Day 1 - Mach. Ele, Stresses, Strain, Poisson

Machine Elements: Cylinders in Opposite: Tangential Speed

Machine Elements: Cylinders in Opposite: Relation of Diameter and Speed

Machine Elements: Cylinders in Opposite: Speed Ratio

N1/N2

Machine Elements: Cylinders in Opposite: Center Distance

Machine Elements: Cylinders in Same: Tangential Speed, Relation, Speed Ratio

Machine Elements: Cylinders in Same: Center Distance

Stresses: Design Stress

Stresses: Tensile Stress

Stresses: Tensile Stress: Area for circular, hollow, and rectangular

Stresses: Compressive Stress

Stresses: Shearing Stress

n_s = # shear

n_r = # rivet

A_s = shearing area

Stresses: Max Shear (Tresca’s) : Shearing Yield Stress

Stresses: Max Shear (Tresca’s) : Factor of Safety

Stresses: Shearing due to punching of circular and square hole

Stresses: Pressure needed to punch a hole: steel

Stresses: Pressure needed to punch a hole: brass

Fp = 65 d t

Stresses: Pressure needed to punch a hole if not circular

Fp = 1/3 (P_hole) k t

k = material factor

P_hole = hole perimeter

Stresses: Pressure needed to punch a hole if not circular: k for steel and brass

k_steel = 80 tons/in²

k_brass = 65 tons/in²

Stresses: Pressure needed to punch a hole if not circular: Perimeter for Square

P_hole = square = 4 S

Stresses: Bearing Stress

Stresses: FS based on yield and ultimate

Stresses: Torsional Shear Stress for solid

Stresses: Torsional Shear Stress: Polar moment of Inertia for solid

Stresses: Torsional Shear Stress: For hollow

Stresses: Torsional Shear Stress: Polar Moment for hollow

Stresses: Bending Stress: For rectangular

Stresses: Bending Stress: For circular

Strain:

Strain: Deflection

Strain: Young’s Modulus

Strain: Thermal Elongation: deflection

Strain: Thermal Elongation: Stress

Strain: Thermal Elongation: k for steel in SI and english

Strain: Thermal Elongation: Young’s Modulus for steel

Relation between shearing and tensile stress based on theory of failure

Variable Stress: Soderberg

Variable Stress: Mean Stress

Variable Stress: Variable Component Stress

Variable Stress: Max Stress

Smax = Sd + Smin

Variable Stress: Dynamic Stress and Alternating

½ Sd = Sa

Variable Stress: Static Stress

S_static = Smin

Variable Stress: Goodman

Poisson Ratio

Poisson Ratio: Longitudinal Strain

Poisson Ratio: Lateral Strain

Poisson Ratio: Strain

Poisson Ratio: For Steel

u = 0.3