week 5-1 - b Lecture Today Lab Lecture Today 3:30 to 5:30...

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Unformatted text preview: b Lecture Today Lab Lecture Today 3:30 to 5:30 oom MC204 Room MC204 mperature Effects Temperature Effects n kink of rails Sun kink of rails mperature Effects Temperature Effects T T Δ = α ε Thermal Strain Thermal Elongation TL L e Δ = = α ε pansion hermal f efficien T T ture in tempera change expansion thermal of t coefficien = Δ = T α length L = oefficient of expansion Coefficient of expansion expansion thermal of t coefficien = α Expansion applies to all directions for an isotropic material tal Strains and Elongations Total Strains and Elongations tal strain is a sum of the strain from the Total strain is a sum of the strain from the applied loads and from the temperature changes T Total ε ε ε σ + = Likewise, total elongation includes that from both applied loads and thermal effects TL A FL e Δ + = α EA ample Example Calculate the temperature drop at which the shear stress in the bolt ecomes 70 Pa becomes 70 MPa hermal strain Thermal strain A temperature change results in a change in...
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This note was uploaded on 12/01/2009 for the course CIVE 207 taught by Professor Shao during the Winter '09 term at McGill.

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week 5-1 - b Lecture Today Lab Lecture Today 3:30 to 5:30...

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