Geometric Shape Selector
Shape Type
Hole Parameters
Results

1.00

0.00

0.20

Loading Conditions
Loading Type
Load Parameters
Cyclic Loading (for Fatigue)
Material Properties
Material Database
Fatigue Properties
Material S-N Curve
Advanced Settings
Calculation Method
Additional Factors
SCF vs Geometry Ratio

Interactive Guide

Learn how to use the Stress Concentration Factor Tool effectively

Geometry Selection

Choose from various geometric features like holes, notches, fillets, grooves, and keyways that cause stress concentration.

Loading Conditions

Select the type of loading (tensile, bending, shear, torsion) and input the load magnitude for accurate SCF calculation.

Material Properties

Choose from built-in material database or input custom material properties for precise fatigue life estimation.

Frequently Asked Questions

The stress concentration factor (Kt) is a dimensionless factor that quantifies how much the stress in a material is amplified at a geometric discontinuity compared to the nominal stress in the material. It's defined as the ratio of the maximum stress at the discontinuity to the nominal stress in the section.

Notch sensitivity accounts for the material's response to stress concentrations. Brittle materials are more notch-sensitive than ductile materials. The tool applies notch sensitivity to adjust the theoretical stress concentration factor (Kt) to a more realistic fatigue stress concentration factor (Kf).

The tool primarily uses Peterson's Stress Concentration Factors charts (Peterson, R.E., "Stress Concentration Factors", Wiley, 1974) for theoretical Kt values. For fatigue calculations, it implements modified Goodman and Miner's rule approaches based on standard mechanical engineering references.