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In physics and materials science, plasticity (also known as plastic deformation) is the ability of a solid material to undergo permanent deformation, ...
Plasticity (physics), in engineering and physics, the propensity of a solid material to undergo permanent deformation under load; Behavioral plasticity, change in an organism's behavior in response to exposure to stimuli; Neuroplasticity, in neuroscience, how entire brain structures, and the brain itself, can change as a result of experience
This permits definition of physical properties at any point in the continuum, according to mathematically convenient continuous functions. The theories of elasticity , plasticity and fluid mechanics are based on the concepts of continuum mechanics.
Plastic deformation of a thin metal sheet. Flow plasticity is a solid mechanics theory that is used to describe the plastic behavior of materials. [1] Flow plasticity theories are characterized by the assumption that a flow rule exists that can be used to determine the amount of plastic deformation in the material.
However, the benefit of this effect is that it can be used to measure the effects of strain gradients on plasticity. Several new plasticity models have been developed using data from indentation size effect studies, [ 4 ] which can be applied to high strain gradient situations such as thin films.
Greenwood and Williamson [31] defined a dimensionless parameter called the plasticity index that could be used to determine whether contact would be elastic or plastic. The Greenwood-Williamson model requires knowledge of two statistically dependent quantities; the standard deviation of the surface roughness and the curvature of the asperity peaks.
The label "best if used by" specifies a date when the product might lose quality but doesn't mean it isn't safe to eat. This is especially true for items that do not deteriorate on store shelves ...
For some materials, e.g. elastomers and polymers, subjected to large deformations, the engineering definition of strain is not applicable, e.g. typical engineering strains greater than 1%, [1] thus other more complex definitions of strain are required, such as stretch, logarithmic strain, Green strain, and Almansi strain.