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本文介绍了一种改进的试样,以减少抗压试验时端面摩擦力的影响,使试样在整个试验过程中保持圆柱体形状不变。一、前言在进行抗压试验时,由于圆柱试样的端面与压头之间摩擦力的存在,使抗压后的试样呈腰鼓形,从而造成试样的两端面和中间变形极不均匀,影响了抗压试验的结果。长期以来,为了克服摩擦力的影响,国内外科技工作者进行了许多研究。例如有人提出用改变试样端面形状的方法满足公式:
In this paper, an improved sample is introduced to reduce the influence of the friction of the end face during the compression test so as to keep the shape of the cylinder constant throughout the test. I. Preface In the compression test, due to the friction between the end face of the cylindrical specimen and the pressure head, so that the sample was drum waist-shaped, resulting in the sample both ends and the middle of the deformation is extremely uneven , Affecting the results of the compression test. For a long time, in order to overcome the influence of friction, scientists at home and abroad conducted many researches. For example, someone proposed to change the shape of the sample surface to meet the formula: