Formula's for Stress and Strain Topic

1. Tensile stress (σ) = Resisting force(R)/Cross-sectional Area = Tensile load(P)/A = P/A.
2. Tensile Strain (ε)  =Increase in Length/Orginal Length = dL/L
3. Compressive Stress(σ) = Resisting force(R)/Cross-sectional Area = Push(P)/A = P/A.
4. Compressive Strain (ε)  =Decrease in Length/Orginal Length = dL/L
5. Volumetric stress = Load / Area = Pressure (dp)
6. Volumetric strain (Ev) = Change in Volume / Orginal Volume = dV/V
7. Shear Stress (τ ) = Shear Resistance/Shear Area = R/A
8. Shear Strain (φ) = Transversal Displacement of D to D1 (dl) / Distance between points A and D(h) = dl/h
9. Young's Modulus or MOE (E) = Tensile Stress/ Tensile Strain or Compressive Stress/Compressive Strain = σ /ε
10. Shear Modulus or MOR (C or G or N) = Shear Stress / Shear Strain = τ/φ
11. Relationship between stress and strain(Two Dimension) -  Φ = φ₁ + φ₂
12. Relationship between stress and strain(Two Dimension) -  Φ = φ₁ + φ₂+ φ3
13. Relationship between Bulk Modulus and Young's Modulus - E = 3K(1-2μ )