A bimetallic strip, also called bimetal strip could consist of a strip of brass and a strip of steel welded together. The strip is normal or does not experience expansion at some reference temperature. When the strip is heated, brass expands more than iron. This expansion will make the strip bend toward the iron. When the strip is cooled, brass contracts more than iron.
Bimetallic Strip Thermometers - How Thermometers Work | HowStuffWorks
All metals expand and contract with temperature and their linear relationship makes these changes entirely predictable, which means you can be confident that your calculated dimensions at any temperature will be achieved in reality. For example, the differential growth of two dissimilar metal strips that have been fixed together and heated will generate a longitudinal curve of known radius. Such a component is generally referred to as a bi-metallic strip and used for heat activated switches. Moreover, it is possible to install a heated or cooled component in or around a housing that has been machined to prevent the component returning to its original dimensions when cooled or reheated , locking them together via residual stress. This procedure is used to install high-strength liners in aluminium blocks such as for internal combustion engines. Heat Shrink includes three calculation options; one for longitudinal strips and two for heated or cooled sleeves. The bi-metal strip calculation option not only determines the radius achieved by the heated bi-metallic strip and the resulting shear force between the two metals, it also calculates the free growth of each metal strip, which means that Heat Shrink can also be used to calculate the growth of a single piece of metal.
The bimetallic strip
Documentation Help Center. This example shows how to solve a coupled thermo-elasticity problem. Thermal expansion or contraction in mechanical components and structures occurs due to temperature changes in the operating environment. Thermal stress is a secondary manifestation: the structure experiences stresses when structural constraints prevent free thermal expansion or contraction of the component. Deflection of a bimetallic beam is a common physics experiment.
Temperature is the most frequently measured factor in industrial and commercial settings. There are different kinds of industries that rely on the temperature process in a certain range like processing of food, manufacturing of paper, cold storage, pharmaceuticals, etc For that, there are various types of sensing devices are used to detect the temperature in the industries. So temperature detecting device like thermometer plays a key role in the industries due to the reasons like flexible, reliable and economical.