玄武岩纤维复合材料大型结构管道及典型连接结构件力学性能分析OA

To promote the application of basalt fiber reinforced polymer(BFRP)pipes in the field of marine aq-uaculture,the continuous basalt fiber/vinyl ester resin(BF/VER)composite wound pipes were selected as the re-search object.Two large diameter BF/VER wound circular pipes were chosen for the three-point bending failure test,and five types of straight joints and two types of T-joints were subjected to the pull-out mechanical test to measure the mechanical properties of the pipes and their typical joints.The results show that the maximum loads at the rupture of the two 10-meter long large-diameter BF/VER wound pipes are 128.9 kN and 190.54 kN respectively.The failure locations are within the range of 1 m to 1.5 m from the loading area,and there are significant differences in the results obtained by different loading methods.The pull-out test indicates that,apart from the pipe body,the socket type straight joint exhibits the best tensile performance,with an ultimate load of 1 223 kN,which only differs from the ten-sile performance of the pipe body by 6%.An increase in the adhesive layer thickness of the straight joint is beneficial for enhancing its tensile performance.The tensile performance of T-joints of the same size is related to whether a sad-dle shaped hole is opened.The tensile performance of the joint without a saddle shaped hole is 12.2%higher than that of the joint with a saddle shaped hole.