A model for high temperature creep of single crystal superalloys based on nonlocal damage and viscoplastic material behavior

Trinh, Bach Tuyet; Hackl, Klaus

doi:10.1007/s00161-013-0317-6

Cited by 9 publications

(3 citation statements)

References 40 publications

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“…Extensive experimental work was performed and published by the University of Navada Las Vegas (UNLV) researchers relevant to several nickel base super alloys [5], [6]. Numerical results and comparisons with experimental data for the creep deformation of the single crystal superalloy LEK94 is discussed by Trinh and Hackl [7]. Hierarchical Multiscale Modeling of Ni-base Superalloys for creep deformation at elevated temperature is proposed by Jin E. Song [8].…”

Section: Introductionmentioning

confidence: 99%

ANN Modeling of Nickel Base Super Alloys for Time Dependent Deformation

Hasan

Hazza²,

AL-Grafi³

et al. 2014

JOACE

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Alloys 617 and 276 are nickel-based super alloys with excellent mechanical properties, oxidation, creepresistance, and phase stability at high temperatures. These alloys are used in complex and stochastic applications. Thus, it is difficult to predict their output characteristics mathematically. Therefore, the non-conventional methods for modeling become more effective. These two alloys have been subjected to time-dependent deformation at high temperatures under sustained loading of different values. The creep results have been used to develop the new models. Artificial neural network (ANN) was applied to predict the creep rate and the anelastic elongation for the two alloys. The neural network contains twenty hidden layer with feed forward back propagation hierarchical. The neural network has been designed with MATLAB Neural Network Toolbox. The results show a high correlation between the predicted and the observed results which indicates the validity of the models. 

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Section: Introductionmentioning

confidence: 99%

ANN Modeling of Nickel Base Super Alloys for Time Dependent Deformation

Hasan

Hazza²,

AL-Grafi³

et al. 2014

JOACE

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“…By this enhancement the continuous transition between undamaged and damaged phase can be captured via gradient parameters in terms of a substructure-related intrinsic length-scale. The damage evolution may be derived from the minimum principle for the dissipation potential [3]. The proposed approach is implemented by compiling a user subroutine with FEAP [4].…”

Section: Introductionmentioning

confidence: 99%

“…This enhancement gives rise to an introduction of gradient parameters in terms of a substructure-related intrinsic length-scale. The evolution of the phase-field based damage variable can be found from the minimum principle of the dissipation potential [3]. The performance of the proposed model is demonstrated through numerical results of a plate with a circular hole.…”

mentioning

confidence: 99%

On dynamic finite element analysis of viscoplastic thin‐walled structures with non‐local damage: A phase‐field approach

Nguyen

Trinh

Stoffel

et al. 2014

Proc Appl Math and Mech

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EN] In this work, a nonlocal damage model is proposed for dynamic analysis of viscoplastic shell structures using the phasefield approach. A phase-field variable on the mid surface is introduced to characterize the nonlocal damage as well as the transition between undamaged and damaged phase. The total free energy in [1] is modified as a sum of Helmholtz free-energy and Ginzburg-Landau one. The latter is defined as a function of the phase-field variable and its corresponding gradient. This enhancement gives rise to an introduction of gradient parameters in terms of a substructure-related intrinsic length-scale. The evolution of the phase-field based damage variable can be found from the minimum principle of the dissipation potential [3]. The performance of the proposed model is demonstrated through numerical results of a plate with a circular hole.

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Modeling of Microstructures in a Cosserat Continuum Using Relaxed Energies: Analytical and Numerical Aspects

Khan

Hackl

2021

Advances in Mechanics and Mathematics

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A model for high temperature creep of single crystal superalloys based on nonlocal damage and viscoplastic material behavior

Cited by 9 publications

References 40 publications

ANN Modeling of Nickel Base Super Alloys for Time Dependent Deformation

ANN Modeling of Nickel Base Super Alloys for Time Dependent Deformation

On dynamic finite element analysis of viscoplastic thin‐walled structures with non‐local damage: A phase‐field approach

Modeling of Microstructures in a Cosserat Continuum Using Relaxed Energies: Analytical and Numerical Aspects

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