拉伸法测弹性模量数据处理.docx

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1、用拉伸法测金属丝的弹性模数据处理1数据处理(1)光杠杆法测钢丝微小长度的变化:单位：cmn刁nin71诵4nf17.006.906.9553.443.463.453.5026.066.026.0462.552.592.573.4735.165.175.1771.651.851.753.4244.344.224.2880.700.720.713.5741(n=4)J7=-=3.49cmI(rz-f)2f-=0.03cmA，,w(w-1)A”：747二(3490.03)cm%二001mm(2)钢丝直径：J=0.601mmA仪=0.005mmj=0.003mmdd-(0.6010.003)mm(3)

2、光杠杆小镜前后脚距离：A仪=。2nun单位：mm次数123456bj=b-b()73.6073.5073.4873.4873.5073.446Zbi(n=6)b-=73.50n一勺?(b-02=0.022mmn(w1)J3+(隼*=j0.0222+(iy=0.03mmV3V3,=(73.500.03)mm(4)其它数据：D=199.83cm取=0.5cmDo=199.80.5cm1=98.80cm取Cr1=O2cm1z=98.80.2cmm,n=(4.OOO土0.004)kg2.误差计算过程：SmgD1Ess-2-d二8x4.000x9.794x199.8x98.8x10-43.1420.601273.503.491(11=2.1410,1Nm2OE一8+其E可jT_I-i7T丁+q-TThT_-2E川0212-2-2-2z0.0042/0.5、2z02、2*0003、2/0.03二z0.03x2(Y+(Y+()+4()+(+(Y.4199.898.80.60173.503.49=1.38%aE=2.1410111.38%=0.03101,Nn2实验结果：Ef=(2.140.03)10,iVw2