Strain Gauge Material

A strain gauge also spelled strain gage is a device used to measure strain on an object.

Strain gauge material. One of the most popular materials used for the strain gauges is the. All strain gauges within a strain gauge series offer the same carrier and measuring grid foil material. As the material expands or contracts the long thin piece of metal gets longer or shorter with the material changing the resistance of the metal. Therefore many specifications are identical for one strain gauge series.

Earlier wire types of strain gauges were used commonly which are now being replaced by the metal foil types of gauges as shown in the figure below. A strain gauge fig. Further discussion on sensitivity can be found in the strain gage sensitivity page. Select constantan advance copel alloy wire if.

Invented by edward e. Simmons and arthur c. Applications are mainly static or quasi static strains. As the object is deformed the foil is.

The metals can be easily cut into the zigzag foils for the formation of the strain gauges. Thus a strain of 0 1 will cause a 0 24 ω change in a 120 ω strain gauge. For experimental tests robust and flexible strain gauges which can be used under arduous conditions have distinct advantages. The material construction of the wire directly affects the sensitivity of the strain gage.

The sensitivity of metal strain gauges can be 10 6 strain. Metal strain gauges have a gauge factor of about 2. Ruge in 1938 the most common type of strain gauge consists of an insulating flexible backing which supports a metallic foil pattern. 12 is a sensor which responds to the expansion or contraction of a material or the strain a strain gauge consists of a long thin piece of metal which folds back on itself or zig zags across the sensor.