Since the applied torsion is proportional to the membrane volume, the more elongated of two rectangular bars of equal area has the smaller torsional rigidity. Torsion bar, this is in fact a tube or bar and acts as a spring, it replaces the conventional coil spring. In most cases is it wise to design for a torsion spring to wind in the direction of the coil winding. You could also use a factory torsion bar, and by doing some simple experimentation determine the linear rate, then model around it. The spring will also grow in length. This calculation works with solid or tubular torsion bars. Just looking at the torsion bars is only part of the equation.

The Speed-Wiz Torsion Bar Calculation computes the stiffness of torsion bars. Tubular bar dimensions can be specified by outside diameter and wall thickness or by outside diameter and inside diameter. Torsion bars are made of metal (generally some form of steel) with shorts splined ends to connect to the rocker on one end, and chassis on other. Sway Bar Rate Calculator Trying to get a rough idea of the spring rate of your sway bar? For more information on the math and our universal torsion bar calculator, check out our torsion bar wheel rate calculator. Definition of Torsion Spring Calculations: The process of calculating several torsion spring dimensions such as the computing of shear modulus of a spring wire, youngs modulus of spring wire, poission's ratio for spring wire along with a springs wire diameter, outer diameter and number of active coils to obtain a torsion spring calculation. Just bolt the torsion bar down at one end to a workbench, and measure the deflection when it is loaded with a known amount of … Sway Bar Rate calculator copyright 2010 Length of bar (in) Bar out sidediameter (in) Bar inside diameter (in) Note: use 0 if solid bar Length of arm (in) lbs if rate is not updated : click update button below Home : more calculators

Furthermore, the calculator will notify you of your springs inner diameter after deflection (travel) so that you may resolve which would be the correct shaft or arbor size to install in your springs inner diameter so the torsion spring can function safely over the mandrel without binding on the shaft or arbor. Torsion bar; Torsion Bar Calculation. Torsion Spring Constant Design Considerations: As load is applied to a torsion spring, the springs diameter will decrease, reducing the outside and inside diameters. It will calculate the spring rate for solid and hallow sway bars. This simple calculator will help do that for SOLID and HOLLOW sway bars. Torsion bar is now in use in all Formula 1 cars. Calculator for round solid torsion bars : Bar outer diameter D 10-3 m: Bar Length L 10-3 m: Shear modulus G = E / ( 2 ( 1+v ) ) 10 9 Pa: Torque T Also, it is obvious that bending a long thin rectangular section will not appreciably change the membrane volume and, thus, the torsional rigidity of a bar … The original formula is from Fred Puhn's book on handling called "How to make your car handle". For example, I do not know the numbers but if the front sway bar is half the fronts cornering rate and the rear sway bar is 50% of the rears, doubling the torsion bar rates equally front and rear will change the effective wheel rate balance when cornering. Torsion Spring Constant Calculator.