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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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Jasiński, Cezary
Warsaw University of Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (6/6 displayed)
- 2020Strain Measurements in Free Tube Hydroforming Processcitations
- 2019A New Approach to Experimental Testing of Sheet Metal Formability for Automotive Industrycitations
- 2019Application of Two Advanced Vision Methods Based on Structural and Surface Analysesto Detect Defects in the Erichsen Cupping Testcitations
- 2017Determination of the formability limits for Grade 1 titanium sheet by means of ALSAD methodcitations
- 2016Extended evaluation of Erichsen cupping test results by means of laser specklecitations
- 2014Assessment of Erichsen Cupping Test Results by Means of Laser Speckles
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article
Determination of the formability limits for Grade 1 titanium sheet by means of ALSAD method
Abstract
Stamping is one of the most widely used sheet metal forming processes. Esthetics and durability of the deformed products arelimited by defects in the form of strain localization, grooves or cracks. Forming limits, e. g. in form of forming limit curve (FLC),help to avoid above-mentioned defects in the sheet metal during forming. Besides the common steel sheets for deep drawingprocesses, e.g. DC04, components can also be made of metal with specified strength and chemical resistance properties. One ofsuch materials is titanium sheet. In this paper, FLC for GR1 titanium sheet will be presented. It was obtained by means of a newauthor's method named as ALSAD (Analysis of Laser Speckle Activity Differences). So far, applied methods of FLCdetermination have been mainly based on the measurement of the strain distribution in the area of the created groove,deformation gradient and deformation speed. For this reason, detection of strain localization has been dependent on the strainmeasurement method. The ALSAD, based on laser speckle phenomenon allows detection of defects initiation on the samplesurface independently of the strain distribution measurement and it allows, for example, to relate a moment of defect initiationdirectly to the sample height or forces occurring in the process. In this paper strain values for strain localization, grooves andcracks for GR1 titanium sheet will be shown. Obtained results show good formability of this material, which was verified bymeans of 3D digital microscope. Such results allow tracing precisely the formation of the defects starting from strain localizationup to the crack appearance, which would be helpful for advanced numerical simulations.