钢丝扭转系数与张力的关系

摘要

In order to study the relationship between a steel wire' s torsion coefficient and tension, a torsional pendulum was modified and periods of rotation were measured under the condition of the same 360 degrees and different tension. By analysing and processing experimental data, the relationship curve of a steel wire' s torsion coefficient and tension was acquired, and that was fitted with Matlab. The results indicate that torsion coefficient of a steel wire decrease with the increase of tension, and tend to be 5.95 x 10~ J when the tension is more than 18. 87N%为了认识钢丝的扭转系数与张力之间的关系,改装了扭摆实验装置,测量了旋转角度同为360°下不同张力时的旋转周期,通过实验数据处理分析得到了钢丝扭转系数与张力之间的关系曲线,并应用Matlab软件对实验数据进行拟合.研究结果表明钢丝扭转系数随着张力的增加而逐渐减小,当张力大于18.87 N时,其值趋于稳定,大小为5.95 ×10-5 J.