线性应变增量最佳值的确定

The Determination of Optimum Value of Linear Strain Increment

经过分析得知 ,在线性范围内采用等值增量法加载 ,试件上各测点的应变 ε与加载序数 n成线性关系 .因此 ,应用最小二乘法可以拟合一条最佳直线 。

Through analysis,we know in linear range,that the relation between the strain ε of a point in the specimen and the ordinal number n of loading is linear,under the condition of equal increment loading.Applying the law of least square,an optimum straight line is fitted,then the optimum value of strain increment Δε is determined.