CONSTRAINT EFFECT ANALYSIS OF THE SEMI-ELLIPTICAL SURFACE CRACK FOR A REACTOR VESSEL SUBJECTED TO PRESSURIZED

WANG ZhongXian; GUO HuaJing

doi:10.16579/j.issn.1001.9669.2017.05.044

您当前的位置：

首页 >

文章列表页 >

CONSTRAINT EFFECT ANALYSIS OF THE SEMI-ELLIPTICAL SURFACE CRACK FOR A REACTOR VESSEL SUBJECTED TO PRESSURIZED

更新时间：2022-09-22

- CONSTRAINT EFFECT ANALYSIS OF THE SEMI-ELLIPTICAL SURFACE CRACK FOR A REACTOR VESSEL SUBJECTED TO PRESSURIZED
- Journal of Mechanical Strength Vol. 39, Issue 5, Pages: 1251-1254(2017)
- 作者机构：
  
  1. 江苏大学土木工程与力学学院
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2017.05.044
  CLC：
扫描看全文
WANG ZhongXian, GUO HuaJing. CONSTRAINT EFFECT ANALYSIS OF THE SEMI-ELLIPTICAL SURFACE CRACK FOR A REACTOR VESSEL SUBJECTED TO PRESSURIZED. [J]. 39(5):1251-1254(2017)
DOI：

WANG ZhongXian, GUO HuaJing. CONSTRAINT EFFECT ANALYSIS OF THE SEMI-ELLIPTICAL SURFACE CRACK FOR A REACTOR VESSEL SUBJECTED TO PRESSURIZED. [J]. 39(5):1251-1254(2017) DOI： 10.16579/j.issn.1001.9669.2017.05.044.

摘要

基于J-A,2,双参数法,通过三维有限元数值模拟,对带有表面半椭圆裂纹的承压反应堆压力容器在高温高压的工况下,即T=561 K,内压p=10 MPa,其裂纹前沿约束效应进行研究。取三组不同裂纹短长轴比a/c=1/2、1/3、1/5(a=20 mm,c=40 mm,60 mm,100 mm),取三组不同材料应变硬化指数n=10、15、20的情况进行了弹塑性分析,得到相对应的J积分和约束参量A,2,。研究结果表明:J积分随着短长轴比a/c减小而有所增大,而几乎不受硬化指数n的影响;硬化指数n的增大会弱化a/c对A,2,的影响;裂纹最深点(θ=90°)是最危险点处。

Abstract

The specimen is a reactor pressure vessel with a semi-elliptical surface crack with axial orientation and its 3D finite element numerical modeling is built. Based on J-A,2, two parameters method,analysis is performed by considering constraint effect,at T = 561 K,p = 10 MPa. Three different aspect ratio（ a/c） and Ramberg-Osgood exponent（ n） is analylized,namely a/c = 1/2,1/3,1/5（ a = 20 mm,c = 40 mm,60 mm,100 mm） and n = 10,15,20. The corresponding J-integral and constraint parameter A,2, is gained. The research results show that: J-integral increases with the decrease of aspect ratio a/c,and RambergOsgood exponent（ n） almost has no effect on J-integral. The increase of Ramberg-Osgood exponent（ n） will weaken the effect of aspect ratio a/c on A,2,. The most serious point is the deepest point of a crack.

关键词

表面半椭圆裂纹高温高压约束效应J积分约束参量

Keywords

Semi-elliptical surface crackHigh temperature and pressureConstraint effectJ-integralConstraint parameter

references

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

STUDY ON FATIGUE CRACK GROWTH RATE BASED ON ELASTIC-PLASTIC MECHANICS (MT)

ANALYSIS ON LIMIT LOAD AND J-INTEGRAL FOR EMBEDDED AND PROPAGATED CRACK PLATES UNDER BIAXIAL LOADING

MIXED-MODE Ⅰ-Ⅱ FRACTURE BEHAVIOR OF FV520B STEEL

A J-INTEGRAL MEASUREMENT METHOD BASED ON DIGITAL IMAGE CORRELATION

IMPROVED FORMULA FOR FATIGUE CRACK GROWTH RATEUNDER DIFFERENT STRESS RATIO

Related Author

No data

Related Institution

School of Mechanical Engineering and Automation, Northeastern University

CRRC Tangshan Locomotive and Rolling Stock Co., Ltd.

Electrical and Electronic Engineering Institute,Zhejiang Industry Polytechnic College

School of Civil and Environmental Engineering,Ningbo University

Zhejiang XCC Group Co.,Ltd.

⁰