• 2022-07-29
    ‎下图为等强度梁测力系统,R1为电阻应变片,应变式灵敏系数K=2.05,未受应变时,R1=120Ω. 当试件受力F时,应变片承受平均应变为800με,应变片电阻变化量ΔR1以及电阻相对变化量ΔR1/ R1分别为()‎‎[img=156x144]17de93107529b39.jpg[/img]‎
    A: 0.1968Ω,0.00164
    B: 0.1698Ω,0.00146
    C: 0.1468Ω,0.00164
    D: 0.1268Ω,0.00146
  • 举一反三