理化检验-物理分册2017，Vol.53Issue(1)：5-9,5.DOI:10.11973/lhjy-wl201701002
小直径薄壁管件四点加载时的应力与挠度
Stress and Deflection of Small-diameter and Thin-wall Pipes under Four-point Loading
万章 1汪睿 2孔韦海 3张强1
作者信息
- 1. 合肥通用机械研究院，合肥 230031
- 2. 国家压力容器与管道安全工程技术研究中心，合肥 230031
- 3. 安徽省压力容器与管道安全技术省级实验室，合肥 230031
- 折叠
摘要
Abstract
Small-diameter and thin-wall pipes were difficult to prepare standard specimens and accurately load on due to their size constrains,when the stress-corrosion resistance testing was carried out.Four-point loading method was used to study the axial stress loading problem of navicular specimens of the small-diameter and thin-wall pipes,and the formulas for calculating the stress and bending deflection were deduced;the stress of the specimens was simulated by ANSYS software,and then the effect of load stress,chord height,wall thickness and outer radius on the error between calculated stress and actual stress was analyzed;finally,the lab tests were used to evaluate the error between calculated stress and actual stress of navicular specimens of the small-diameter and thin-walled pipes.The results show that:under the same condition,the error of the loading stress of positive-bending specimens was larger than that of reverse-bending specimens;the stress error increased with the increase of the outer radius,but didn’t change with the loading stress;the effect of pipe wall thickness on the stress error was complicated;the influence of chord height on the stress error was the most significant;only when the chord height of reverse-bending specimens was less than 5 mm and the chord height of positive-bending specimens was less than 4 mm,the stress error between calculated stress and actual stress of navicular specimens of the small-diameter and thin-walled pipes was within the acceptable range in engineering.关键词
小直径薄壁管件/四点加载/应力腐蚀/挠度Key words
small-diameter and thin-wall pipe/four-point loading/stress corrosion/deflection分类
通用工业技术引用本文复制引用
万章,汪睿,孔韦海,张强..小直径薄壁管件四点加载时的应力与挠度[J].理化检验-物理分册,2017,53(1):5-9,5.
