MT-1620 al.2002 et's first review a bit from Unified, saw that there are 3 basic considerations in elasticity Equilibrium 2. Strain-Displacement 3. Stress-Strain Relations Constitutive Relations) Consider each 1. Equilibrium (3) ΣF=0,ΣM=0 Free body diagrams Applying these to an infinitesimal eleme yields 3 equilibrium equations Figure 4.1 Representation of general infinitesimal element dy z Paul A Lagace @2001 Unit 4-p. 2MIT - 16.20 Fall, 2002 Let’s first review a bit … from Unified, saw that there are 3 basic considerations in elasticity: 1. Equilibrium 2. Strain - Displacement 3. Stress - Strain Relations (Constitutive Relations) Consider each: 1. Equilibrium (3) • Σ Fi = 0, Σ Mi = 0 • Free body diagrams • Applying these to an infinitesimal element yields 3 equilibrium equations Figure 4.1 Representation of general infinitesimal element Paul A. Lagace © 2001 Unit 4 - p. 2