Physics

Physics, 28.11.2019 06:31, Serenitybella

Which of the following is correct regarding strain gauges or rosettes? which of the following is correct regarding strain gauges or rosettes? if two gauges are placed along the +x and –x axes, respectively, their readings have the same magnitude but opposite signs. the readings by the gauges in a rosette must have the same sign. the shear strain can be measured by a strain gauge directly. none of the options are correct

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Physics, 03.07.2019 02:30, catwomn

Asteel bar has cross-sectional area a=10-3 m2, young modulus e= 2 x 1011 pa and poisson’s ratio of 0.4. the steel bar has a rectangular cross sectional area. a. if the bar is subject to a compressive force of 105 n, find the corresponding longitudinal and transverse strains. [3 marks] b. two strain gauges, each with unstrained resistance of 120 ω and a gauge factor of 2.0 are bonded on to the top surface of the steel bar. determine the corresponding gauge resistance for the longitudinal and transverse strains. [4 marks] c. draw a diagram that show how the strain gauges are placed on the bar and to which resistor location of the wheatstone bridge is each of them connected. assuming that you have another two additional strain gauges with the same specifications, how would you place these additional strain gauges and draw the set-up of the 4 strain gauges together with the wheatstone bridge. [3 marks]

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Engineering, 26.11.2019 03:31, araminaara691

Two strain gauges are mounted so that they sense axial strain on a steel member in uniaxial tension. the 120 v gauges form two legs of a wheatstone bridge, and are mounted on opposite arms (e.g., arms 1 and 4). the gauge factor for each of the strain gauges is 2 and e m for this steel is 29 ã 106 psi. for a bridge excitation voltage of 4 v and a bridge output voltage of 120 î¼v under load (i.e., ei = 4 v and 0 ï¤ e =120 î¼v ): (a) estimate the maximum strain.(b) what is the resistance change experienced by each gauge?

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