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Robert King Merton was an American sociologist who argued that the social structure of a society can encourage deviance to a large degree. Merton's theory borrows from Èmile Durkheim's theory of anomie, which argues that industrialization would fundamentally alter the function of society; ultimately, causing a breakdown of social ties, social norms, and the social order.
Strain theory is a theoretical perspective that identifies anomie (i.e. normlessness) as the result of a society that provides little moral guidance to individuals. [ 1 ] : 134 Emile Durkheim (1893) first described anomie as one of the results of an inequitable division of labour within a society, observing that social periods of disruption ...
Agnew recognized that strain theory, originally put forward by Robert King Merton, was limited in terms of fully conceptualizing the range of possible sources of strain in society, especially among youth. According to Merton, innovation occurs when society emphasizes socially desirable and approved goals but at the same time provides inadequate ...
The concept of strain is used to evaluate how much a given displacement differs locally from a rigid body displacement. [1] [8] [9] One of such strains for large deformations is the Lagrangian finite strain tensor, also called the Green-Lagrangian strain tensor or Green–St-Venant strain tensor, defined as
To derive the equation of the Mohr circle for the two-dimensional cases of plane stress and plane strain, first consider a two-dimensional infinitesimal material element around a material point (Figure 4), with a unit area in the direction parallel to the -plane, i.e., perpendicular to the page or screen.
In mechanics, strain is defined as relative deformation, compared to a reference position configuration. Different equivalent choices may be made for the expression of a strain field depending on whether it is defined with respect to the initial or the final configuration of the body and on whether the metric tensor or its dual is considered.
For two-dimensional, plane strain problems the strain-displacement relations are = ; = [+] ; = Repeated differentiation of these relations, in order to remove the displacements and , gives us the two-dimensional compatibility condition for strains
Value-added theory (also known as social strain theory) is a sociological theory, first proposed by Neil Smelser in 1962, which posits that certain conditions are needed for the development of a social movement.