On the suitability of a 3D discrete element method to model the composite damage induced by thermal expansion mismatch

Hassan, G. A.; Leclerc, Willy; Pelegris, Christine; Guessasma, Mohamed; Bellenger, Emmanuel

doi:10.1007/s40571-019-00298-1

Cited by 8 publications

(2 citation statements)

References 51 publications

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“…Besides, each layer of the TBC exhibits a distinctive response to the heating process due to its specific temperaturedependent CTE and creep parameters [4]. Thermal expansion effects are considered by adjusting the initial length of the cohesive beam elements L µ (T init ) with respect to the CTE of each layer and the applied temperature T [16] (see Figure 3) as follows:…”

Section: Thermal Loading and Expansion Modelmentioning

confidence: 99%

Discrete Element Method to simulate the thermo-mechanical behavior of plasma-sprayed thermal barrier coatings during a thermal cycle

Bensemmane,

Leclerc,

Ferguen

et al. 2023

VIII International Conference on Particle-Based Methods

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Thermal Barrier Coatings (TBCs) are multilayer systems used in Ni-based superalloy components for gas turbine blades submitted to high temperatures resulting in the development of high thermal stresses. The intricacy of their microstructure coupled to severe environmental conditions lead to their premature failure according to complex mechanisms involving notably creep and Coefficient of Thermal Expansion (CTE) mismatch effects. This work aims to investigate the development of thermal residual stress within TBCs during a heating step using a numerical model based on Discrete Element Method (DEM). The suitability of such an approach is investigated in terms of stress field distribution in comparison to Finite Element Method (FEM). Results reveal the capability of the proposed DEM approach to simulate creep phenomenon in a TBC system under thermal loading and predict accurately thermal stresses leading to failure.

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Section: Thermal Loading and Expansion Modelmentioning

confidence: 99%

Discrete Element Method to simulate the thermo-mechanical behavior of plasma-sprayed thermal barrier coatings during a thermal cycle

Bensemmane,

Leclerc,

Ferguen

et al. 2023

VIII International Conference on Particle-Based Methods

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“…Authors exhibited in the example of indentation test that the RDEF process leads to more realistic crack patterns than the classical bond-based Rankine criterion. Such a concept was later exploited to simulate cracks propagation and coalescence in homogeneous or heterogeneous materials under various mechanical or thermo-mechanical loadings [31][32][33][34]. Besides, several works focused on the simulation of delamination problems using CZM to simulate classical tests as double cantilever beam in mode I [35,36], end loaded split in mode II [35] and mixed mode bending in mixedmode [36].…”

Section: Introductionmentioning

confidence: 99%

Discrete element method to simulate interface delamination and fracture of plasma-sprayed thermal barrier coatings

Leclerc¹,

Ferguen²,

Lamini³

2022

Modelling Simul. Mater. Sci. Eng.

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This contribution deals with a Discrete Element Method (DEM) framework to simulate and investigate the mechanisms leading to the failure of plasma-sprayed Thermal Barrier Coating (TBC) systems. A hybrid lattice-particle approach is proposed to determine residual stress fields induced by the Coefficient of Thermal Expansion (CTE) mismatch during a cooling-down phase. Besides, this is combined with a mixed-mode Cohesive Zone Model (CZM) to simulate interface delamination, and the Removed Discrete Element Failure (RDEF) criterion to model crack initiation and propagation in TBC system. The context of a unit cell model with a perfectly sinusoidal interface profile is first investigated to highlight the suitability of the proposed DEM-based approach in terms of stress fields and failure process. The case of a real microstructure reproduced by the image processing is then discussed. This underlines the effect of porosity and surface asperities on the failure mechanisms. Results exhibit the potential of the proposed DEM approach to model complex cracks phenomena occurring in TBC systems under thermal loading.

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Insight of Discrete Scale and Multiscale Methods for Characterization of Composite and Nanocomposite Materials

Sheikh

Behdinan

2022

Arch Computat Methods Eng

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On the suitability of a 3D discrete element method to model the composite damage induced by thermal expansion mismatch

Cited by 8 publications

References 51 publications

Discrete Element Method to simulate the thermo-mechanical behavior of plasma-sprayed thermal barrier coatings during a thermal cycle

Discrete Element Method to simulate the thermo-mechanical behavior of plasma-sprayed thermal barrier coatings during a thermal cycle

Discrete element method to simulate interface delamination and fracture of plasma-sprayed thermal barrier coatings

Insight of Discrete Scale and Multiscale Methods for Characterization of Composite and Nanocomposite Materials

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