JUJUMI工程计算器 · Engineering Calculators

Strain & Poisson's Ratio

Compute axial strain from original length and deformation, transverse strain from Poisson's ratio, and the new cross-sectional area.

Inputs

Formula

ε = ΔL/L₀; εt = −ν·ε; A' = A₀ + ΔA
σε_latε_longν = − ε_lat / ε_long
Strain & Poisson's Ratio schematic

How to use

  1. Fill in Orig. length L₀, Deformation ΔL, Poisson ν, Orig. area A₀, Area change ΔA in the Inputs section (watch the unit on each field).
  2. Click Calculate; the tool evaluates the formula shown above.
  3. Read Axial strain ε, Transverse strain εt, New area A' in the results area.
Formula notesPoisson ratio ν = −ε_lateral / ε_longitudinal; axial strain ε = σ/E, lateral contracts by ν.