Conférences
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Achraf Kallel, Menad Lamraoui, Joseph Fitoussi AND Abbas Tcharkhtchi The residual stress effect on the Shape Memory Polymers 5500 - 5599 Conférence ICRS-10, 2016. Résumé | BibTeX @conference{ICRS-10,
title = {The residual stress effect on the Shape Memory Polymers },
author = {Achraf Kallel, Menad Lamraoui, Joseph Fitoussi AND Abbas Tcharkhtchi},
editor = {10 th International Conference on Residual Stresses, Sydney, Australia},
year = {2016},
date = {2016-07-01},
booktitle = {ICRS-10},
abstract = {The current paper presents an experimental study of the residual stress role to recover polymer blend to its original position after deformation. A mixture of 40% PolyCaproLactone (PCL) and 60% Styrene-Butadiene-Styrene (SBS) is used for our study. The Shape Memory Polymer (SMP) is able to storing a permanent macroscopic after passing through a temporary one; then under an external stimulus; they can recover their initial shapes. The recovery rate depends not only on the mechanical property of the mixture, but also the number of the loading cycles. Indeed, one multiplying the number of mechanical loading cycle; generally tensile test; the recovery rate does not change in a linear manner and therefore the residual stress is not added in integer from one cycle to another.
In this work we studied the mechanism of the shape as well as properties memory effect of the blend under study during a shape memory cycle, to establish a relationship between the “shape memory effect” and the “properties memory effect”. Finally, we measure the “Driving Force” responsible for the shape memory effect by an original method. This study allows establishing a relationship between the rate of recovery and residual stresses introduced into the polymer during its deformation.
},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
The current paper presents an experimental study of the residual stress role to recover polymer blend to its original position after deformation. A mixture of 40% PolyCaproLactone (PCL) and 60% Styrene-Butadiene-Styrene (SBS) is used for our study. The Shape Memory Polymer (SMP) is able to storing a permanent macroscopic after passing through a temporary one; then under an external stimulus; they can recover their initial shapes. The recovery rate depends not only on the mechanical property of the mixture, but also the number of the loading cycles. Indeed, one multiplying the number of mechanical loading cycle; generally tensile test; the recovery rate does not change in a linear manner and therefore the residual stress is not added in integer from one cycle to another.
In this work we studied the mechanism of the shape as well as properties memory effect of the blend under study during a shape memory cycle, to establish a relationship between the “shape memory effect” and the “properties memory effect”. Finally, we measure the “Driving Force” responsible for the shape memory effect by an original method. This study allows establishing a relationship between the rate of recovery and residual stresses introduced into the polymer during its deformation.
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Noura Hadjkacem; Achraf Kallel; Nader Haddar; Riadh Elleuch Modelling and analysis of a deep-drawing operation 5500 - 5599 Conférence 6th International Conference on Advances in Mechanical Engineering and Mechanics ,Hammamet, Tunisia, 22 décembre, 2015. Résumé | BibTeX @conference{ICAMEM2015,
title = {Modelling and analysis of a deep-drawing operation},
author = {Noura Hadjkacem and Achraf Kallel and Nader Haddar and Riadh Elleuch},
year = {2015},
date = {2015-12-22},
booktitle = {6th International Conference on Advances in Mechanical Engineering and Mechanics ,Hammamet, Tunisia, 22 décembre},
abstract = {During the last decade, the simulation of the deep drawing process has gained a large popularity in the literature to overcome the potential problems on the parts such strain localization, excessive thinning and necking.
In this paper, a Finite Element (FE) model was developed for the 3-D numerical simulation of sheet metal deep drawing process by using ABAQUS/EXPLICIT code. This study was conducted in order to give guidance to process designers to avoid the occurrence of defects during the production of an automotive shock absorber cup (Fig.1) made of mild steel DD13 and manufactured through multi-stage working steps.
The process capability has some drawbacks due to the high strain localization. This can be justified by the limited formability of the sheet steel and the severity of the drawing operation. To overcome this inappropriate tooling condition, it will be advantageous to perform a preliminary step less severe than the drawing one.
},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
During the last decade, the simulation of the deep drawing process has gained a large popularity in the literature to overcome the potential problems on the parts such strain localization, excessive thinning and necking.
In this paper, a Finite Element (FE) model was developed for the 3-D numerical simulation of sheet metal deep drawing process by using ABAQUS/EXPLICIT code. This study was conducted in order to give guidance to process designers to avoid the occurrence of defects during the production of an automotive shock absorber cup (Fig.1) made of mild steel DD13 and manufactured through multi-stage working steps.
The process capability has some drawbacks due to the high strain localization. This can be justified by the limited formability of the sheet steel and the severity of the drawing operation. To overcome this inappropriate tooling condition, it will be advantageous to perform a preliminary step less severe than the drawing one.
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Bassem Benlazreg; Achraf Kallel; Alexis Massol Optimized design for 3D printing 5500 - 5599 Conférence The 8th European Altair Technology Conference, ATC2015, October1, Paris, France, 2015. BibTeX @conference{ATC2015,
title = {Optimized design for 3D printing},
author = {Bassem Benlazreg and Achraf Kallel and Alexis Massol},
year = {2015},
date = {2015-10-01},
booktitle = {The 8th European Altair Technology Conference, ATC2015, October1, Paris, France},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
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Achraf Kallel; Salim Bouabdallah; Jean-Marc Roelandt A review of different formulations for mortar contact constraint enforcement 5500 - 5599 Conférence 4° Congrès Algérien de Mécanique, Mascara, 2013. BibTeX @conference{Bouabdallah2013,
title = {A review of different formulations for mortar contact constraint enforcement},
author = { Achraf Kallel and Salim Bouabdallah and Jean-Marc Roelandt},
year = {2013},
date = {2013-11-25},
publisher = {4° Congrès Algérien de Mécanique, Mascara},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
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Achraf Kallel; Salim Bouabdallah; Jean-Marc Roelandt A mortar algorithm for finite deformation contact problem 5500 - 5599 Conférence 21° Congrès Français de Mécanique, Bordeaux, 26 – 30 Août 2013, 2013. BibTeX @conference{Bouabdallah2013bb,
title = {A mortar algorithm for finite deformation contact problem},
author = { Achraf Kallel and Salim Bouabdallah and Jean-Marc Roelandt},
year = {2013},
date = {2013-08-26},
publisher = {21° Congrès Français de Mécanique, Bordeaux, 26 – 30 Août 2013},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
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Achraf Kallel; Salim Bouabdallah; Jean-Marc Roelandt A simple scheme for two dimensional mortar frictional contact problems 5500 - 5599 Conférence 3rd International Conference on Computational Contact Mechanics, Lecce, 10-12 July 2013, 2013. BibTeX @conference{Bouabdallah2013bb,
title = {A simple scheme for two dimensional mortar frictional contact problems},
author = { Achraf Kallel and Salim Bouabdallah and Jean-Marc Roelandt},
year = {2013},
date = {2013-07-10},
publisher = {3rd International Conference on Computational Contact Mechanics, Lecce, 10-12 July 2013},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
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