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Unformatted text preview: Pounds A = Area Square inches Strain = total change in dimension divided by the original dimension ε = δ/L Where: ε = Strain in/in δ = Deflection (Change in length) inches L = Original length inches Modulus of Elasticity = the ratio where strain is proportional to stress E = s/ ε Where: E = Modulus of Elasticity PSI s = Stress/Strength PSI ε = Strain in/in Mike’s special equation: ε = s / E = δ / L 1. Circle the unknown (What are you solving for?) 2. Underline the knowns (What values can you extract from the problem statement?) 3. Use only two expressions (ex: ε = s/E, ε = δ/L, or s/E = δ/L) Safety Factor = failure stress divided by the allowable stress S.F. = s failure /s allowed Where: s failure = Stress that will cause failure PSI s allowed = Stress allowed in application PSI...
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 Spring '10
 Tomlinson
 Multiplication, Imperial units, Tensile strength, Inch, Carbon nanotube, application PSI PSI

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