engineering

Stress Concentration Calculator

Calculate stress concentration factors (Kt) and peak stress for plates with holes, notches, and shaft fillets

Stress Concentration Calculator

Estimate stress concentration factor K_t and peak stress using Peterson's empirical approximations. For precise values, consult published charts or FEA.

Flat plate under tension with a hole of diameter d in a plate of width W.

Use net section stress (F / A_net) as the nominal stress.

Results

Stress Concentration K_t

2.506

Nominal Stress σ_nom

100.00 MPa

Peak Stress σ_max

250.65 MPa

Formula & Notes

σ_max = K_t × σ_nom
σ_max = 2.506 × 100.00 = 250.65 MPa
d/W = 0.2000
Peterson's finite-width correction: Kt ≈ 3 − 3.14(d/W) + 3.667(d/W)² − 1.527(d/W)³

How to Use This Calculator

1

Enter your input values

Fill in all required input fields for the Stress Concentration Calculator. Most fields include unit selectors so you can work in your preferred unit system.

2

Review your inputs

Double-check that all values are correct and that you have selected the right units for each field. Incorrect units are the most common source of calculation errors.

3

Read the results

The Stress Concentration Calculator instantly computes the output and displays results with units. All calculations happen in your browser — no loading time and no data sent to a server.

Formula Reference

Stress Concentration Calculator Formula

See calculator inputs for the governing equation

Variables: All variables and their units are labeled in the calculator interface above.

When to Use This Calculator

  • •Use the Stress Concentration Calculator when solving homework or exam problems that require quick numerical verification of your hand calculations.
  • •Use it during the design phase to rapidly iterate on parameters before running detailed finite element simulations.
  • •Use it when reviewing a colleague's calculation or checking a vendor's data sheet for plausibility.
  • •Use it to generate reference data for a technical report or presentation without manual computation.

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