Four strain gauges are bonded onto a cantilever as shown in Figure 8.20(a). Given that the gauges are placed halfway along the cantilever and the cantilever is subject to a downward force of 0.5 N, use the data given below to calculate the resistance of each strain gauge: Strain gauge data Gauge factor Unstrained resistance R, = 120 Q Cantilever data 1 = 25 cm w = 6 cm t = 3 mm Young's modulus E = 70 × 10° Pa Length G = 2.1 Width Thickness

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
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This question from measurements instrumentation course. The pic two is for figure 8.20(a).
1 3
te
4
2
Figure 8.20 Practical
elastic sensing elements
using strain gauges:
F
(a) Cantilever load cell
Transcribed Image Text:1 3 te 4 2 Figure 8.20 Practical elastic sensing elements using strain gauges: F (a) Cantilever load cell
Four strain gauges are bonded onto a cantilever as shown in Figure 8.20(a). Given that the
gauges are placed halfway along the cantilever and the cantilever is subject to a downward
force of 0.5 N, use the data given below to calculate the resistance of each strain gauge:
Cantilever data
Length
Width
1= 25 cm
w = 6 cm
Strain gauge data
Gauge factor
Unstrained resistance R, = 120 Q
G= 2.1
Thickness
t = 3 mm
Young's modulus E = 70 × 10° Pa
Transcribed Image Text:Four strain gauges are bonded onto a cantilever as shown in Figure 8.20(a). Given that the gauges are placed halfway along the cantilever and the cantilever is subject to a downward force of 0.5 N, use the data given below to calculate the resistance of each strain gauge: Cantilever data Length Width 1= 25 cm w = 6 cm Strain gauge data Gauge factor Unstrained resistance R, = 120 Q G= 2.1 Thickness t = 3 mm Young's modulus E = 70 × 10° Pa
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