论文部分内容阅读
一、引言超高压厚壁管是管式法高压聚乙烯生产装置的主要设备之一,由于采用100kgf/cm~2左右级别的钢种,加上操作中出现压力和温度波动,材质的各向异性以及制造中可能会产生缺陷,使其疲劳强度和安会性问题一直受到人们的重视。五十年代以后,英国和日本等国对内压交变作用下厚壁管的疲劳强度进行了大量的研究,同时也对带内壁缺陷的厚壁管的疲劳寿命
I. INTRODUCTION EHV thick-walled pipe is one of the main equipment for the production of high-pressure polyethylene tubular pipe method, due to the use of about 100kgf / cm ~ 2 level of steel, coupled with pressure and temperature fluctuations in the operation, the material of the various Heterosexuality and manufacturing may have defects, so fatigue and security issues have been subject to the people’s attention. After the 1950s, Britain and Japan made extensive research on the fatigue strength of thick-walled tubes under the effect of internal pressure. At the same time, the fatigue life of thick-walled tubes with internal wall defects