Mohr–Coulomb · Soil Strength
unseel.com · failure envelope · cohesion · friction angle
σ′ confining 0 kPa
Circle τ_max 0 kPa
State
Failure envelope τ = c′ + σ′ tan φ′
Mohr circle of stress
Tangent · failure point
σ′ and τ axes
Unseel.com · Mohr–Coulomb Soil