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This research led to the invention of the strain gauge concurrent with the work of Edward E. Simmons at the California Institute of Technology. Notably, the Massachusetts Institute of Technology Patent Committee did not feel that the commercial use is likely to be of major importance.
An unmounted resistive foil strain gauge. A strain gauge takes advantage of the physical property of electrical conductance and its dependence on the conductor's geometry. . When an electrical conductor is stretched within the limits of its elasticity such that it does not break or permanently deform, it will become narrower and longer, which increases its electrical resistance end-to-
Strain gauges are used to monitor the applied loading or stress fields around the crack tip. They may be placed beneath the path of the crack or on the back face of a compact tension coupon. [6] An extensometer or displacement gauge can be used to measure the crack tip opening displacement at the mouth of a crack. This value can be used to ...
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Stress–strain analysis (or stress analysis) is an engineering discipline that uses many methods to determine the stresses and strains in materials and structures subjected to forces. In continuum mechanics , stress is a physical quantity that expresses the internal forces that neighboring particles of a continuous material exert on each other ...
6 Strain Gauge History. 2 comments. 7 The size of a strain gauge. 3 comments. 8 Introduction. 1 comment. 9 Physical operation. 3 comments. 10 Misleading lede? 1 comment.
A strain gauge sensor measures the deformation of the elastic element, and the output of the sensor is converted by an electronic circuit to a signal that represents the load. Capacitive strain gauges measure the deformation of the elastic material using the change in capacitance of two plates as the plates move closer to each other.
Though the Simmons was the first to invent the resistance wire strain gauge, both men are credited with the discovery and share the original patent. The trade name of the device, SR-4, which stands for “Simmons Ruge – 4 people,” acknowledges both men and indicates that four people (Simmons, Ruge and their respective assistants) were ...