Question

Strain gages A, B, C, and D are mounted on a plate subjected to a simple bending moment M and an axial load F, as shown in Fig. 3. The bending strain, axial strain, and thermal strain on the upper surface are denoted ε_b, ε_a, ε_T, respectively. A bridge circuit (Fig. 4.) was built to sense the strains.

1. Write down the expression of measured strains by each gage
2. Presenting the output of the bridge circuit

Fig.3 DC Vo 0 Vs Fig.4

Answer 1

刁 RtA P