Strain Gauge Material

Select constantan advance copel alloy wire if.

Strain gauge material.

The material construction of the wire directly affects the sensitivity of the strain gage. 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. Invented by edward e. The metals can be easily cut into the zigzag foils for the formation of the strain gauges.

The sensitivity of metal strain gauges can be 10 6 strain. 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. 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.

One of the most popular materials used for the strain gauges is the. Further discussion on sensitivity can be found in the strain gage sensitivity page. Applications are mainly static or quasi static strains. Simmons and arthur c.

A strain gauge also spelled strain gage is a device used to measure strain on an object. Specialized semiconductor strain gauges based on silicon have gauge factors of 50 to 200 but these devices are nonlinear making them more difficult. Therefore many specifications are identical for one strain gauge series. As the object is deformed the foil is.

A strain gauge fig. The gauge is attached to the object by a suitable adhesive such as cyanoacrylate. 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. Materials used for the strain gauges.