Results 261 to 270 of about 14,585 (306)

A micromechanical model for a viscoelastic cohesive zone

International Journal of Fracture, 2001
A micromechanical model for a viscoelastic cohesive zone is formulated herein. Care has been taken in the construction of a physically-based continuum mechanics model of the damaged region ahead of the crack tip. The homogenization of the cohesive forces encountered in this region results in a damage dependent traction-displacement law which is both ...
David H. Allen, Chad R. Searcy
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A cohesive zone model for thermomechanical fatigue

International Journal of Fatigue, 2020
Abstract In this study, a temperature dependent elastic-viscoplastic cohesive zone model is developed to predict the thermomechanical fatigue (TMF) behaviour of superalloys. The theory is based on rheological models enhanced with fatigue and creep damage variables which are micro-mechanically motivated.
Jeffy Abraham, Stephan Roth, Meinhard Kuna   +2 more
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Cohesive Zone Modeling for Adhesives

2009
Adhesives are very widely used in industry. In each application field, the adhesive that is used must fulfill specific requirements. Adhesive types can be classified for instance by their (thermo-) mechanical properties, their machining or their curing conditions. This paper describes, by way of example, the characterization criteria for structural and
Matthias Nossek, Stephan Marzi
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Triaxiality dependent cohesive zone model

Engineering Fracture Mechanics, 2009
Abstract A versatile cohesive zone model to predict ductile fracture at different states of stresses is proposed. The formulation developed for mode-I plane strain accounts for triaxiality of the stress-state explicitly by using basic elastic–plastic constitutive relations combined with two stress-state independent new model parameters.
Anuradha Banerjee, R. Manivasagam
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Analytical solutions for cohesive zone models

Journal of the Mechanics and Physics of Solids, 2002
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Williams, J. G., Hadavinia, H.
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The Cohesive Zone Model

2017
According to what has been summarized in the previous chapters, simulations are performed with the Rousselier and the Gurson-Tvergaard-Needleman (GTN) models predicting the crack propagation of the C(T)-specimens with different initial crack positions, i.e., the initial crack located in the BM, in the centre of the FZ and at the interface between the ...
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Modeling of Bone Failure by Cohesive Zone Models

2013
Cohesive zone models are a powerful tool for investigations of non-linear deformation and failure processes. For the nanoscale, the use of cohesive zone models is particularly attractive as the ratio of interface to volume is high, and because locally acting bonds between material components can become relevant.
Thomas Siegmund, Matthew R. Allen, David B. Burr   +2 more
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On the Cohesive Zone Model for a Finite Crack

International Journal of Fracture, 1999
The paper concentrates on the development of the crack tip model with the cohesive zone in an infinite plate with a finite crack of mode I. The estimation of the length of the cohesive zone and the crack tip opening displacement is based on the comparison of the local stress concentration according to Westergaard's theory with the cohesive stress.
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Cohesive zone modeling of thin aluminium sheets

Materials Today: Proceedings, 2020
Abstract Single edge notch (SEN) aluminium specimens of widths (D): 20, 40 and 50 mm are tested under uniaxial tensile loading for a strain rate of 0.005/min. The notch depth to width ratio (a/D = 0.25) and the gauge length to width ratio (L/D = 2.5) are constant for these tested specimens.
O.S. Vishnu, Mahendra Gattu
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Combining interface damage and friction in a cohesive‐zone model

International Journal for Numerical Methods in Engineering, 2006
AbstractA new method to combine interface damage and friction in a cohesive‐zone model is proposed. Starting from the mesomechanical assumption, typically made in a damage‐mechanics approach, whereby a representative elementary area of the interface can be additively decomposed into an undamaged and a fully damaged part, the main idea consists of ...
ALFANO G., E. SACCO
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