The steel - fibre reinforced concrete ( sfrc ) is a new kind of multiply - composite material , and the short steel fibres are distributed disorderly in the concrete . the main function of the short steel fibres is to hinder the expandance of inner microscopic and macroscopic cracks in the concrete . therefore , sfrc is used extensively in building highway and airport pavement . with the extensive applyment of sfrc , the experiment and research of it has been concerned and valued by the scholars of internal and overseas 钢纤维混凝土是在普通混凝土中掺入乱向分布的短钢纤维所形成的一种新型的多相复合材料,其中乱向分布的短钢纤维主要作用是阻碍混凝土内部微裂纹的扩展和阻滞宏观裂缝的发生和发展。因此,在修筑公路路面和机场道面中得到广泛的应用。随着钢纤维混凝土这种新型复合材料的广泛应用,对钢纤维混凝土的试验与研究也日益受到国内外学者的关注和重视。
The results indicate that a stable deformation localization band occurs in the coal cutting course and develops to macroscopic crack ; the deformation localization band is slantwise ; while the cutter tooth is used , the deformation localization develops slowly , and the localization becomes wider and the strain value in the band area higher afterwards ; when the point - attack pick used the localization develops quickly and the localization band becomes narrow and the strain value in the band lower 研究表明:截齿截割煤体过程中,煤体出现稳定的变形局部化带,且最终发展为宏观裂纹;煤体变形局部化带为一个倾斜带:刀齿截割时,变形局部化发展较慢,但产生变形局部化后,局部化带宽且带内应变值较高;而镐齿截割时,变形局部化发展较快,但产生局部化后,局部化带窄且带内应变值不如刀齿高。