A Quasi-Static Delamination Model with Rate-Dependent Interface Damage Exposed to Cyclic Loading

Vodička, Roman; Krajníková, Katarína

doi:10.4028/www.scientific.net/kem.774.84

Cited by 3 publications

(4 citation statements)

References 16 publications

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“…We use the model to find solutions for various amplitudes and various maxima of the same load type applied to the domain shown in Fig. 3 (see also [6][7][8]). The model formulation is implemented in a MATLAB computer code.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…The present solution approach introduces a model working with energy evolution, which involves the stored elastic energy, energy of the external load and also dissipation due to damage. To simulate the fatigue processes, the dissipation potential has a rate-dependent form with hysteresis associated to damage, see also [4][5][6]. The CZMs in the context of the energy evolution were implemented in [7,8] and a simple viscous term was also tested in [9].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A boundary element approach for an interface visco-damage model exposed to cyclic shear load

Vodička¹,

Krajníková²

2019

Int. J. CMEM

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A computational model for analysis of rate-dependent interface damage which leads to interface crack initiation and propagation in multi-domain structures exposed to shear type cyclic loading is presented. Modelling of interface damage, accounting generally for various stress vs. separation relations of common cohesive zone models in this type of models, is restricted here to one with an exponential relation. The model also includes viscosity and internal parameters for the interface damage to observe a fatiguelike behaviour where a crack appears for smaller magnitudes of periodical loadings in comparison to pure uploading. The computational approach, physically based on evolution of stored and dissipated energies, behind the model results in a kind of variational formulation. Moreover, solving the problem for variables characterising the elastic state of the structure, the multi-domain symmetric Galerkin boundary element method is advantageously used. Finally, the variational character of the solution requires implementation of (sequential-) quadratic programing solvers into the computer code which is fully implemented in MATLAB. The presented numerical results for a rather academic structure demonstrate the properties of the described model and enable to extend its applicability to more general problems of engineering practice.

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Section: Numerical Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A boundary element approach for an interface visco-damage model exposed to cyclic shear load

Vodička¹,

Krajníková²

2019

Int. J. CMEM

Self Cite

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show abstract

“…The dissipation potential is considered in a damage rate dependent form with some kind of hysteresis associated to damage, see also [4,5]. The CZMs in a context of the energy evolution were implemented in [6] and a related simple hysteretic model was demonstrated in [7,8]. In the present approach, the viscous term and also the damage triggering term of dissipation are formulated as state dependent in order to provide a better control of the hysteretic model so that the unloading and reloading paths were non-coincident.…”

Section: Introductionmentioning

confidence: 99%

“…The of the stress-separation curves in right pictures of both Figs. 7 8 can be compared to Fig. 1 and reflects used degradation function Φ.…”

mentioning

confidence: 99%

An Influence of Cyclic Loading on Behaviour of a Hysteretic Interface Damage Model

Vodička

2019

KEM

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A computational interface damage model which takes into account crack initiation andgrowth along connections between parts of a multi-domain structure is proposed and is exposed tosituations where cyclic loading and its effects on the structure are noticeable, though the inertial effects are not considered. Modelling of damage takes into account various aspects of damage propagation and invoking of an interface crack. First, the degradation function of the interface layer controls the stressseparation relation on damage evolution. Second, the instant of triggering and cessation of damage propagation may in situations of cyclic loads depend on the actual state of the structure, influencing thus its endurance limit. Finally, the hysteretic character of damage provides together with loadingunloading conditions a fatigue-like character, where the crack appears for smaller magnitude of the cyclic load than for pure uploading. The numerical solution and a short parametric study is provided for a simplified situation of single damageable interface spring.

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A new quasi-static delamination model with rate-dependence in interface damage and its operation under cyclic loading

Vodička

2021

International Journal of Solids and Structures

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A Quasi-Static Delamination Model with Rate-Dependent Interface Damage Exposed to Cyclic Loading

Cited by 3 publications

References 16 publications

A boundary element approach for an interface visco-damage model exposed to cyclic shear load

A boundary element approach for an interface visco-damage model exposed to cyclic shear load

An Influence of Cyclic Loading on Behaviour of a Hysteretic Interface Damage Model

A new quasi-static delamination model with rate-dependence in interface damage and its operation under cyclic loading

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