Strain is the relative change in length of material when subjected to stress; bonded wire strain gauge is a device that is used to measure the strain. The device measures strain in terms of resistance which is affected by a metallic foil design within the device. Whenever the foil is distorted, electrical resistance changes. This resistance is related to strain directly. This paper will discuss bonded wire strain gauge with regards to its discovery, evolution and applications.
Operation of a strain gauge
When an object is subjected to a stretching force it stretches. When a strain gauge is attached to that object, the foil stretches too. The effect ...