What is the torsional stiffness equation?

where I p = π D 4/32 is the polar moment of inertia of a circular cross section. Thus, the torque required for unit twist, i.e., T (θ) is called the torsional stiffness. The quantity is known as torsional rigidity and is represented …

Why is torsional stiffness important?

Torsion stiffness is a very important characteristic in chassis design. A stiff chassis has more “cornering” torque and the suspension can handle it more easily. The loads are applied at the front suspension mounting points, while the displacements are fixed at the rear suspension.

What is torsional stiffness measured in?

Torsional stiffness may be expressed in several different units, but the most common and easiest to work with is Nm/rad. Often described as torque per unit deflection, torsional stiffness is significant in positional systems and describes a coupling’s resistance to torsional deflection.

How do you add torsional stiffness?

Increasing a structure’s torsional stiffness will usually involve increasing a quality known as its polar moment of inertia or J. The polar moment of inertia (J) is often thought of as a measure of a structure’s or object’s resistance to twisting.

What is torsional section modulus?

Polar modulus is defined as the ratio of the polar moment of inertia to the radius of the shaft. It is also called as torsional section modulus. It is denoted by Z p.

How do you increase torsional stiffness?

What is torsional stiffness of the rod?

Torque per radian twist is known as torsional stiffness (k) k = M t ϕ = G J L. Additional Information. The parameter GJ is called torsional rigidity of the shaft. Torsional rigidity is also defined as torque per unit angular twist per unit length.

How do you increase torsional stiffness of a chassis?

The torsional rigidity of a spaceframe can be increased by placing more frame members strategically. Nevertheless, the weight of the spaceframe chassis is increased as additional frame members are installed. Race care designers must optimize those two parameters to yield the optimum performance of their race car.