分析及评定提供了一种参考方法。

Abstract

Background:

The appearance of smooth pit defect brings considerable difficulties to the prediction of fatigue life of structure whilst the traditional approach of fatigue analysis hardly meets the requirements of engineering applications.

Purpose:

This study aims to find a fast approach for fatigue life estimation of structure with pit defeat for engineering applications.

Methods:

Based on Miner linear cumulative damage rule

the quantitative relation between usage factor of structure with pit defect and that of structure without pit defect is determined. Based on the data fitting of the

curve

the expressions of ratio of the permissible number of cycles are deduced

and the range of application is given for common materials of nuclear pressure vessel.

Results:

Computional results using above mentioned approach provide the codomain of undetermined constants and sphere of application.

Conclusion:

The approach for fatigue life estimation of structure with pit defect meets the requirements of engineering applications

thus is suitable to fast estimation of fatigue life for nuclear pressure vessel.

关键词

Keywords

references

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CHEN Chuanyao . Fatigue and fracture . Wuhan:Huazhong University of Science and Technology Press , 2002 .

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