Wszystkie pola: thermodynamically consistent model - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Three-dimensional model of thermomechanical evolution of shape memory materials
Autorzy:: Pawłow, I.
Powiązania:: https://bibliotekanauki.pl/articles/205532.pdf
Data publikacji:: 2000
Wydawca:: Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:: termodynamika
martensitic phase transformation
shape memory
thermodynamically consistent model
thermomechalical evolution
Opis:: We derive a thermodynamically consistent model of the thermomechanical evolution of shape memory materials in three dimensions. The model is based on the linearized strain tensor and the absolute temperature as state variables. It accounts for the viscous and spatially nonlocal effects, and constitutes a generalization of the one-dimensional Falk model. The constitutive equations comply with the entropy inequality. Examples of free energies characteristic for shape memory alloys and noncrystalline materials are given.
Źródło:: Control and Cybernetics; 2000, 29, 1; 341-365
0324-8569
Pojawia się w:: Control and Cybernetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: An alternative material model using a generalized J2 finite-strain flow plasticity theory with isotropic hardening
Autorzy:: Ecsi, L.
Elesztos, P.
Powiązania:: https://bibliotekanauki.pl/articles/264832.pdf
Data publikacji:: 2018
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: teoria plastyczności
utwardzanie izotropowe
odkształcenia plastyczne
nonlinear continuum theory of finite deformations of elasto-plastic media
generalized J2 flow plasticity theory with isotropic hardening
objective and thermodynamically consistent formulationg
Opis:: In this paper an alternative material model using a generalized J2 finite-strain flow plasticity theory with isotropic hardening is presented. The model is based on a new nonlinear continuum mechanical theory of finite deformations of elasto-plastic media which allows for the development of objective and thermodynamically consistent material models. As a result, the constitutive equation, the evolution equation and even the ‘normality rule’, characterising the plastic flow in the material during return mapping, can be expressed in various forms, using several instances of the yield surface and corresponding pairs of stress measures and strain rates, respectively, which are conjugate with respect to the internal mechanical power and its arbitrary higher order time derivative. Therefore the results of the material model when used in numerical analyses are not affected by the description and particularities of the material model formulation. Here, we briefly outline the nonlinear continuum theory along with a detailed description of the material model and finally present the model in a numerical example using a cross-shaped specimen in biaxial tension.
Źródło:: International Journal of Applied Mechanics and Engineering; 2018, 23, 2; 339-353
1734-4492
2353-9003
Pojawia się w:: International Journal of Applied Mechanics and Engineering
Dostawca treści:: Biblioteka Nauki

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