Axial Strain Calculator: worked example
This example is generated from PROFENG's own default input set and the implemented relationship. It is not copied from a cited publication.
Relationship
ε = ΔL/L
This calculator determines strain from change in length, original length. Use it for first-pass mechanics and machine-design calculations with explicit loads, geometry and material inputs.
Inputs
- Change in length (delta) = 1 mm
- Original length (length) = 1,000 mm
Working
(1)/(1000) = 0.001
Strain: 0.001
Assumptions and limits
- Loads and geometry are represented by the idealized relationship shown.
- Material behavior is treated according to the simple formula, typically linear-elastic where relevant.
- Units and section properties are consistent with the displayed equation.
- Change in length and original length are measured along the same axis and use compatible units.
- This is engineering strain; large-deformation true strain is a different measure.
Formula source and acknowledgement
Ferdinand P. Beer, E. Russell Johnston, John T. DeWolf, David F. Mazurek, Mechanics of Materials, 8th, 2020, McGraw Hill. Credit belongs to the cited author(s)/publisher; PROFENG presents its own implementation and does not imply endorsement.
Automated verification passed – 30 September 2026 – six numerical cases checked, with dimensional checks and an independent implementation where applicable.
This worked example is for engineering screening and education. Replace defaults with traceable project data and confirm the method, assumptions, standards and equipment information before design, procurement or operation.