螺栓连接压力容器耐压强度性能  

Compressive strength performance of bolt-jionted composite pressure vessel

作　　者：王明 郑志才 肖亚超 王志增 齐风杰 葛林海 孟祥武 陈艳 WANG Ming;ZHENG Zhicai;XIAO Yachao;WANG Zhizeng;QI Fengjie;GE Linhai;MENG Xiangwu;CHEN Yan(Shandong Non-metallic Materials Institute,Jinan 250031,China)

机构地区：[1]山东非金属材料研究所,济南250031

出　　处：《工程塑料应用》2024年第10期136-142,共7页Engineering Plastics Application

摘　　要：针对较小长径比复合材料压力容器需进一步减重的应用需求,设计了一种螺栓连接大开口复合材料压力容器,并以直径290 mm压力容器为例,基于网络分析法,设计了碳纤维复合材料压力容器的纤维铺层厚度、缠绕角度以及层数等信息。利用水压试验首先考察了直径6.5 mm、材质分别为TC4和TC11的螺栓对大开口碳纤维复合材料压力容器耐压强度的影响;在此基础上考察了直径9 mm、材质分别为TC4,TC11和35CrMnSi的螺栓对压力容器耐压强度的影响。试验结果表明,螺栓连接复合材料压力容器承载内压时,螺栓连接部位的复合材料为薄弱区域,该部位复合材料需满足挤压、轴向拉伸以及环向承载,因此需额外补强。同时,螺栓需具备足够的抗拉、抗弯强度,相同材质下,随着螺栓直径的增大,受力面积增加,其抗拉、抗弯强度大幅提高;通过选用更高强度的螺栓,复合材料压力容器的耐压强度大幅提高。To fill the application needs for further weight reduction of composite pressure vessels with small aspect ratio,a bolt-jointed large end-opened composite pressure vessel was designed.Taking a diameter of 290 mm pressure vessel as an example,the fiber layer thickness,winding angle,and number of layers of the carbon fiber composite pressure vessels were designed based on network analysis method.The influences of bolts with a diameter of 6.5 mm and materials of TC4 and TC11 respectively on the internal compressive strength of the large end-opened carbon fiber composite pressure vessels were first investigated by hydrostatic test.On the basis,the influences of bolts with diameter of 9 mm and materials of TC4,TC11,and 35CrMnSi on the internal compressive strength of the pressure vessels were also investigated.The tests results indicate that when bolt-jointed pressure vessels bear internal pressure,the composite material at the bolted joint is a weak area,the composite material at this location needs to meet the requirements of compression,axial tension,and circumferential bearing,therefore,additional reinforcement is needed.At the same time,bolts need to have sufficient tensile and bending strength.When the material of bolts is the same,as the diameter of the bolts increased,the stress area increased,its tensile and bending strength is greatly improved.By selecting bolts with higher strength material,the pressure resistances of composite pressure vessels are improved greatly.

关 键 词：螺栓连接 大开口 压力容器 复合材料 耐压强度 

分 类 号：TQ321[化学工程—合成树脂塑料工业]