用光的衍射法测量杨氏模量  

Young's modulus measurement for a wire with diffraction method

作　　者：许巧平[1] 苏芳珍[1] 刘竹琴[1] 

机构地区：[1]延安大学物理与电子信息学院,陕西延安716000

出　　处：《实验技术与管理》2012年第10期101-102,共2页Experimental Technology and Management

基　　金：延安大学科研专项资助(YD2011-12)

摘　　要：提供一种利用光的衍射原理测量杨氏模量的新方法。利用2个刀片构成一狭缝,在激光照射下,形成夫琅禾费衍射。通过测量衍射条纹间距的变化,测出金属丝的伸长量。This paper proposes a new way, named Fraunhofer single slit diffraction method, to measure the Young.s modulus for a wire. When the laser passes through the single slit, the diffraction fringe is formed by the means of measuring the change of diffraction fringe, and the wire＇s elongation can be measured.

关 键 词：杨氏模量 单缝衍射 条纹宽度变化 

分 类 号：TG115.5[金属学及工艺—物理冶金] O436.1[金属学及工艺—金属学]