Write 5 pages with APA style on Strain Gauge Calibration. When an electrical conductor is stretched to the limits of its elasticity ensuring that it does not break or deform on a permanent basis, it becomes longer and narrower, changes that increase its electrical resistance end-to-end. Alternatively, when a conductor is compressed, but to an extent that it does not buckle, the effect will be only be broadening and shortening. This effect only decreases electrical resistance end-to-end. Out of the measured electrical resistance of the strain gauge, the amount of applied stress may be calculated. An ordinary strain gauge arranges a long, thin conductive strip in a zigzag pattern of parallel lines in a way that a small amount of stress in the direction of the orientation of the parallel lines results in a multiplicatively larger strain determination over the total effective length of the conductor surfaces and this is with respect to the conductive lines and therefore a multiplicatively more significant change in the resistance is noted compared to when observed with a single straight-line conductive wire. The strain gage is among the most widely used strain measurement sensors. The strain gauge is a resistive elastic unit whose change in resistance is termed as a function of applied strain (Northrop, 2005).Among the several strain gauges, an electric resistance wire strain gage stands the privilege of lower cost and being an established product. This makes it a commonly used type of device. Other types of strain gages include the acoustic, the capacitive, the inductive, the mechanical, and the semi-conductive. A wire strain gage is constructed by a resistor, made in the metal foil form, and commonly bonded to an elastic backing. The principle of a strain gauge is based on the fact that the resistance of a wire increases with an increase in strain and decreases with a reduction in stress. The composition of the wire is a uniform conductor with parameters electric resistivity r, length l, and cross-section area A. the resistance R is a function of the geometry that is given by the formula.
