Physical object which does not deform when forces or moments are exerted on it
The position of a rigid body is determined by the position of its center of mass and by its attitude (at least six parameters in total).[1]
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In physics, a rigid body, also known as a rigid object,[2] is a solid body in which deformation is zero or negligible. The distance between any two given points on a rigid body remains constant in time regardless of external forces or moments exerted on it. A rigid body is usually considered as a continuous distribution of mass.
In the study of special relativity, a perfectly rigid body does not exist; and objects can only be assumed to be rigid if they are not moving near the speed of light. In quantum mechanics, a rigid body is usually thought of as a collection of point masses. For instance, molecules (consisting of the point masses: electrons and nuclei) are often seen as rigid bodies (see classification of molecules as rigid rotors).
^Lorenzo Sciavicco, Bruno Siciliano (2000). "§2.4.2 Roll-pitch-yaw angles". Modelling and control of robot manipulators (2nd ed.). Springer. p. 32. ISBN 1-85233-221-2.
^Andy Ruina and Rudra Pratap (2015). Introduction to Statics and Dynamics. Oxford University Press. (link: [1])
In physics, a rigidbody, also known as a rigid object, is a solid body in which deformation is zero or negligible. The distance between any two given...
dynamics, rigid-body dynamics studies the movement of systems of interconnected bodies under the action of external forces. The assumption that the bodies are...
origin. [citation needed] Spin angular velocity refers to how fast a rigidbody rotates with respect to its center of rotation and is independent of the...
be assumed to exist at one point), or a non-rotating rigidbody depends on the mass of the body as well as its speed. The kinetic energy is equal to 1/2...
body of interest and the external forces acting on it. The body: This is usually a schematic depending on the body—particle/extended, rigid/non-rigid—and...
In rotordynamics, the rigid rotor is a mechanical model of rotating systems. An arbitrary rigid rotor is a 3-dimensional rigid object, such as a top. To...
of motion. In the case of a single rigidbody, the center of mass is fixed in relation to the body, and if the body has uniform density, it will be located...
through elastic body deformation. It gains some or all of its motion from the relative flexibility of its members rather than from rigid-body joints alone...
are two important special cases, however: If the fluid rotates like a rigidbody – that is, if the angular rotational velocity Ω is uniform, so that u...
velocity vectors v ( t ) {\displaystyle \mathbf {v} (t)} of a point on a rigidbody rotating around the origin: v = Ω r . {\displaystyle \mathbf {v} =\Omega...
freedom system experiences both rigid-body translation and/or rotation and vibration. The existence of a rigid-body mode results in a zero natural frequency...
formulated to analyze systems of rigidbodies, but they have also been developed for the study of the mechanics of deformable bodies. The principle of virtual...
kinetic phenomenon of classical mechanics which describes the movement of a rigidbody with three distinct principal moments of inertia. It has also dubbed the...
In any case, the analysis of the rigidbody motion begins with the point force model. And when a force acting on a body is shown graphically, the oriented...
in a more or less ad hoc method to obtain the best fit to data. Simple rigidbody dynamics do not give the best theory; one has to account for deformations...
sum of the angular momenta of its constituent parts. For a continuous rigidbody or a fluid, the total angular momentum is the volume integral of angular...
rubber manufacturing, painting. The simplest case of rolling is that of a rigidbody rolling without slipping along a flat surface with its axis parallel to...
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