缠绕层表面缺陷对CNG-2复合气瓶爆破压力的影响  

Effect of Rectangular Groove Surface Defect to CNG-2 Composite Cylinder's Burst Pressure

作　　者：李斌 马凯[2] 由宏新[2] 

机构地区：[1]国家压缩天然气气瓶质量监督检验中心,重庆401120 [2]大连理工大学化机学院,辽宁大连116024

出　　处：《压力容器》2014年第4期1-6,74,共7页Pressure Vessel Technology

基　　金：国家质检总局科技计划项目(2012QK373)

摘　　要：为了研究复合材料层表面缺陷对于CNG-2复合气瓶爆破压力的影响,通过考察实际的表面缺陷形状,将复合层表面缺陷简化为一定尺寸的矩形槽。对带有2 mm深度矩形槽型缺陷的复合气瓶进行爆破试验,并利用有限元数值计算软件ANSYS计算其爆破压力,以分析2 mm深矩形槽型缺陷对气瓶爆破压力产生的影响及其原因。结果表明,矩形槽型表面缺陷对于气瓶内衬应力的影响并不明显,而对缠绕层应力影响较大,缠绕层矩形槽型缺陷底面的应力超过复合材料抗拉强度保证值,使得复合气瓶爆破压力减小。The simplification about surface defects on the CNG-2 composite cylinder to a certain size rectangular groove was made through the actual shape of the surface defect inspection.Burst test and finite element analysis by FEM software ANSYS were made to study the impact of 2 mm deep rectangular groove surface defect to the CNG-2 composite cylinder′s burst pressure.It was concluded that the impact of 2 mm deep rectangular groove surface defect to the stress of cylinder liner was not obvious,while the impact to composite wound layer was significantly.The stress of the bottom of 2 mm deep rectangular groove sur-face defect exceed the guaranteed value of composite tensile strength made the composite cylinder′s burst pressure decrease.

关 键 词：CNG-2复合气瓶 表面缺陷 爆破压力 有限元分析 

分 类 号：TH142.2[一般工业技术—材料科学与工程] O241.82[机械工程—机械制造及自动化]