Beam Bending Lab

Beam Bending Lab - Material Joining and Beam Bending...

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Material Joining and Beam Bending Engineering H191 Autumn, 2007 Andrew Grunenwald, Seat 35 Ashley Purdy, Seat 1 Matthew Murray, Seat 18 Rohit Abraham, Seat 24 Instructor: Paul Clingan Class Section: MTW 1:30 Lab GTA: Michael Vernier Lab Section: Thursday, 1:30-3:18 Date of Experiment: 11/01/07 Date of Submission: 11/08/07 1
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1. Introduction The purpose of this experiment was to test the deflection of three cantilever beams, one steel rectangular beam, one aluminum rectangular beam, and one aluminum beam with a box cross-section. This was done by measuring how much a given cantilever deflected when a load was applied to the end of the beam. Also in the lab, individuals learned how to weld PVC pieces together with PVC filler and a hot air gun. 2. Experimental Methodology The beam bending part of the lab was set up according to the figure shown in Appendix A, Figure A1. The beam being tested was clamped using C-clamps between the table and another piece of metal used in order to prevent warping from the clamps and simulate that the beam was inserted into a slot in a part or wall. There was a hole in the end of the beam approximately 12.5 inches from the base of the metal piece where a bolt was inserted that was connected to a bucket containing weights which represented the load being applied to the cantilever beam. The dial indicator, which measured the deflection of the beam, was then placed approximately 11.5 inches from the metal piece. For starting the experiment, the individuals would measure the actual distances to the dial indicator and hole with the bolt holding the load. The dial indicator was sitting on an L-bar which was clamped beneath the bar being tested. There was a magnetic switch on the dial indicator instrument that would ensure that the instrument did move over the course of the test. Weights were then added to the bucket at 2.5 lbs. increments but not exceeding 12.5 lbs. and the deflection according to the dial indicator was recorded. This process was repeated for the rest of the remaining cantilever beams needed to be tested. The cantilever beams tested in this experiment were a steel rectangular beam, an aluminum rectangular beam, and an aluminum beam with a box cross-section. 2
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For the PVC welding experiment, the two PVC pieces were arranged and fixed in place according to the set-up in Appendix A, Figure A2. In order to fix the pieces together, PVC filler was used along with a hot air gun which melted the filler into place. During the welding, the filler was pushed toward the gun and moving in the same direction with the hot air gun. The filler was to be held at a 45 degree angle horizontally and vertically to the PVC pieces. The individual would start in the center of the PVC and weld toward the outside of the arrangement. The hot air from the gun melted the filler, thus welding the two pieces together.
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This note was uploaded on 04/20/2008 for the course H 191 taught by Professor Clingan during the Fall '08 term at Ohio State.

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Beam Bending Lab - Material Joining and Beam Bending...

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