| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Pletz, Martin
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2023Comparing crack density and dissipated energy as measures for off-axis damage in composite laminatescitations
- 2022Combined Crack Initiation and Crack Growth Model for Multi-Layer Polymer Materialscitations
- 2022Efficient prediction of crack initiation from arbitrary 2D notchescitations
- 2022Improved concept for iterative crack propagation using configurational forces for targeted angle correctioncitations
- 2022Efficient Finite Element Modeling of Steel Cables in Reinforced Rubbercitations
- 2021CrackDect: Detecting crack densities in images of fiber-reinforced polymerscitations
- 2019Constitutive modeling of anisotropic plasticity with application to fiber-reinforced compositescitations
- 2019Investigation of deformation mechanisms in manganese steel crossings using FE modelscitations
- 2017Permeability Customisation through Preform Manipulation Utilising 3D-Printing Technology
- 2016A finite element model to simulate the physical mechanisms of wear and crack initiation in wheel/rail contactcitations
- 2016Residual lifetime determination of low temperature co-fired ceramics
- 2014Rolling Contact Fatigue of Three Crossing Nose Materials—Multiscale FE Approachcitations
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article
Efficient prediction of crack initiation from arbitrary 2D notches
Abstract
<p>An efficient two-scale approach for predicting mode I crack initiation from 2D notches based on the Coupled Criterion is proposed. On the scale of the local model, a voxel model containing the notch simulates the displacement field. The crack model is introduced on the smaller scale and is defined in an image space. Based on the notch curvature, the precomputed crack model can be transformed to any position on the notch surface. The displacement field of the local model is fitted at the boundaries of the transformed crack model by predefined deformation modes and results can be obtained by a superposition of precomputed crack model results. By introducing the crack in the crack model, the stiffness of this model is reduced and thus, the incremental energy release rate can be inaccurate. Therefore, a boundary relaxation approach is used to obtain more accurate energy release rates. It is shown that the method is very efficient as it requires only 3:20 min to analyze 50 positions on a notch compared to 2:21 h of a conventional approach using full FEM simulations. Thereby, the method is reliable in identifying the critical position. The predicted failure index at this position deviates by at most 10.8%. Since the crack model limits the length of initiating cracks, Irwin's length K<sub>Ic</sub><sup>2</sup>/σ<sub>c</sub><sup>2</sup> of the material must lie below 2.53 times the radius of a circular hole under uniaxial tension. For a brittle material like Al<sub>2</sub>O<sub>3</sub>, notches with a curvature radius above 31μm can thus be analyzed.</p>