Plasticity (physics)
Plasticity, or plastic deformation, is the ability of a solid material to have a permanent change in shape. In physics and materials science, this is called deformation.[1][2]
For example, a solid piece of metal being bent or pounded into a new shape shows plasticity. Permanent changes occur in the material itself. In engineering, the transition from elastic behaviour to plastic behaviour is known as yielding.
Plasticity (physics) Media
Plasticity under a spherical nanoindenter in (111) copper. All particles in ideal lattice positions are omitted and the color code refers to the von Mises stress field.
The three characteristic regions of the critical resolved shear stress as a function of temperature
The three stages of time-independent plastic deformation of single crystals
An idealized uniaxial stress-strain curve showing elastic and plastic deformation regimes for the deformation theory of plasticity
Comparison of Tresca criterion to Von Mises criterion
The von Mises yield surfaces in principal stress coordinates circumscribes a cylinder around the hydrostatic axis. Also shown is Tresca's hexagonal yield surface.
References
- ↑ Lubliner, J. (2008). Plasticity theory. Dover. ISBN 978-0-486-46290-5.
- ↑ Bigoni, D. (2012). Nonlinear Solid Mechanics: Bifurcation Theory and Material Instability. Cambridge University Press. ISBN 978-1-107-02541-7.
