EAS 102 Final Project Report-1

EAS 102 Final Project Report-1 - Design Project Final...

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Design Project Final Report The A(ce)-Team Nathan Wood Tom Szucs Chris Morrow Tom Linsenmeyer Joseph Healey April 30, 2009
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Introduction/Executive Summary People been fabricating bridges for thousands of years and in today’s society, there is just as much of a demand as ever. Each bridge is designed and maintained differently; it is designed to meet the specific needs and constraints placed upon it by its designer. This paper will outline the bridge we built from the specifications to the design methods, procedures, problems we faced, analyses, experimentation, and our results. The specifications and constraints put upon us were as follows. We had to build a truss bridge that would span 12 inches, but be no longer than 16 inches, no more than 6 inches tall, and could span no more than 5 inches below the platform. It had to hold at least 160 pounds and it was supposed to be of a minimum weight. The bridge had to allow for a HO-scale-model (1:87 scale) railroad track and train to pass through it, unimpeded. To insure accuracy of the model, all connections had to be pinned, able to move freely when removed, no members could be longer than 4 inches, and the bridge had to be constructed of 80% by mass, pulp and paper products. In order to complete this task, our team used a modified Warren truss design to accommodate the requirements and constraints set before us. This approach was optimal because we could use the strengths of the Warren truss (its reliability, ease of construction, and lightweight properties), but also adapt it to more fully fit our needs. This resulted in a strong lightweight bridge that met the 160-pound load requirement as well as all other requirements. Project Description This project required our group to analyze trusses and develop a bridge that could efficiently carry a load up to one hundred and sixty pounds. The main challenge at hand was to make a light-weight and low-cost bridge that could effectively accommodate an HO-scale railroad track with weight being applied. Originally “low-cost” meant that everything we used in our bridge had to be completely free, but this was quickly changed to having a fifty dollar budget to Ace Hardware due to inevitable costs required
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to build. This fifty dollar budget became extremely useful as we realized that using all paper would most likely not hold the required weight. The longest component of the bridge was only allowed to be a maximum length of four inches. Since the gap that the bridge had to span was twelve inches, this required all of the individual segments to be pinned together in some manner. These Pins were allowed to consist of other things other than paper as long as in the end our bridge was eighty percent pulp or paper materials. The maximum height of the bridge was allowed to be six inches. The ends of the bridge would be supported by platforms that were two inches long and four inches wide. This feat would have been difficult for one person to complete by himself but working in a group of five we managed to complete the task. In addition to truss analysis and experimentation, another facet of the class that we implemented
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This note was uploaded on 11/02/2009 for the course PCE EAS 102 taught by Professor Coffin during the Spring '09 term at Miami University.

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EAS 102 Final Project Report-1 - Design Project Final...

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