内压载荷下玻璃纤维增强复合软管力学性能研究

对玻璃纤维增强复合软管进行短期爆破压力试验,建立内压载荷下玻纤软管有限元模型进行模拟仿真计算,在此基础上,研究提出了玻纤软管爆破压力的理论求解方法。将三者进行对比分析,结果表明:在一定内压作用下,加强层所受到的力远大于内外层,说明了玻纤软管的加强层承担大部分内压载荷;玻纤缠绕角度大于45°且小于80°时,抗内压能力逐渐增强,59°为玻纤软管设计中最优缠绕角度;适当减小管道的径厚比,可以提高管道承受内压的能力。

ANALYSIS OF FIBRE GLASS REINFORCED FLEXIBLE PIPES UNDER INTERNAL PRESSURE

A short-term burst pressure test is carried out and a 3D finite element model is established.An analytical solution of burst pressure of FGRFP is presented in the paper.The comparison of three methods shows that the stress of reinforced layers is much greater than that of inner and outer layers,indicating that the reinforced layers bear most of internal pressure.For the winding angle ranging from 45 to 80 degrees,the capacity to bear the internal pressure increases.The winding angle of 59 degrees of the reinforced layers is appropriate for the crossing section design.It is reasonable to reduce the diameter to thickness ratio of pipe for designing FGRFP.