材料弹性模量小型冲压实验测试的理论公式

采用简化的薄板弯曲理论模型，导出了小型冲压弹性模量测试实验中弹性模量的一个理论计算公式，针对该公式误差较大的现象，采用有限元分析方法研究了误差产生的原因，并提出了该公式的修正方法，求得了修正系数，建立了一个新的弹性模量的计算公式。通过验证，该公式具有很好的精度和较好的普适性，可应用于小型冲压弹性模量测试实验。

A New Formula for Elastic Modulus in Small Punch Test

First,we adopted the model of simplified bending theory of thin plane,secondly a theoretical calculation formular about the elastic modulus through the small punch test was deduced.According to the situation that the error of the formulation was big,by using the FEM to investigate the cause of the error, we gave a new calculation formulation about elastic modulus,and the amendatory coefficient was obtained.Then a new calculation formulation about elastic modulus was developed.Through verifying,the formulation posed a better precision,and could be used in the small punch test.