玄武岩纤维的强度及其离散性研究

Study on Tensile Strength and Variation of Basalt Fibers

对一种国产玄武岩连续纤维的拉伸强度进行了分析,采用Weibull统计理论对玄武岩纤维的抗拉强度离散性进行评价,探讨了体积效应和玄武岩纤维强度分布离散情况之间的关系.结果表明:玄武岩纤维的拉伸强度及其离散性均受到体积效应的影响,随着试样长度增加纤维强度逐渐下降、强度的离散性则逐渐增加;同时,随着试样细度的增加,玄武岩纤维的强度逐渐减小,但细度变化与强度离散之间无一定的规律.

The tensile properties of a kind of China-made continuous basalt fibers are analyzed. The scattering of the tensile strength of the basalt fibers is evaluated using Weibull Statistical theory in order to discuss the relationship between the size effect and distribution of the tensile strength of the basalt fibers. The tensile strength as well as the scattering of the basalt fibers is influenced by the size effect. The tensile strength of the basalt fibers decreases and its scattering increases with the increase of the length of fiber samples; on the other hand, the tensile strength of the basalt fibers decreases with the increase of the fineness of fiber samples, but the relationship between the fineness and scattering of the tensile strength is irregular.