Assignment 2_Fall 2011

Assignment 2_Fall 2011 - Ryerson University Department of...

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Materials Selection for Engineering Design MTL 700 Assignment #2 Session: Fall 2011 October 31, 2011 Due on Tuesday November 7, 2011 Exercise E1. In vehicle suspension design it is desirable to minimize the mass of all components. You have been asked to select a material and dimensions for a light spring to replace the steel leaf-spring of an existing truck suspension (Figure 1). The existing leaf-spring is a beam, shown schematically in the figure. The new spring must have the same length L and stiffness S as the existing one, and must deflect through a maximum safe displacement δ max without failure. The width b and thickness t are free variables. Figure 1 Derive a material index for the selection of a material for this application. Note that this is a problem with two free variables: b and t ; and there are two constraints, one on safe deflection δ max and the other on stiffness S . Use the two constraints to fix free variables. The table catalogs the requirements.
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This note was uploaded on 01/18/2012 for the course MECH MTL 700 taught by Professor Habiba during the Fall '11 term at Ryerson.

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Assignment 2_Fall 2011 - Ryerson University Department of...

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