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guan yu v(r) ji suan fang fa de tao lun
Pages: 106-108
Year: Issue:  3
Journal: Research on Iron and Steel

Keyword:  计算方法标距长度精确度测量精度宽度测量塑性应变比误差传递理论金属薄板拉伸变形变异系数;
Abstract: <正> 金属薄板塑性应变比 r 值是一个导出量。它的测定精确度有赖于拉伸变形前后试样标距长度10、1和宽度 b0、b 的测量精度。如果分别用标准偏差 S(x)和 v(x)表示测量某物理量 X 的绝对和相对精确度,则根据 r 值的定义及误差传递理论,其测定精确度可用下式表达:
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