摘要
针对带有扣压式接头的钢带缠绕增强复合管在内压爆破试验中出现的爆破点靠近接头的情形,基于薄壁壳理论,提出一种考虑应力集中效应的管道爆破压力计算模型。分析得到管壁的径向位移表达式,指出接头附近的管壁径向位移不连续导致的应力集中效应是爆破点靠近接头的主要原因。将2英寸(5.08 cm)4层增强层管道爆破试验、2英寸(5.08 cm)6层增强层管道爆破试验作为算例,分别计算了考虑应力集中效应情形下两种管道的爆破压力,并将计算结果与试验值对比,结果显示二者符合程度良好。通过该模型得到的管道爆破压力可为复合管生产厂家和施工单位评估其爆破压力提供一定参考。
According to the fact that the burst point of steel-strip reinforced plastic pipe with swaging end-fitting is close to the joint in internal pressure burst test,a model for calculating the pipe burst pressure considering the stress concentration effect(SCE)was proposed based on thin-walled shell theory.The radial displacement expression of pipe wall was obtained through analysis and it is pointed out that stress concentration effect caused by discontinuity of pipe wall radial displacement near the end-fitting is the main cause for closeness of burst point to the joint.By taking the burst tests of a 2-inch(5.08 cm)4-layer pipe sample and a 2-inch(5.08 cm)6-layer pipe sample as the calculation examples separately,the burst pressures of the two types of pipe considering stress concentration effect were calculated and compared with the test data.The results show that they are in good agreement.The pipe burst pressure obtained by present model can provide some references for composite pipe manufacturers and construction units to evaluate burst pressure of pipes in engineering projects.
作者
陈伟
唐夏焘
陈长
陈兴阳
白勇
Chen Wei;Tang Xiatao;Chen Zhang;Chen Xingyang;Bai Yong(Zhejiang Academy of Special Equipment Science,Hangzhou 310020,China;Key Laboratory of Special Equipment Safety Testing Technology of Zhejiang Province,Hangzhou 310020,China;College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China)
出处
《压力容器》
北大核心
2020年第9期61-67,共7页
Pressure Vessel Technology
基金
国家市场监督管理总局科技计划项目“内压作用下燃气聚乙烯管长周期性能测试及寿命分析”(2019MK032)。
关键词
钢带缠绕增强复合管
内压试验
扣压式接头
应力集中效应
薄壁壳理论
steel-strip reinforced plastic pipe
internal pressure test
swaging end-fitting
stress concentration effect(SCE)
thin-walled shell theory
