利用箔式应变片测量金属丝杨氏模量  

Experimental design of measuring Young's modulus using foil strain gauges

作　　者：郑雪丽[1] 邱丽 汪涛[1] 沈靖皓 雷迪 李巧梅[1] 杨骏骏 ZHENG Xue-li;QIU Li;WANG Tao;SHEN Jing-hao;LEI Di;LI Qiao-mei;YANG Jun-jun(College of Physics,Chongqing University,National Demonstration Center for Experimental Physics Education,Chongqing 401331,China;College of Aeronautics and Astronautics,Chongqing University,Chongqing 401331,China)

机构地区：[1]重庆大学物理学院物理国家级实验教学示范中心,重庆市401331 [2]重庆大学航空航天学院,重庆市401331

出　　处：《大学物理》2021年第5期20-23,共4页College Physics

基　　金：2019年重庆市高等教育教学改革研究项目(193008);2018年重庆大学教学改革研究立项项目(2018Y55);2019年重庆大学实验教学改革项目(2019S08);2020年重庆大学教学改革研究立项项目(2020Y50)资助。

摘　　要：杨氏弹性模量测量实验是各高校必开的经典物理实验之一.现阶段各高校实验中大都采用镜尺组测量杨氏模量,提出用箔式应变片测量杨氏弹性模量,该方法将电学和力学知识结合在一起,增强学生综合实验能力,提高创新意识.在测量时先采用精密位移平台定标,然后测量加力后惠斯通电桥输出电压值.测量数据和数据处理结果表明方法稳定性好、精度高,适合运用到实际教学中.The measurement of Young's elastic modulus is one of the classic physics experiments required in universities.At present,the method using mirror ruler group to measure the Young's modulus was adopted in most colleges and universities.Based on this,it is proposed to measure Young's modulus with foil strain gauge in this paper.This method combining with the electrical and mechanical knowledge so as to enhance students'comprehensive experimental abilities and increase their awareness of innovation.During the measurement,a micrometer with higher accuracy is used first to calibrate,and then the output voltage value of the Wheatstone bridge is measured after forcing.From the measured data and data processing results,the method shows a good stability and high accuracy,and was suitable for practical teaching.

关 键 词：应变片 惠斯通电桥 杨氏弹性模量 综合设计 

分 类 号：O4-34[理学—物理]