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Strain gauges are available in a variety of models to cover
most strain measurement applications. Their rugged construction
and flexibility make them suitable for highly accurate static and
dynamic measurement. The measuring grid is formed by etching
constantan foil, which is then completely sealed in a carrier
medium composed of polyimide film.
Our Stress Relief or Residual Stress pattern strain gauges are mounted onto a test piece that is already stressed. Instrumentation is attached to all 3 elements in the rosette pattern. The stress relief is determined by unloading the test specimen by boring-out or drilling a small hole in the centre of the strain gauge. By removing material you are releasing the stress and measuring the relaxed residual stress in the vicinity of the hole. Hole depth and diameter is 1.87 mm