根据莫尔条纹的位移放大原理，利用在光栅栅距恒定时栅线夹角与莫尔条纹的宽度在小角度情况下成反比 的关系，对钢丝杨氏弹性模量进行测量.通过对测量数据及计算结果的分析，得出结论: 莫尔条纹的宽度随夹角增大而 减小; 测量误差随着光栅夹角增加而增大，但小于5%.并将实验值与理论值相比较，确定莫尔条纹法测量杨氏模量的可 行性.

Based on the principle of the displacement amplification of the moire，and under the circumstance of constant grating pitch when the angle is very small，between the gate lines is proportional inversely to the width of the moire，Young's modulus of the steel wire is measured. Then，through the analysis of the measured data and calculated results，we have reached a conclusion: the width of the moire decreases with the increase of the angle;the measurement deviation increases as the moire grating angle increases，but less than 5%. Finally，the experimental and theoretical values are compared to determine the feasibility of the methodology of moire fringe measuring Young s modulus