What is a strain gage?
Every day engineers are building lighter and more efficient structures that still manage to maintain strict safety and durability standards.
To achieve this balance of safety, durability and efficiency, engineers use strain gages to measure stress limits of their raw materials.
Strain gages can monitor the amount of surface stress that a material can handle
A typical strain gage is made up of 3 layers
- A protective laminate top layer
- A thin metallic sensing element
- A Plastic film base
When a strain gage is bonded to a surface under stress, it will distort or flex in unison with that surface,
causing a shift in electrical resistance proportional to the strain applied to the surface.
Strain gages come in many different configurations. Choosing the right strain gage for your application depends on which direction the primary strain is running, what type of strain you are measuring and the target measurement area.
Hopefully this video will take some of the stress out of strain
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