大学物理 ›› 2014, Vol. 33 ›› Issue (4): 18-18.

• 著者文摘 • 上一篇    下一篇

金属的杨氏模量测定研究

马玉利[1] 戴心锐[2]   

  1. [1]重庆工业职业技术学院自动化系,重庆401120 [2]重庆大学物理学院,重庆400030
  • 出版日期:2014-04-25 发布日期:2014-04-20

Determination of Young's modulus of metals

  • Online:2014-04-25 Published:2014-04-20

摘要: 金属丝在拉伸力的作用下长度会发生微小变化,金属丝长度的微小变化会使其电阻同时发生微小改变,利用双臂电桥测量低阻值电阻的原理测金属丝电阻的微小变化量,再通过相应的公式求得被测金属丝的杨氏模量,该方法简便,测量准确.

关键词: 杨氏模量, 双臂电桥

Abstract: The length of metal wire changes under the action of tensile force, the tiny changes of the metal wire length makes its resistance tiny changes at the same time. Using the principle for double bridge measuring low Ohm value resistance to measure the tiny variation of metal wire resistance, we calculate the Young's modulus of metal wire by using the corresponding formula, This method is simple and accurate.

Key words: Yang's modulus, double bridge

中图分类号: 

  • O4-33