CAJ | 학술논문

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。
위료연구복합재료층표면결함대우CNG-2복합기병폭파압력적영향，통과고찰실제적표면결함형상，장복합층표면결함간화위일정척촌적구형조。대대유2 mm심도구형조형결함적복합기병진행폭파시험，병이용유한원수치계산연건ANSYS계산기폭파압력，이분석2 mm심구형조형결함대기병폭파압력산생적영향급기원인。결과표명，구형조형표면결함대우기병내츤응력적영향병불명현，이대전요층응력영향교대，전요층구형조형결함저면적응력초과복합재료항랍강도보증치，사득복합기병폭파압력감소。
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.