Titlebook: Unified Constitutive Equations for Creep and Plasticity; Alan K. Miller (Professor (Research) of Materials Book 1987 Elsevier Applied Sci

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,State Variable Theories Based on Hart’s Formulation,chanical history by current values of state variables. By virtue of this a state variable theory can organize and rationalize a wealth of accumulated data, and the ensuing economy in thought will automatically lead to economy in experiment.. Moreover, with the aid of state equations, material behavi

Nonflammable

The MATMOD Equations, attempt to cover the . set of phenomena. These are enumerated in Table 1. Like many of the other unified approaches, the MATMOD equations treat most of the phenomena within the categories of ‘creep’ and ‘plasticity’; however, the equations are also designed to predict many aspects of cyclic deforma

沉着

The Mechanical Equation of State,ion (if any) but also the transient creep which follows every change in the stress system. In this chapter we indicate the progress that is being made to arrive at such an equation and the resultant equation that has been developed.

凹槽

A Physically Based Internal Variable Model for Rate Dependent Plasticity, inelastic strain rate, applied stress, and instantaneous value of two internal variables.. The internal variables were permitted to evolve by a Bailey—Orowan process, including strain hardening and recovery. Hardening was taken to be linear and to increase the internal variables rather than the flo

Rheumatologist

,Review of a Unified Elastic—Viscoplastic Theory,rly work is given by Bell.), engineering thinking on material behavior has been dominated by the considerable success of the classical elastic and plastic theories. In contrast, the work on ‘dislocation dynamics’ in the 1950s and early 1960s by Johnston and Gilman. and by Hahn. and others was based

偏见

协迫

Expertise

,Review of a Unified Elastic—Viscoplastic Theory,ensional and restricted to simple loading histories such as uniaxial extension and creep. One of the main interests in those studies was to obtain the form of the equations and the material constants from measurements of microstructural quantities.

背景

Summary and Critique,faceted as stated above. Some authors have made a great effort to model time-dependent monotonic mechanical loading, others cyclic mechanical loading, and others multiaxial or temperature effects. Each author has also identified microstructural processes which he is modeling, and these are not the same in every case.