A thermo-mechanical cohesive zone model accounting for mechanically energetic Kapitza interfaces

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autor(en): Esmaeili A, Javili A, Steinmann P
Zeitschrift: International Journal of Solids and Structures
Jahr der Veröffentlichung: 2016
ISSN: 0020-7683


Abstract

Interfaces can play a dominant role in the thermo-mechanical response of a body. The importance of interfaces is more pronounced as the problem scale decreases since the interface area to the bulk volume ratio grows. The objective of this contribution is to study computational aspects of modeling thermo-mechanical solids containing mechanically energetic, geometrically non-coherent Kapitza interfaces under cyclic loading. The interface is termed energetic in the sense that it possesses its own energy, entropy, constitutive relations and dissipation. To date, classical thermomechanical cohesive zone models do not account for elastic interfaces. Therefore we propose a novel interface model that couples the classical cohesive zone formulation to the interface elasticity theory under the Kapitza assumption within a thermo-mechanical framework. In other words, such an interface model allows for discontinuities in geometry, temperature and normal stress fields, while not permitting a jump in the normal heat flux across the interface. The equations governing a fully non-linear transient problem are given. They are solved using the finite element method. The results are illustrated through a series of three-dimensional numerical examples for various interfacial parameters. In particular, a comparison is made between the results of the classical thermo-mechanical cohesive zone model and our novel (cohesive + energetic Kapitza) interface formulation.


FAU-Autoren / FAU-Herausgeber

Esmaeili, Ali
Lehrstuhl für Technische Mechanik
Javili, Ali
Lehrstuhl für Technische Mechanik
Steinmann, Paul Prof. Dr.-Ing.
Lehrstuhl für Technische Mechanik


Zusätzliche Organisationseinheit(en)
Lehrstuhl für Technische Mechanik
Exzellenz-Cluster Engineering of Advanced Materials


Zitierweisen

APA:
Esmaeili, A., Javili, A., & Steinmann, P. (2016). A thermo-mechanical cohesive zone model accounting for mechanically energetic Kapitza interfaces. International Journal of Solids and Structures. https://dx.doi.org/10.1016/j.ijsolstr.2016.04.035

MLA:
Esmaeili, Ali, Ali Javili, and Paul Steinmann. "A thermo-mechanical cohesive zone model accounting for mechanically energetic Kapitza interfaces." International Journal of Solids and Structures (2016).

BibTeX: 

Zuletzt aktualisiert 2019-14-03 um 12:38