A Cohesive-frictional interface model subjected to mixed complex loading paths

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Abstract

The paper presents a cohesive-frictional interface model based on surface damage mechanics. The proposed model is developed under the assumption that the fracture energies in mode I and in mode II are different values, as shown by several experimental evidences. At difference with the most spread available interface models, only one isotropic interface internalvariable is adopted for the constitutive model. The interface constitutive model is developed in a Thermodynamic consistent framework with an Helmholtz free energy potential and the fulfillment of the thermodynamic principles is obtained enforcing the Clausius-Duhem inequality.The damage/friction activation functions and dissipative flow potentials are defined together with nonassociative flow rules and loading/unloading conditions. The latter loading/unloading conditions emerge directly from the nature of the proposed approach, which is framed in the mechanics dissipative process with internal variables, and then does not require any special ad-hoc unloading rule. Finally, some numerical examples of interface subjected to complex mixed loading/unloading/reloading paths are analyzed.
Original languageEnglish
Pages1833-1842
Number of pages10
Publication statusPublished - 2017

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Unloading
Constitutive models
Mechanics
Thermodynamics
Fracture energy
Potential flow
Free energy
Chemical activation
Friction

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Mechanics of Materials

Cite this

@conference{1842122221784f5592c71776554a5051,
title = "A Cohesive-frictional interface model subjected to mixed complex loading paths",
abstract = "The paper presents a cohesive-frictional interface model based on surface damage mechanics. The proposed model is developed under the assumption that the fracture energies in mode I and in mode II are different values, as shown by several experimental evidences. At difference with the most spread available interface models, only one isotropic interface internalvariable is adopted for the constitutive model. The interface constitutive model is developed in a Thermodynamic consistent framework with an Helmholtz free energy potential and the fulfillment of the thermodynamic principles is obtained enforcing the Clausius-Duhem inequality.The damage/friction activation functions and dissipative flow potentials are defined together with nonassociative flow rules and loading/unloading conditions. The latter loading/unloading conditions emerge directly from the nature of the proposed approach, which is framed in the mechanics dissipative process with internal variables, and then does not require any special ad-hoc unloading rule. Finally, some numerical examples of interface subjected to complex mixed loading/unloading/reloading paths are analyzed.",
author = "Francesco Parrinello and Guido Borino",
year = "2017",
language = "English",
pages = "1833--1842",

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TY - CONF

T1 - A Cohesive-frictional interface model subjected to mixed complex loading paths

AU - Parrinello, Francesco

AU - Borino, Guido

PY - 2017

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N2 - The paper presents a cohesive-frictional interface model based on surface damage mechanics. The proposed model is developed under the assumption that the fracture energies in mode I and in mode II are different values, as shown by several experimental evidences. At difference with the most spread available interface models, only one isotropic interface internalvariable is adopted for the constitutive model. The interface constitutive model is developed in a Thermodynamic consistent framework with an Helmholtz free energy potential and the fulfillment of the thermodynamic principles is obtained enforcing the Clausius-Duhem inequality.The damage/friction activation functions and dissipative flow potentials are defined together with nonassociative flow rules and loading/unloading conditions. The latter loading/unloading conditions emerge directly from the nature of the proposed approach, which is framed in the mechanics dissipative process with internal variables, and then does not require any special ad-hoc unloading rule. Finally, some numerical examples of interface subjected to complex mixed loading/unloading/reloading paths are analyzed.

AB - The paper presents a cohesive-frictional interface model based on surface damage mechanics. The proposed model is developed under the assumption that the fracture energies in mode I and in mode II are different values, as shown by several experimental evidences. At difference with the most spread available interface models, only one isotropic interface internalvariable is adopted for the constitutive model. The interface constitutive model is developed in a Thermodynamic consistent framework with an Helmholtz free energy potential and the fulfillment of the thermodynamic principles is obtained enforcing the Clausius-Duhem inequality.The damage/friction activation functions and dissipative flow potentials are defined together with nonassociative flow rules and loading/unloading conditions. The latter loading/unloading conditions emerge directly from the nature of the proposed approach, which is framed in the mechanics dissipative process with internal variables, and then does not require any special ad-hoc unloading rule. Finally, some numerical examples of interface subjected to complex mixed loading/unloading/reloading paths are analyzed.

UR - http://hdl.handle.net/10447/263422

UR - http://www.aimeta2017.unisa.it/node/52

M3 - Other

SP - 1833

EP - 1842

ER -