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介绍x(x_(σB))值的物理意义及实验方法,测定了十几种材料的x_(σB)值,并与r、LDR值进行对比分析。给出了x_(σB)值与LDR值间的近似公式。结论确认x_(σB))值代替LDR值来评定拉伸性能更有意义。
The physical meaning and experimental method of x (xB (xB)) values are introduced. The x_ (σB) values of a dozen materials are measured and compared with r and LDR values. The approximate formula of x_ (σB) value and LDR value is given. Conclusion It is more meaningful to confirm the value of x_ (σB)) instead of LDR to evaluate the tensile properties.