Java spring calculation and plotting programme

This program can be used in two ways:

1. To calculate the stresses in a spring which has been specified by entries in the in the top 8 boxes on the left, in the units indicated. After entering the values click on the 'Calculate' button.

2. To calculate the stiffness of an existing spring. Enter values only for the, shear modulus, coil and wire mean diameters and (in the top right box) the number of active turns, then click on the 'Calculate stiffness' button. The result appears in the 'Calculated rate' box.

David Grieve. Revised: 25th February 2010. Original: 17th September 1999.