Design Contents |

Preliminary Matters

Design Methodology

..brain storming

..evaluation matrix

..QFD

Statistical Considerations

..variability in materials

..variability in dimensions

..variability in loading

..preferred sizes

Tolerances

Design Factor

Introduction to Failure

Failure Theories

Application of von Mises

..criterion in 2 D

Stress Concentration

..and notch sensitivity

Failure Under Combined Loading

..combined bending and torsion

Failure Under Cyclic Loading

..fatigue

..fracture mechanics

Instability - Buckling

Concentrically Loaded Strut

..slender columns

..Euler formula

..effective length

..short and intermediate columns

Eccentrically Loaded Strut

.. theory

Shock Loading

..deflection

..stress

Evaluation of Geometric Stress Concentration Factor
Using JavaScript or a Java Applet Plate Subject to Tension With Hole in Centre |

This applet determines the theoretical stress concentration factor for a rectangular plate subject to tension (in a horizontal direction in the applet below) with a central hole. The ratio of the hole diameter / plate width should not exceed 0.5.

Enter the plate width and hole radius in mm and click on the 'Calculate' button.

This stress concentration factor is for use with the average stress calculated on the net reduced cross section area, ie:

These calculations are based on information contained in "Roark's Formulas for Stress and Strain", 6th Ed. McGraw Hill, 1989 and also "Stress Concentration Factors", by R E Peterson, John Wiley and Sons, 1974. Both these publications contain information relating to a large number of configurations.

David Grieve, Revised: 30th July 2017, 28th January 2010; 3 March 2003; Original: 24th August 2000.

**Contact the Author:**

Please contact me for comments and / or corrections or to purchase the book, at: davejgrieve@aol.com