Stress S is proportional to length change dL divided by length L {Hooke's law} {Hooke law}: S = k * (dL / L). Pressure compresses material against restoring force. Restoring force F varies with material type k and distance compressed x: F = -k * x. Pressure is compression force F divided by area A: P = F/A. Pressure equals restoring force -k*x divided by area A: P = F/A = -k * x / A. Constant k depends on Young's or other elasticity modulus u, cross-sectional area A, and object length L: k = A * u / L.
Physical Sciences>Physics>Dynamics>Pressure>Stress
5-Physics-Dynamics-Pressure-Stress
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Date Modified: 2022.0224