It is defined as ratio of the product of modulus of rigidity and polar moment of inertia to the length of the shaft.
Torsional Rigidity is caluclated as: Torsional Rigidity= C J/l
The torsional rigidity comes from the torso. The lateral rigidity would come from the arms and the legs becoming stiff.
Torsional analysis: This analysis completed based on strcture properties like Mass MI and Torsional stiffness. Torsional critical speed analysis: Speed of rotor will come into picture in addition to Mass MI and Torsional stiffness of the structure.
No, a torsional pendulum works with the restoring force provided by the elasticity of the support rod, or (in clocks and watches) by the spring on the balance-wheel.
brass
when the friction plate is pressed by the pressure plate a torsional vibration is developed in order to dampen this vibration torsional springs are provided in the spring plate this springs are also called damper spring.
It is defined as ratio of the product of modulus of rigidity and polar moment of inertia to the length of the shaft. Torsional Rigidity is caluclated as: Torsional Rigidity= C J/l
inversly proportioal to cube of diameter
The torsional rigidity comes from the torso. The lateral rigidity would come from the arms and the legs becoming stiff.
Force exerted from a rope tide around the catapult shaft
One pascal is 1newton/meter^2. Therefore one megapascal is 10^6 newton/meter^2. Megapascal is a unit of Pressure (to be precise, stress) . So we cannot convert between Newton meter per degree and Megapascal as units of torsional rigidity.
Torsional analysis: This analysis completed based on strcture properties like Mass MI and Torsional stiffness. Torsional critical speed analysis: Speed of rotor will come into picture in addition to Mass MI and Torsional stiffness of the structure.
Torsion = turning Oscillation = repeated motion toraion oscillation is repeated turing back and forth. Imagine you have a weight hanging on the end of a piece of string. Twist the weight and, when released, it will oscillate torsionally.
1. This is due to the stress concentration at the corners of the key way and reduction in the cross-sectional area of the shaft. It, other words the torsional strength of the shaft is reduced. 2. In case the key way is too long and the key is of sliding type, then the angle of twist increased. So it is actually assumed that the strength of the keyed shaft is 75% of the solid shaft.
ANY MACHINED BAR CAN BE CALLED AS ROD, IT TRANSFERRS MOTION FROM ONE LINK TO ANOTHER..................IF THE SUPPLIED MOTION IS OF TORSIONAL TYPE(WHICH TENDS TO ROTATE THE LINK ON ITS OWN AXIS) THE SAME ROD IS CALLED A SHAFT... RANA PRAKASH ranaprakash2873@gmail.com
The term torsional critical speed of centrifugal pumps and associated drive equipment refers to the speed of a pump rotor or related rotating system that corresponds to a resonant frequency of torsional vibration of the rotating system. Torsional critical speeds are associated with torsional or angular deflection of the rotor and are not to be confused with lateral critical speeds associated with lateral deflection. The two are separate entities. A given rotor or rotating system may possess more than one torsional resonant frequency or torsional critical speed. The lowest frequency which produces the "first mode shape" and "first torsional critical speed" is in general of the most concern. Torsional vibration is caused by torsional excitation from sources such as variable frequency drive motor toque pulsations, combustion engine torque spikes and impeller vane pass pulsation. The calculation of the first torsional critical speed is fairly simple for simple rotor systems.
a colloquialism
The torsional stress refers to the stress that arises from the deformation set up by a twisting moment or torque.