Micro-to-macro transition accounting for general imperfect interfaces

Journal article


Publication Details

Author(s): Javili A, Steinmann P, Mosler J
Journal: Computer Methods in Applied Mechanics and Engineering
Publication year: 2017
Volume: 317
Pages range: 274-317
ISSN: 0045-7825


Abstract

The objective of this contribution is to establish a micro-to-macro transition framework to study the behavior of heterogeneous materials whereby the influence of interfaces at the microscale is taken into account. The term ``interface'' refers to a zero-thickness model that represents the finite thickness ``interphase'' between the constituents of the micro-structure. For geometrically equivalent samples, due to increasing area-to-volume ratio with decreasing size, interfaces demonstrate a more pronounced effect on the material response at small scales. A remarkable outcome is that including interfaces introduces a length-scale and our interface-enhanced computational homogenization captures a size effect in the material response even if linear prolongation conditions are considered. Furthermore, the interface model in this contribution is general imperfect in the sense that it allows for both jumps of the deformation as well as for the traction across the interface. Both cohesive zone model and interface elasticity theory can be derived as two limit cases of this general model. We establish a consistent computational homogenization scheme accounting for general imperfect interfaces. Suitable boundary conditions to guarantee meaningful averages are derived. Clearly, this general framework reduces to classical computational homogenization if the effect of interfaces is ignored. Finally, the proposed theory is elucidated via a series of numerical examples.


FAU Authors / FAU Editors

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


Additional Organisation
Exzellenz-Cluster Engineering of Advanced Materials


External institutions with authors

Bilkent University / Bilkent Üniversitesi
Technische Universität Dortmund


Research Fields

E Lightweight Materials
Exzellenz-Cluster Engineering of Advanced Materials
A3 Multiscale Modeling and Simulation
Exzellenz-Cluster Engineering of Advanced Materials


How to cite

APA:
Javili, A., Steinmann, P., & Mosler, J. (2017). Micro-to-macro transition accounting for general imperfect interfaces. Computer Methods in Applied Mechanics and Engineering, 317, 274-317. https://dx.doi.org/10.1016/j.cma.2016.12.025

MLA:
Javili, Ali, Paul Steinmann, and Joern Mosler. "Micro-to-macro transition accounting for general imperfect interfaces." Computer Methods in Applied Mechanics and Engineering 317 (2017): 274-317.

BibTeX: 

Last updated on 2019-13-03 at 16:08