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拉伸试验是金属材料质量检验的重要手段之一。如何保证试验结果的准确性已成为人们所关注的课题。众所周知,试样的几何因素是个重要因素。但各国对拉伸试样的几何尺寸、形状等的规定却存在差别,因此有必要对此进行探讨,便于国际交往和进出口材料检验的顺利进行,也有利于国内各生产和使用单位之间的相互了解。本文针对试样形状变化、宽度变化、不同平行长度对拉伸试验性能的影响进行了讨论:同时用光弹方法研究了板状样过渡圆弧半径及试样夹持部位等因素对拉伸试验结果的影响。
Tensile test is one of the important means of quality inspection of metal materials. How to ensure the accuracy of test results has become a topic of concern. As we all know, the geometry of the sample is an important factor. However, there are differences in the regulations on the geometrical dimensions and shapes of tensile specimens in various countries. Therefore, it is necessary to conduct discussions on this to facilitate the smooth conduct of international exchanges and the inspection of import and export materials as well as to facilitate the cooperation between domestic production units and domestic units Mutual understanding. In this paper, the influence of sample shape change, width variation and different parallel length on the tensile test performance is discussed. At the same time, the influence of the plate-like transition arc radius and sample holding position on the tensile test Effect of the result.