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Damage Prediction and Evolution using Uncoupled Elastoplastic-Damage Lemaitre’s and Vaz’s Models
Faculty
Engineering
Year:
2021
Type of Publication:
ZU Hosted
Pages:
Authors:
Ahmed Mohamed Gad Ali Elshafay
Staff Zu Site
Abstract In Staff Site
Journal:
The Egyptian International Journal of Engineering Sciences and Technology Department of Mechanical Design and Production Engineering, Faculty of Engineering, Zagazig University, Zagazig
Volume:
Keywords :
Damage Prediction , Evolution using Uncoupled Elastoplastic-Damage
Abstract:
This paper presents the two uncoupled elastoplastic-damage models; uncoupled Lemaitre’s and Vaz’s damage models. The two models are implemented into the finite element ABAQUS software using user routine UMAT to analyze and predict damage and damage evolution. In the context of von-Mises yield criteria, damage variable and fracture indicator are predicted, in addition to the von-Mises stress and the effective plastic strain. Both the elastoplastic tangent operator and the return mapping procedure are formulated using the consistent formulation. Two cases have been analyzed; the first one is an axisymmetric notched bar, while the second case is a plane strain doubled notched plate. In addition to the aforementioned predictions, a parametric study is carried out to explore the effect of the damage denominator and damage exponent on the damage behavior. It is concluded that the two models succeeded in the prediction of the point of fracture, while the uncoupled Lemaitre's damage model gives a more efficient description of the damage band.
Author Related Publications
Ahmed Mohamed Gad Ali Elshafay, "A random microstructure-based model to study the effect of the shape of reinforcement particles on the damage of elastoplastic particulate metal matrix composites", Department of Mechanical Design and Production Engineering, Faculty of Engineering, Zagazig University, 2021
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Ahmed Mohamed Gad Ali Elshafay, "Predictive Computational Model for Damage Behavior of Metal-Matrix Composites Emphasizing the Effect of Particle Size and Volume Fraction", Department of Mechanical Design and Production Engineering, Faculty of Engineering, Zagazig University, Zagazig, 2021
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Ahmed Mohamed Gad Ali Elshafay, "Influence of surface energy on the nanoindentation response of elastically-layered viscoelastic materials", Springer, 2015
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Ahmed Mohamed Gad Ali Elshafay, "Tribological Characterization of Hybrid Metal Matrix Composites Processed by Powder Metallurgy", springer, 2017
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Ahmed Mohamed Gad Ali Elshafay, "Modeling and analysis of the transient response of viscoelastic solids", Taylor and Francis, 2021
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Department Related Publications
Adel Fathy Meselhy Ibrahiem, "Effect of some manufacturing parameters on mechanical properties of extruded Al-alumina composites", لايوجد, 1900
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Ashraf Abdelfattah Ali Hassanein, "A novel 3-D graphite structure from thermally stabilized electrospun MWCNTs/PAN nanofibril composite fabrics", International Journal of Advanced Manufacturing Technology, 2014
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Amal Elhosaieny Meselhy Alshorbagy, "Free vibration characteristics of a functionally graded beam by finite element method", www.elsevier.com/locate/apm, 2010
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Mohammed Abdelmoniem Mohamed Eltaher , "Static and buckling analysis of functionally graded Timoshenko nanobeams", www.elsevier.com, 2014
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Tamer Ali Abdella Sebaee, "AN EXPERIMENTAL STUDY ON THE BOLTED JOINT CONNECTIONS IN GFRE [0/90]2S LAMINATES", Minoufiya University, 2009
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