0 025 mm thickness bonded directly to the strained surface by a thin layer of epoxy resin.
Strain gauge mathematics.
The gauge is attached to the object by a suitable adhesive such as cyanoacrylate.
Bonded foil strain gauges the first bonded metallic wire type strain gauge was developed in 1938.
Mechanical strain gauges are among the most straightforward in the way of making and measuring.
A strain gauge s conductors are very thin.
The metallic foil type strain gauge consists of a grid of wire filament a resistor of approximately 0 001 in.
Invented by edward e.
As the object is deformed the foil is.
When a load is applied to the surface.
Alternatively strain gauge conductors may be thin strips of the metallic film deposited on a nonconducting substrate material called the carrier.
If a metal piece is subjected to a tensile stress the metal length will increase and thus will increase the electrical resistance.
To learn more about the strain and stress measurement you can visit the strain measurement pro tutorial.
Types of strain gauges mechanical strain gauge.
Simmons and arthur c.
The method of measurement consists of measuring the elongation of the blades and reading this value on a scale magnified 1000 times transmitted by means of mechanical levers.
A strain gauge also spelled strain gage is a device used to measure strain on an object.
A strain gauge is basically used to measure the strain in a work piece.
Ruge in 1938 the most common type of strain gauge consists of an insulating flexible backing which supports a metallic foil pattern.
The latter form of the strain gauge is represented in the previous illustration.