T01.2 EGR75L Overview

T01.2 EGR75L Overview - Topics Free body diagrams(FBDs...

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9/1/2010 1 Overview of EGR 75L T01.2 • Free body diagrams (FBDs) – Trusses, Frames, … – Internal forces: P, V, M, T • Stresses ( σ , τ ) due to internal forces σ τ • Pressure vessels • Stress concentrations • Failure planes • Deformations • Buckling Topics What’s different between the wooden elements of these two tensegrity systems? “truss” “frame” Frames ht p:/ www.diging.com ht p:/ www.spectrum.ieee.org/print/7193 htp:/www.bodyworlds.com Pressure Vessels Todd Gustafson htp:/www.flickr.com/photos/valerias/ Stress Concentrations De Havil and Comet
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9/1/2010 2 Energy Σ ij Stress ij *Strain ij = energy density •S to re • Dissipate • Release www.jdpower.com What loading caused these fractures? spiral fracture transverse fracture Lynda Redwood In what plane will each of these materials fail? Aluminum Aluminum Cast iron Cast iron Foam Rubber bal oon Experimental Failure Planes
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This note was uploaded on 12/19/2010 for the course EGR 75 taught by Professor Virgin during the Fall '08 term at Duke.

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T01.2 EGR75L Overview - Topics Free body diagrams(FBDs...

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