Publication detail

Coupled sliding-decohesion-compression model for a consistent description of monotonic and fatigue behavior of material interfaces

CHUDOBA, R. VOŘECHOVSKÝ, M. AGUILAR RUEDA, M. BAKTHEER, A.

Original Title

Coupled sliding-decohesion-compression model for a consistent description of monotonic and fatigue behavior of material interfaces

Type

journal article in Web of Science

Language

English

Original Abstract

A thermodynamically consistent model proposed in this work introduces a generative symbolic framework for computational components, which can capture the inelastic behavior of interfaces with 3D kinematics in response to monotonic, cyclic, and fatigue loading histories. It contributes to a long list of existing cohesive zone models by introducing novel forms of potentials for free energy, threshold function, and dissipation to deliver the following model properties: (i) the evolution equations derived from the potentials are linked in such a way that damage develops along with the cumulative measure of plastic sliding, (ii) the convex, continuous, and smooth shape of the threshold function introduced in the effective stress domain enables a general and efficient time integration that automatically handles unloading and reloading, and (iii) the non-associative flow potential includes a scalable degree of coupling between normal and tangential damage evolution. The studies performed in the paper demonstrate that these model ingredients lead to a consistent coverage of arbitrary non-proportional loading scenarios in tangential and normal directions. For monotonic loading, the presented examples illustrate the ability of the model to reproduce the shear dilatancy, pressure sensitivity including the vertex effect, stiffness recovery in compression, and abrasion due to sliding. For cyclic fatigue loading, the studies show that the model reflects the link between the hysteretic behavior and the fatigue damage evolution. This link constitutes the basis for a physically sound description of fatigue degradation along material interfaces. It manifests itself in the presented energy breakdown with distinguished fractions of energy release due to damage and plasticity ascribed to normal and tangential directions. Two calibration and validation examples using pull-out tests exposed to monotonic and cyclic loading are provided to show the applicability of the model for the characterization of the bond between steel bars and concrete. A publicly available implementation using a computer algebra system (CAS) is provided in the form of an interactive Jupyter notebook to document the reproducibility of the results. (c) 2022 Elsevier B.V. All rights reserved.

Keywords

Damage-plasticity; Mode-I-II fracture; Cyclic cohesive model; Hysteretic behavior; Fatigue loading

Authors

CHUDOBA, R.; VOŘECHOVSKÝ, M.; AGUILAR RUEDA, M.; BAKTHEER, A.

Released

1. 8. 2022

Publisher

ELSEVIER SCIENCE SA

Location

LAUSANNE

ISBN

0045-7825

Periodical

COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING

Year of study

398

Number

August

State

Kingdom of the Netherlands

Pages count

30

URL

https://www.sciencedirect.com/science/article/pii/S0045782522003887

BibTex

@article{BUT180386,
  author="Rostislav {Chudoba} and Miroslav {Vořechovský} and Mario {Aguilar Rueda} and Abedulgader {BAKTHEER}",
  title="Coupled sliding-decohesion-compression model for a consistent description of monotonic and fatigue behavior of material interfaces",
  journal="COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING",
  year="2022",
  volume="398",
  number="August",
  pages="30",
  doi="10.1016/j.cma.2022.115259",
  issn="0045-7825",
  url="https://www.sciencedirect.com/science/article/pii/S0045782522003887"
}