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Unformatted text preview: Deforms workpiece Stress and strain http://www.mse.cornell.edu/courses/engri111/modulus.htm stress strain Elastic modulus Vice fixture – machine a pocket N w o w 1 Frictional force F=Nµ W 1 = W o + W o (N/AE) A Stress = σ = N/A Friction coefficients http://www.roymech.co.uk/Useful_Tables/Tribology/co_of_frict.htm material1 material2 static dynamic Aluminum Aluminum 1.051.35 1.4 Aluminum mild steel 0.61 0.47 Cantilever Beam deflection Deflection y max = FL 3 /(3EI) http://physics.uwstout.edu/statstr/Statics/Beams/bdsnp412b.htm Area moment of inertia (I) Rectangle I=(1/12) bh 3 Circle I=πr 4 /4 http://www.roymech.co.uk/Useful_Tables/Form/M_of_Inertia_2.html Elastic modulus steel Elastic modulus aluminum E=30,000,000 psi E=10,000,000 psi F F b h r L Final diameter at far end D e = 2(r doc + y max ) = 2(r  doc + 4FL 3 /(3E π r 4 ) Walker Magnetics, Worcester, MA http://www.walkermagnet.com/mag/index.html Magnetic chucks...
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 Winter '08
 Brown
 Force, Friction, elastic modulus, fixturing, Elastic modulus aluminum

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