杨氏模量实验的改进

Improvement on the Experiment of Measuring Young's Modulus

伸长法测定杨氏模量实验通常采用光杠杆来测量钢丝形变,存在间接测量量较多、调整仪器和测量时间较长等缺点.具体实验数据及其不确定度的分析证明,采用百分表直接测量钢丝的伸长量可以有效克服这些缺点.

In the traditional experiment of measuring Young＇ s modulus with optical lever to measure the wire deformation by stretching, there are more indirect measurements, the time for adjusting the instruments and measuring is longer, and other shortcomings. The analysis of the experimental data and uncertainty analysis has shown that, the way using dial indicator to directly measure the wire elongation can be effectively overcome these shortcomings.