玄武岩复材管道轴向拉伸力学性能研究

RESEARCH OF THE MECHANICAL PROPERTIES OF BFRP PIPELINES SUBJECTED TO AXIAL TENSILE

采用缠绕工艺制作了公称直径为300,500,1 000 mm的玄武岩纤维增强复合材料(BFRP)管道,沿BFRP管道的轴向进行取样并制备成拉伸试件,对试件进行静力拉伸试验,考察BFRP管道轴向抗拉强度、弹性模量和断裂延伸率,分析BFRP管道轴向抗拉强度、弹性模量和断裂延伸率的概率分布类型。结果表明:3种公称直径的BFRP管道轴向抗拉强度、弹性模量和断裂延伸率基本相当,对应的变异系数随公称直径的增加呈增大趋势;其轴向抗拉强度、弹性模量和断裂延伸率均服从正态分布和Weibull分布,但正态分布的拟合优度均更高。建议BFRP管道轴向抗拉强度、弹性模量和断裂延伸率的概率分布类型均采用正态分布。

For basalt fiber reinforced plastic ( BFRP ) pipelines made of filament winding with nominal diameter of 300 mm ( thickness is 6 mm), 500 mm (thickness is 8 mm ) and 1 000 mm ( thickness is 15 mm ), samples were taken along the axial of the pipelines to perform a static tension test. The axial tensile strength, elastic modulus and fracture elongation of the BFRP pipeline were investigated, and the probability distribution type of the axial tensile strength and the elastic modulus were analyzed. The results showed that the axial tensile strength, elastic modulus and fracture elongation of the three nominal diameter BFRP pipelines were basically the same, and the corresponding coefficient of variation increased with the increase of the nominal diameter;the axial tensile strength , elastic modulus and fracture elongation were subject to the normal distribution and Weibull distribution, but the goodness of fit of the normal distribution was higher. It was recommended that the probability distribution type of the axial tensile strength, elastic modulus and fracture elongation of the BFRP pipeline should adopt a normal distribution.