Design of a Cantilever Beam in a Load Cell
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Abstract
Load cells used in many applications, especially those involving weight measurement, work through measurement of strain by a strain gauge attached to a load bearing beam. This article describes a design of a load bearing cantilever beam which has a constant high strain on the surface of its middle part. This will simplify the processes of attaching the strain gauge and of load cell calibration. The shape of the beam is determined by elementary beam theory to have the desired strain. A finite element program is used to calculate the real strain and stress. It is found that the middle part of the beam indeed has constant high surface strain close to the designed value.
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References
W.R. Murray and W.R. Miller. 1992. The Bonded Electrical Strain Gauge: An Introduction. Oxford University.
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R.C. Hibbeler. 2010. Mechanics of Solids, 8th ed. Pearson Prentice Hall.