大学物理 ›› 2013, Vol. 32 ›› Issue (1): 18-18.

• 著者文摘 • 上一篇    下一篇

泊松比对拉伸法测材料杨氏模量的影响

牛晓东[1] 卢莉蓉[2] 袁小燕[1] 郭嘉泰[1]   

  1. [1]长治医学院基础部物理教研室,山西长治046000 [2]长治医学院生物医学工程系,山西长治046000
  • 出版日期:2013-01-20 发布日期:2013-01-20

Effect of Poisson's ratio on experiment of measuring Young's modulus of materials using stretched method

  • Online:2013-01-20 Published:2013-01-20

摘要: 用拉伸法测杨氏模量较小的圆形材料杨氏模量实验时,伴随材料的拉长,其直径将明显减小.此时,实验必须考虑材料直径的变化.以拉伸法测圆形硅胶的杨氏模量为例,将材料直径的变化通过泊松比转为材料伸长量,实验结果表明引入泊松比所测杨氏模量精确度提高,不确定度减小.

关键词: 拉伸法, 杨氏模量, 泊松比

Abstract: In the experiment measuring materials of Young's modulus using stretched method, its diametergradually decreases along with the length of it gradually stretches, so one needs to consider this problem. Taking the measurement of Young's modulus of the silica gel as an example, we convert the change of its diameter to its elongation. The experimental results of introducing Poisson's ratio show that the uncertainty decreases and the accuracy is improved.

Key words: stretched method, Young's modulus, Poisson's ratio

中图分类号: 

  • O4-33