Calculating Tensile Stress Using a Strain Gauge

Thread starter orla22
Start date May 15, 2009
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Gauge Strain Strain gauge Stress Tensile Tensile stress

AI Thread Summary

To calculate the tensile stress using the strain gauge, first determine the change in resistance, which is 0.13 ohms (120.13 - 120). The gauge factor of 2.0 indicates that the relative change in resistance is twice the strain. Therefore, the strain can be calculated as the change in resistance divided by the gauge factor, resulting in a strain of 0.065. Finally, tensile stress can be calculated using the material's modulus of elasticity, applying the formula: tensile stress = modulus of elasticity × strain. This method effectively relates the resistance change to the tensile stress experienced by the steel girder.

May 15, 2009

orla22

A strain gauge has a unstrained resistance of 120 ohms, gauge factor of 2.0 is connected to steel girder so it experieces tensile stress. If strained resistance of gauge is 120.13 ohm. How do i calculate the tensile stress value?

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May 15, 2009

jasc15

The Gauge Factor is the ratio of the resistance change to the strain change. In this case, the relative change of the resistance of the gauge is twice as large as the strain of the sample.

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