Strain Gauge Material

All strain gauges within a strain gauge series offer the same carrier and measuring grid foil material.

Strain gauge material.

A strain gauge fig. 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. 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. Therefore many specifications are identical for one strain gauge series.

The metals can be easily cut into the zigzag foils for the formation of the strain gauges. Ruge in 1938 the most common type of strain gauge consists of an insulating flexible backing which supports a metallic foil pattern. Further discussion on sensitivity can be found in the strain gage sensitivity page. The material construction of the wire directly affects the sensitivity of the strain gage.

Simmons and arthur c. Select constantan advance copel alloy wire if. As the object is deformed the foil is. The sensitivity of metal strain gauges can be 10 6 strain.

One of the most popular materials used for the strain gauges is the. For experimental tests robust and flexible strain gauges which can be used under arduous conditions have distinct advantages. Metal strain gauges have a gauge factor of about 2. Invented by edward e.

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. The gauge is attached to the object by a suitable adhesive such as cyanoacrylate. Applications are mainly static or quasi static strains. Thus a strain of 0 1 will cause a 0 24 ω change in a 120 ω strain gauge.