Damage evolution in brittle coating/substrate structures under three-point bending using discrete element method

Ghasemi, M.A.; Falahatgar, S.R.

doi:10.1016/j.surfcoat.2018.11.068

Cited by 14 publications

(4 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to simulate the shear failure behavior of materials, researchers usually use compression test [21,42,69] to study the mechanical properties, and use this to calibrate the shear parameters in the micro-parameters. Concurrently, the tensile test [62], Brazilian test [16,70] or bending test [71,72] are usually used to study the tensile failure of materials, and to calibrate the tensile parameters in the micro-parameters. In the calibration and validation process, the numerical simulation method is used to simulate the conventional mechanical properties of the material, and the macro-mechanical properties obtained by simulation are compared with the macro-mechanical properties obtained by experiment.…”

Section: Validation Testsmentioning

confidence: 99%

Discrete element modeling of the machining processes of brittle materials: recent development and future prospective

Jiang

Tang

et al. 2020

Int J Adv Manuf Technol

View full text Add to dashboard Cite

In recent years, the discrete element method (DEM) has been used to model the bulk material, especially for the brittle materials (such as rocks, ceramics, concrete, ice, etc.) with various mechanical properties or responses by setting serials of contact properties (such as bonds) in the particle assembly. These bonds can withstand a certain amount of force and/or moment, so that the stresses executed in the bond can be used for determining the initiation and propagation of micro-crack. There are increasing evidences over the last twenty years that the DEM is becoming an effective numerical method to simulate the cracking, crushing and deformation of continuous media under external loads. The DEM has now been widely used in the field of processing and machining of rock, ceramic, concrete and other brittle materials. In this paper, the theoretical principles, formulations, contact models as well as the numerical solving processes of DEM are introduced. The applications of DEM for the machining processes of brittle and rigid materials such as ceramics are described and reviewed in detail, with future development trend also discussed.

show abstract

Section: Validation Testsmentioning

confidence: 99%

Discrete element modeling of the machining processes of brittle materials: recent development and future prospective

Jiang

Tang

et al. 2020

Int J Adv Manuf Technol

View full text Add to dashboard Cite

show abstract

“…In this study, the discrete element method (DEM) is used to simulate the abrasive flow polishing process, which mainly refers to the analysis of the flow state between the abrasive particles and the dynamic parameters, between the abrasive particles and the abrasive particles and between the abrasive particles and the workpiece, thereby realising the quantitative and numerical analysis of the machining process [9,10]. Owing to fact that the DEM has a good ability to capture microscopic damage, Ghasemi and Falahatgar [11] used its code as a numerical tool to study the crack propagation simulation of brittle coating/matrix structure under three-point bending. Yin et al [12], based on the DEM to simulate the particle screening process on elliptical vibrating screen, studied the particle motion characteristics and screening mechanism on the sieve plate.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation analysis of four‐stage variable diameter pipe for solid–liquid two‐phase abrasive flow

Liu

Wang

et al. 2020

J. eng.

View full text Add to dashboard Cite

“…Minor et al 28 used DEM to simulate indentation-induced damages in ceramic thermal barrier coating. Ghasemi and Falahatgar 29 used DEM with cohesive contact model to simulate damage evolution in brittle coatings under three-point bending. Despite all of these, DEM has not been used to simulate channel cracking as well as delamination in ceramic coatings.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the effective parameters of through-the-width crack propagation in ceramic coatings due to substrate tension using discrete element method

Ghasemi

Falahatgar

2019

Proceedings of the Institution of Mechanical Engineers, Part L:

View full text Add to dashboard Cite

This paper aims to simulate surface cracking and interfacial delamination in ceramic coatings due to their application in different industries. For this purpose, one of the most widely used ceramics, yttrium-stabilized zirconia, which is used as a thermal insulator for superalloy substrate is considered as a case study. Discrete element method was used, due to its great ability to capture the damages at the microscale, to investigate the effect of crack spacing and coating thickness on crack initiation and propagation. Discrete element method solver code is provided by the authors. To investigate damages, a unit cell of the structure between two successive surface cracks was considered. The length of the unit cell represents the crack density in the structure. In addition, for each unit cell length, three coating thicknesses were considered. The results of the current study were compared and validated with those experiments and numerical simulation results presented in the open literature. Good agreement was found. Finally, the effect of interface roughness on stress distribution and damage initiation was examined.

show abstract

Damage evolution in brittle coating/substrate structures under three-point bending using discrete element method

Cited by 14 publications

References 39 publications

Discrete element modeling of the machining processes of brittle materials: recent development and future prospective

Discrete element modeling of the machining processes of brittle materials: recent development and future prospective

Numerical simulation analysis of four‐stage variable diameter pipe for solid–liquid two‐phase abrasive flow

Investigation on the effective parameters of through-the-width crack propagation in ceramic coatings due to substrate tension using discrete element method

Contact Info

Product

Resources

About