应用多元非线性回归方法建立FGH95合金的本构关系

Establishment of Constitutive Relationship for FGH95 Alloy Using Multiple Nonlinear Regression Method

通过等温恒应变速率压缩实验，按最小二乘法原理，采用多元非线性回归方法，建立了ＦＧＨ９５合金的本构关系。与多元线性回归结果对比表明，应用非线性回归方法建立的本构关系精度较高，物理意义明确。本文所用建立本构关系的方法具有适用性，可用于其它工程材料。

Based on the isothermal constant strain rate compression tests,the constitutive relationship for FGH95 alloy was established by using multiple nonlinear regression method Compared with that by using multiple linear regression method,it is found that the constitutive relationship proposed in the paper has clear physical background and high regression precision The method presented in this paper for establishment of constitutive relationship is universally applicable to engineering materials