A thermomechanical cohesive zone model for bridged delamination cracks

Hattiangadi, Ashwin

doi:10.1016/s0022-5096(03)00122-4

Cited by 49 publications

(24 citation statements)

References 54 publications

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“…That is, the thermo-mechanical contact formulations of Zavarise et al (1992a) and Pantuso et al (2000), and the hydrogen diffusion-interface debonding model of Liang and Sofronis (2003). Furthermore, the present model is related to previous work by Hattiangadi and Siegmund (2004) on a thermo-mechanical crack bridging model.…”

Section: Introductionmentioning

confidence: 79%

A numerical study on interface crack growth under heat flux loading

Hattiangadi

Siegmund

2005

International Journal of Solids and Structures

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A numerical framework for the coupled thermo-mechanical analysis of crack growth in structures loaded by an applied heat flux is outlined. Using a thermo-mechanical cohesive zone model (TM-CZM), load transfer behavior is coupled to heat conduction across an interface and the corresponding interface crack. Nonlinear effects occur due to the coupling between the mechanical and thermal problem introduced by the conductance-separation response between crack faces as well as through the temperature dependence of material constants of the CZM. The description of the load transfer behavior uses a traction-separation law with an internal residual property variable that characterizes the extent of damage caused by mechanical loading. The description of thermal transport includes a representation of the breakdown of interface conductance with increase in material separation. The current state of interface failure, the presence of gas entrapped in the crack, the radiative heat transfer across the crack and a contact conductance between crack faces determine the cohesive zone conductance. The TM-CZM is implemented into a finite element code and applied in the study of interface crack growth between an oxidation protection coating on a thermal protection material.

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Section: Introductionmentioning

confidence: 79%

A numerical study on interface crack growth under heat flux loading

Hattiangadi

Siegmund

2005

International Journal of Solids and Structures

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“…The microstructure is composed of single crystal alumina grains with a tetragonal crystal Since the contact conductivity model is based on the interaction of isotropic materials, the larger principal conductivity value is used in Eq. (10). The top boundary is exposed to a ramp type prescribed temperature boundary condition which reaches the peak temperature of 1,000 • C within 4 seconds and which is kept constant until the end of the loading duration of 10 s. The bottom surface is kept at 20 • C throughout the analysis.…”

Section: Thermo-mechanical Analysis Of a Granular Microstructurementioning

confidence: 99%

“…Alternatively [10] proposes a micromechanically motivated thermo-mechanical cohesive zone description for fiber-reinforced ceramic matrix composites, which however does not take into account the thermal strains of the bridging fibers. Pursuing a phenomenological approach, the same authors presented a model [5,11] where the heat transfer along the interface is neglected.…”

Section: Introductionmentioning

confidence: 99%

A Thermo-mechanical cohesive zone model

2010

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In this paper, a cohesive zone formulation that is suitable for the thermo-mechanical analysis of heterogeneous solids and structural systems with contacting/ interacting components, is presented. Well established traction-opening relations are adopted and combined with micromechanically motivated heat flux-opening relations reflecting the evolving heat transfer through the interfaces. The finite element approach for a coupled analysis within an operator-split solution framework is presented and demonstrated with an example problem.

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“…A thermally imperfect interface model, applicable to heterogeneous solids, which utilizes a cohesive zone formulation, was proposed by Özdemir et al (2010) . Fleischhauer et al (2013) recently derived a finite-strain, thermo-mechanical cohesive zone model, using the finite element method (see also Hattiangadi and Siegmund, 2004;.…”

Section: Introductionmentioning

confidence: 99%

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

Esmaeili

Javili

Steinmann

2016

International Journal of Solids and Structures

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a b s t r a c tInterfaces 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 thermomechanical 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 thermo-mechanical 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 thermomechanical 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.

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A thermomechanical cohesive zone model for bridged delamination cracks

Cited by 49 publications

References 54 publications

A numerical study on interface crack growth under heat flux loading

A numerical study on interface crack growth under heat flux loading

A Thermo-mechanical cohesive zone model

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

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