[領域] 碩一材料

[來源] 大葉的機械碩專班-智慧型材料習題(朋友分享)

[題目]

Example 1:
Assume the piezoceramic sensor BM400 Type I dimensions W=12.7mm, L=38.1mm,
T=0.5mm). The catalog parameters are g31=-10.5E-3 (Vm/N), E=8E10 (N/m^2) and
c=11.95E-9 [F/m]

Calculate : (a) the capacitance C, (b) the piezoelectric coefficient d31 and
            (c) the voltage V when the sensor is subject to a 10^-6 [m] axial
                deflection.

Example 2 : Accelerometer Transducer
Given data : m=10^-3 kg, b=0, k=7.74*10^10 N/m, cWLg33E=1.16*10^-2 C/m,
             Rc=10^10Ω and Cc=10^3 pF, calculate
(1) the steady-state voltage v response to an acceleration step input of
    magnitude a=2 [m/s^2];
(2) the time constant.

[瓶頸]   講義上只供這個公式: V=g31*σ1*T = g31*E*T*(△L/L)
         不知從何解題。

幫朋友po的，以上麻煩版友們幫忙解題，萬分感謝!

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