Results 201 to 210 of about 1,260,122 (250)

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
openaire   +1 more source

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 ...
openaire   +1 more source

Fatigue Debonding Three-dimensional Simulation with Cohesive Zone

The Journal of Adhesion, 2015
The cohesive zone model (CZM) has found a wide acceptance as a tool for the simulation of debonding in adhesive joints. Recently, fatigue-devoted implementations of CZM have been proposed. In earlier works, the authors have developed a model of the cohesive zone able to correctly simulate the propagation of fatigue of two-dimensional (2D) defects in ...
PIRONDI, Alessandro, GIULIESE, Gregorio, MORONI, Fabrizio   +2 more
openaire   +3 more sources

Instability during cohesive zone growth

Engineering Fracture Mechanics, 2009
Tensile microcracking of quasi-brittle materials is studied by means of micromechanics, based on (i) an elasto-damaging cohesive zone model accounting for cohesive softening and (ii) a dilute distribution of non-interacting microcracks of uniform orientation and size.
Bernhard Pichler, Luc Dormieux
openaire   +1 more source

Thermodynamics and the cohesive zone in fracture

Zeitschrift für angewandte Mathematik und Physik ZAMP, 1979
This paper discusses the thermodynamics of the cohesive zone preceding a running crack. Appropriate forms of the first two laws are given and some simple constitutive equations are discussed.
openaire   +1 more source

Rate Dependent Cohesive Zones

1997
Abstract : In work under another contract, we had studied the initiation of mode I tensile cracks (not delamination cracks) that tunnel down individual plies in brittle matrix laminates or woven textiles and then turn into plane cracks spreading across many plies en route to part failure. Under this contract, we unified this modeling with our models of
openaire   +1 more source

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
openaire   +1 more source

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.
openaire   +2 more sources

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
openaire   +1 more source

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.
openaire   +1 more source