Chapter 2

Chapter 2 - E n g in e e r in g s tr e s s Tensile stress...

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1 1 Chapter 2 : Elasticity and Viscoelasticity Engineering stress Shear stress, τ : Area, A F s F s τ = F s A o Tensile stress, σ : F original area before loading Area, A F t t σ = F t A o 2 Chapter 2 : Elasticity and Viscoelasticity Shear stress and strain original rectangular shape deformed shape γ x o Δ y o rotated deformed shape shear stress = τ = F/A o F F F F area = A o
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2 3 Chapter 2 : Elasticity and Viscoelasticity Stress components acting on an isotropic volume element τ 31 τ 32 σ 33 τ 21 τ 23 σ 22 τ 13 τ 12 σ 11 Y X Z 4 Chapter 2 : Elasticity and Viscoelasticity Poisson's ratio ε x ε x ε z ε z ε y ε y ! = " # x z = " y z ε x = ε y ε z ν
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3 5 Chapter 2 : Elasticity and Viscoelasticity Mechanical properties - polymers brittle polymer plastic elastomer 6 Chapter 2 : Elasticity and Viscoelasticity
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Chapter 2 - E n g in e e r in g s tr e s s Tensile stress...

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