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本文介绍了云纹干涉法基本原理,推导了利用等位移线——云纹条纹计算弹性模量的公式(包括纯弯曲梁和三点弯曲梁两种情况) ;还给出了测定光栅频率的几何法,利用单束准直光的斜射法,采用全息胶片的贴片法;这些方法的应用,使测定设备和过程大大简化。最后介绍了作者用云纹干涉法测定有机玻璃、氧化铝陶瓷和A3钢等材料的弹性模量的结果,并与其他方法作了对比,阐述了这一方法的优点。
This paper introduces the basic principle of Moiré interferometry, derives the formula of elastic modulus calculated by Alignment line - moiré fringe (including two cases of pure bending beam and three bending point beam) Geometric methods, oblique methods that utilize a single beam of collimated light, holographic film patch methods; the use of these methods greatly simplifies the measurement equipment and processes. Finally, the authors present the results of Moiré interferometry for the determination of the elastic moduli of materials such as Plexiglas, alumina ceramic and A3 steel, and compared with other methods, the advantages of this method are expounded.