平衡电桥法测量金属丝弹性模量

doi:10.14139/j.cnki.cn22-1228.2019.06.010

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摘要

金属丝在受到轴向拉力时，其长度与横截面积会发生微小的变化，其阻值也会发生相应的变化。利用惠斯登电桥测量出金属丝在拉伸时的阻值变化，设计了一种实验精度较高且操作简便的测量金属丝弹性模量的方法。

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	林春丹
	张程
	陈星洁
	何辛格
	张万松
	杨振清

关键词: 平衡电桥弹性模量金属丝

Abstract:

When the metal wire is subjected to axial tension, its length and cross-sectional area will change slightly, and its resistance will also change accordingly. A new method for measuring the elastic modulus of the metal wire with high precision and easy operation was designed according to the change in resistance of the metal wire during stretching with the Wheatstone bridge.

Key words: balanced bridge elastic modulus metal wire

出版日期: 2019-12-25 发布日期: 2019-12-25 整期出版日期: 2019-12-25

ZTFLH:

O435

引用本文:

林春丹, 张程, 陈星洁, 何辛格, 张万松, 杨振清. 平衡电桥法测量金属丝弹性模量 [J]. 大学物理实验, 2019, 32(6): 40-42.
LIN Chundan, ZHANG Cheng, CHEN Xingjie, HE Xinge, ZHANG Wansong, YANG Zhengqing. Measuring elastic modulus of metal wire by balanced bridge method . Physical Experiment of College, 2019, 32(6): 40-42.

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http://dawushiyan.jlict.edu.cn/CN/10.14139/j.cnki.cn22-1228.2019.06.010 或 http://dawushiyan.jlict.edu.cn/CN/Y2019/V32/I6/40

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