ASTM E 837标准20版与08版和13版的主要差异对比

Comparative Analysis of ASTM E 837-08, ASTM E 837-13 and ASTM E 837-20 Edition Standards

  • 摘要: 通过对ASTM E 837-08、ASTM E 837-13和ASTM E 837-20版标准进行对比分析发现:根据工件厚度等因素的不同,ASTM E 837-20对残余应力测量方法的描述最全,补全了08版和13版缺乏的中等厚度工件的测量方法。同时 20版通过采用几种常用的钻孔直径、钻孔深度和工件厚度的规制化设计方案,引入孔径系数、应力深度系数和工件厚度系数,新增孔径系数计算公式、应力深度系数和工件厚度系数等计算公式等来简化计算实际孔径、实际应力深度和实际工件厚度条件下的应力释放标定常数,删减了大量繁琐的查表工作,方便了标准使用者的理解与操作。另外20版对工件厚度、钻孔钻速下限、钻孔偏心距离和测量结果适用范围的规定,与08版和13版相比,也有差异,总体是放松了要求,扩大了该标准的使用范围。总体而言,ASTM E 837-20标准的适用性和可操作性大大提高,逻辑性更加清晰。

     

    Abstract: Through the comparative analysis of ASTM E 837-08, ASTM E 837-13 and ASTM E 837-20 edition standards, it is found that ASTM E 837-20 has the most complete description of residual stress measurement method, which is added the measurement method of medium thickness workpiece that is lacking in the 08 and 13 versions. Besides, the version 20 adopts several commonly used regularization design schemes of hole diameter, hole depth and workpiece thickness, and introduces aperture coefficient, stress depth coefficient and workpiece thickness coefficient. The new calculation formulas of aperture coefficient, stress depth coefficient and workpiece thickness coefficient are added to simplify the calculation of the stress release calibration constant under the conditions of actual aperture, stress depth and workpiece thickness, and eliminate a lot of tedious table lookup work, which facilitates the understanding and operation of standard users. In addition, the specification of the version 20 on workpiece thickness, lower limit of drilling speed, drilling eccentricity distance and the scope of application of meas urement results has differences compared with those of the versions 08 and 13, and the version 20 lowers the requirements and expands the scope of use of the standard. In general, ASTM E 837-20 has improved its applicability and operability, and makes the logic more clear.

     

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