MSL_LAB4 Beam Bending - MANE-4040 MECHANICAL SYSTEMNS...

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Unformatted text preview: MANE-4040 MECHANICAL SYSTEMNS LABORATORY (MSL) Lab Report Cover Sheet Title of Lab: _Beam Bending and Analysis__ ________________ Section Tu, W(am), W(pm), Th : _4 ________________________________________ Group ID (A, B, C, D, E ): _E ________________________________________ Submitted by Group Leader: _Adam Larouche ____________________________ Group Member: 1 _Dan Garr ________________________________ Group Member: 2 _Carl Hansen _____________________________ Group Member: 3 _Sam Harrington __________________________ Group Member: 4 _Adam Larouche __________________________ Group Member: 5 _Matt Wilcox _____________________________ Lab Scheduled Date: _2/28/2008 _________________________________ Lab Report Due Date: _3/27/2008 __________________________________ Lab report Received Date (by TA): __________________________________________ Late Penalty Points (by TA): __________________________________________ Section Possible Points Points Given Abstract 10 Introduction 10 Experimental Procedures 15 Results 25 Discussion of Results 25 Conclusions 15 Total 100 I: Abstract This report is about engineering testing procedures for steady stress beam loading. The Instron testing machine will be used to put loads on polycarbonate and aluminum beams, with specific cross-sections and unsupported distances. LABView software will then collect and later analyze the data in this report. With this data, maximum displacement values will be determined, and a detailed discussion and comparison of these values is included. This data will also allow a calculation of the maximum moment in a given beam, radius of curvature the beam, and minimum yield strength for the beam deflections to remain elastic. Beam2D software was used to analyze virtual versions of the beam in order to compare the computer and real world testing, and print screens from this software package are included in this report. II: Introduction: The premise of this lab is to explore and analyze the concepts of beam bending. Three point bend testing was performed on two samples, one polycarbonate and the other an aluminum alloy. The maximum central deflection of each rectangular beam was measured under specified loading situations. The tests were carried out using an Instron machine and an extensometer. Data in the form of stress, cross head displacement and strain were all recorded using LABView and exported to Excel and Beam2D for analysis. Figure II-1: Beam Bending Apparatus The beams are roughly .25” by .5” by 7.25”. A total of six different tests were completed on the samples, which include: Test Number Material Orientation Separation Max Load. Lbs. 1 Polycarbonate .5 in. height 4 in. 10 2 Polycarbonate .25 in. height 4 in. 10 3 Aluminum Alloy .25 in. height 4 in. 10 4 Aluminum Alloy .25 in. height 4 in. 80 5 Aluminum Alloy .25 in. height 6 in. 80 6 Aluminum Alloy .5 in. height 6 in. 80 Chart II-1: Test Information The first part of the lab was to complete the above tests and compare the actual deflection values obtained...
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MSL_LAB4 Beam Bending - MANE-4040 MECHANICAL SYSTEMNS...

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