Brakes & Clutches

Band, drum, disc, caliper, cone and multi-plate brakes / clutches, plus thermal analysis (teaching model).

Input Parameters

Brake / clutch type

Friction coefficient μ

—

Speed n

rpm

Required torque T_req (optional)

N·mm

Drum radius r

Wrap angle θ

Rotation sense

Applied force F

Drum radius r

Wrap angle θ

Shoe arrangement

Applied force F (per shoe)

Outer radius Rₒ

Inner radius Rᵢ

Axial force W

Friction surfaces Z

—

Pressure model

Allowable pressure p_allow

MPa

p·v duty limit

MPa·m/s

Outer radius Rₒ

Inner radius Rᵢ

Line pressure p

MPa

Piston area A (each)

mm²

Pistons n

—

Sides (friction interfaces)

Allowable pressure p_allow

MPa

p·v duty limit

MPa·m/s

Mean radius Rₘ

Cone half-angle α

Axial force Wₐₓ

Outer radius Rₒ

Inner radius Rᵢ

Clamp force W

Friction plates

—

Pressure model

Allowable pressure p_allow

MPa

p·v duty limit

MPa·m/s

Results

Thermal analysis

Energy per stop, duty power and temperature rise (lumped-mass model).

Equivalent mass m

Initial speed v₀

m/s

Stop time t_b

Stops per hour N

—

Rotor thermal mass

Specific heat c

J/kg·K

Cooling coeff α

W/K

Fade temp

°C

Effective wheel radius Rₑ

Specific wear coef k (mm³/J)

mm³/J

Allowable lining wear

Input Parameters

Results

Thermal analysis

Schematic