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Hein Beam Defelction Lab Report

Hein Beam Defelction Lab Report - Beam Deflection Professor...

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Beam Deflection Professor Ananda Mysore ME120 Experimental Methods San Jose State University Department of Mechanical and Aerospace Engineering 27 October 2009 Abstract The goal of this lab was to use a linear variable differential transformer (LVDT) to measure the deflection of a metal beam when various loads were applied to the end. Masses were connected to the end of the beam and deflection values were recorded into
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LabVIEW. These values were compared to values calculated using the deflection equation. Percent differences were found to be fairly constant between 15% and 20% for all measurements suggesting systematic calibration error. To verify, a large mass was weighed and the deflection was measured manually and then found using FEA to cross reference the values taken using the LVDT. Tables showing deflection values were plot to allow for interpretation of the data. Background and Objectives All materials deflect when a force is applied and factors that influence the amount a specimen deflects is the material itself, the geometry of the component, the load applied as well as where it is applied to the component. There are many different ways to record the amount a material deflects. Sometimes it can be measured with a ruler or calipers, or in small scale deflections, with optical sensors or strain gauges. Deflection can also be measured with position sensors if the geometry allows for easy integration.
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