By Resistance Strain Gauge?

The resistance strain gauge is a valuable tool in the field of experimental stress analysis. ... The resistive strain gauge is an important application of equation (20). Strain, δl/l, is the fractional change in the length of a body under stress, where δl is the change of length and l is the length.

How does a resistance strain gauge work?

A Strain gauge is a sensor whose resistance varies with applied force; It converts force, pressure, tension, weight, etc., into a change in electrical resistance which can then be measured. When external forces are applied to a stationary object, stress and strain are the result.

How do you calculate the resistance of a strain gauge?

If the nominal resistance of the strain gauge is designated as RG, then the strain-induced change in resistance, ∆R, can be expressed as ∆R = RG•GF•ε. Assuming that R1 = R2 and R3 = RG, the bridge equation above can be rewritten to express VO/VEX as a function of strain (see Figure 4).