Stress Concentration Calculator v1

Subject

A stress concentration factor is an intensification multiplier by which stress rises due to a discontinuity, which may be a notch, hole, groove or a change in material. The multiplier is influenced by two principle factors; the size of the discontinuity and radius at its root.

Stress concentration factors are applied to otherwise evenly distributed stresses that would normally be seen in plain shapes of the same cross-sectional with smooth and continuous edges that are exposed to axial, bending and/or shear forces.

All you need to do is multiply your calculated stress by the concentration factor to identify its magnification at the root of the discontinuity.

Stress concentrations are extremely important in defining the size and shape of any reinforcement you may need to incorporate into structural recesses and/or joints.

The stress concentration calculator includes 12 calculation options covering various notches, holes and grooves in bars, plates and tubes.

Stress Concentration generates factors that should be applied to particular stresses; bending, axial torsional.

All you need to do is multiply your calculated stress by the factor(s) produced to identify the maximum intensification around a stress raiser such as a notch, groove or hole. The factors generated in this calculator can be applied to the stresses identified in any section or shape irrespective of complexity.

For help using this calculator see Technical Help

Stress Concentration Factor Calculator - Options

Stress Concentration includes the following calculation options:

FLAT – One U-Notch

Calculates the maximum stress concentration factor for a flat bar with parallel sides and a U-shaped notch in one edge normal to the axis of the bar.

You enter:	and the stress concentration calculator will provide:
Bar depth Notch root radius Notch depth	Axial In-plane bending Out-of-plane bending

FLAT – Two U-Notches

Calculates the maximum stress concentration factor for a flat bar with parallel sides and two equal U-shaped notches in opposite edges normal to the axis of the bar.

You enter:	and the stress concentration calculator will provide:
Bar depth Notch root radius Notch depth	Axial In-plane bending Out-of-plane bending

FLAT – One V-Notch

Calculates the maximum stress concentration factor for a flat bar with parallel sides and a V-shaped notch in one edge normal to the axis of the bar.

You enter:	and the stress concentration calculator will provide:
Bar depth Notch root radius Notch depth V-angle	Axial In-plane bending Out-of-plane bending

FLAT – Two V-Notches

Calculates the maximum stress concentration factor for a flat bar with parallel sides and two equal V-shaped notches in opposite edges normal to the axis of the bar.

You enter:	and the stress concentration calculator will provide:
Bar depth Notch root radius Notch depth V-angle	Axial In-plane bending Out-of-plane bending

FLAT – Fillet

Calculates the maximum stress concentration factor for a flat bar with parallel sides and both sides equally recessed (filleted) on opposite sides.

You enter:	and the stress concentration calculator will provide:
Bar depth Fillet root radius Fillet depth	Axial In-plane bending Out-of-plane bending

FLAT – Hole

Calculates the maximum stress concentration factor for a flat bar with parallel sides and a through hole between one edge and the centreline of the bar.

You enter:	and the stress concentration calculator will provide:
Bar depth Hole radius Hole centre to edge Bar thickness	Axial In-plane bending Out-of-plane bending Cylindrical bending

FLAT – Reinforced Hole

Calculates the maximum stress concentration factor for a flat bar with parallel sides and a reinforced through hole on its centreline. This calculation option only provides a result for an applied tensile load. See the Technical Help page for suitable bending stress concentration calculation methods.

You enter:	and the stress concentration calculator will provide:
Reinforcement depth Root radius Bar thickness Hole diameter Reinforcement diameter	Axial

PLATE – Hole

Calculates the maximum stress concentration factor for a flat bar with parallel sides and a through hole between one edge and the centreline of the bar.

You enter:	and the stress concentration calculator will provide:
Plate thickness Hole radius Notch depth	In-plane tension (+ve & +ve) In-plane tension (+ve) In-plane tension (+ve & -ve) Out-of-plane bending Tubular bending Membrane bending

Round – U-Groove

Calculates the maximum stress concentration factor for a round bar with parallel sides and a U-shaped groove turned into its surface anywhere along its length.

You enter:	and the stress concentration calculator will provide:
Bar diameter Groove root radius Groove depth	Axial In-plane bending Out-of-plane bending (torsion)

Round – V-Groove

Calculates the maximum stress concentration factor for a round bar with parallel sides and a V-shaped groove turned into its surface anywhere along its length.

You enter:	and the stress concentration calculator will provide:
Bar diameter Groove root radius Groove depth	Axial In-plane bending Torsion

Round – Fillet

Calculates the maximum stress concentration factor for a round bar with parallel sides turned down to a smaller diameter for part of its length.

You enter:	and the stress concentration calculator will provide:
Bar diameter Groove root radius Groove depth Groove angle	Axial In-plane bending Torsion

Tube – Hole

Calculates the maximum stress concentration factor for a tubular bar with parallel sides and a hole drilled through both opposite walls on its centreline.

You enter:	and the stress concentration calculator will provide:
Outside diameter Inside diameter Hole diameter	Axial In-plane bending Torsion

Check minimum system requirements