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Magd Abdel Wahab - One of the best experts on this subject based on the ideXlab platform.

  • the effect of cataphoretic and powder coatings on the strength and failure modes of en aw 5754 aluminium Alloy Adhesive joints
    International Journal of Adhesion and Adhesives, 2019
    Co-Authors: Anna Rudawska, Magd Abdel Wahab
    Abstract:

    Abstract The aim of this study is to determine the effect of cataphoretic and powder coatings and also the method of application the primer on the adherends surface on the strength and failure modes of EN AW-5754 aluminium Alloy Adhesive joints. The study is performed on lap joints made of EN AW-5754 aluminium Alloy, subjected to three different types of surface treatment; namely a) polyurethane cataphoretic coating, b) powder coating based on black mat RAL 9005 UL polyester resin and c) no coating. The tested Adhesive joints were made using a one-component polyurethane Adhesive Terostat 8596, which was dedicated for automotive and cured under a constant load of 0.018 MPa at 20 ± 2 °C. In addition, this study investigates the effect of the application of Terostat 8519P adhesion promoter which is a liquid polyurethane-based primer containing solvents and which is corresponding to Terostat 8596 polyurethane Adhesive. Terostat 8519P adhesion promoter was applied in two different ways: a) to one substrate and b) to both substrates. The produced Adhesive joints were subjected to strength tests using the Zwick/Roell Z150 testing machine. The examination of fracture in the tested Adhesive joints was performed in accordance with the EN ISO 10365 standard. The shear strength results have demonstrated that both the method of application of the adhesion promoter (Terostat 8519 P) and the presence of cataphoretic coating had an influence on Adhesive joints strength. The use of the adhesion promoter significantly affects the strength of both uncoated EN AW-5754 aluminium Alloy Adhesive joints and the Adhesive joints subjected to powder coating. The use of the adhesion promoter has a less significant effect on the cataphoretic-coated samples.

Paulo Jorge Da Silva Bartolo - One of the best experts on this subject based on the ideXlab platform.

  • analysis of manufacturing parameters on the shear strength of aluminium Adhesive single lap joints
    Journal of Materials Processing Technology, 2010
    Co-Authors: Antonio Pereira, J A M Ferreira, F V Antunes, Paulo Jorge Da Silva Bartolo
    Abstract:

    Abstract An experimental and numerical investigation into the shear strength behaviour of aluminium Alloy Adhesive lap joints was carried out in order to understand the effect of geometrical and manufacturing parameters on the strength of Adhesive bonding joints, with the aim of optimizing shear strength. The adherend material used for the experimental tests was an aluminium Alloy in the form of thin sheets, and the Adhesive used was a high strength epoxy. Five surface treatments were studied. The surface treatments process using sodium dichromate–sulphuric acid etch (CSA) and abrasive polishing (AP) resulted in improved joint shear strength when compared to acetone cleaning (SW), caustic etch (CE), and Tucker's reagent etch (TR). The decrease in surface roughness was found to increase the shear strength of single-lap joints. An increase in adherend thickness and overlap length was found to increase shear strength which means that an increase in joint rigidity increases its strength. A numerical analysis was developed to explain the effect of the geometrical parameters on rotation angle, stress and strain fields, and failure load. An increase in adherend thickness and overlap length decreases the joint rotation angle, reducing the plastic strain peak and therefore increasing the failure load.

  • study on the fatigue strength of aa 6082 t6 Adhesive lap joints
    International Journal of Adhesion and Adhesives, 2009
    Co-Authors: Antonio Pereira, J A M Ferreira, F V Antunes, Paulo Jorge Da Silva Bartolo
    Abstract:

    Abstract A research study on the fatigue behaviour of aluminium Alloy Adhesive lap joints was carried out to understand the effect of surface pre-treatment and adherends thickness on the fatigue strength of Adhesive joints. The adherend material used for the experimental tests was an aluminium Alloy 6082-T6 in the form of thin sheets, and the Adhesive used was a high strength epoxy (Araldite 420 A/B). The surface preparation included an abrasive preparation (AP joints) and sodium dichromate–sulphuric acid etch (CSA joints). A maximum fatigue strength was obtained for the CSA surface treatment with a 1.0 mm adherends’ thickness. The fastest fatigue damage was related with a high surface roughness and a high stress perpendicular to Adhesive surface, which helps to promote the Adhesive failure. A numerical analysis was also performed to understand the effect of the adherends thickness on the stress level. Results showed an increase of the out-of-plane peak stresses with the increase of adherends thickness.

Abdel Wahab Magd - One of the best experts on this subject based on the ideXlab platform.

  • The effect of cataphoretic and powder coatings on the strength and failure modes of EN AW-5754 aluminium Alloy Adhesive joints
    'Elsevier BV', 2019
    Co-Authors: Rudawska Anna, Abdel Wahab Magd
    Abstract:

    The aim of this study is to determine the effect of cataphoretic and powder coatings and also the method of application the primer on the adherends surface on the strength and failure modes of EN AW-5754 aluminium Alloy Adhesive joints. The study is performed on lap joints made of EN AW-5754 aluminium Alloy, subjected to three different types of surface treatment; namely a) polyurethane cataphoretic coating, b) powder coating based on black mat RAL 9005 UL polyester resin and c) no coating. The tested Adhesive joints were made using a one component polyurethane Adhesive Terostat 8596, which was dedicated for automotive and cured under a constant load of 0.018 MPa at 20 +/- 2 degrees C. In addition, this study investigates the effect of the application of Terostat 8519P adhesion promoter which is a liquid polyurethane-based primer containing solvents and which is corresponding to Terostat 8596 polyurethane Adhesive. Terostat 8519P adhesion promoter was applied in two different ways: a) to one substrate and b) to both substrates. The produced Adhesive joints were subjected to strength tests using the Zwick/Roell Z150 testing machine. The examination of fracture in the tested Adhesive joints was performed in accordance with the EN ISO 10365 standard. The shear strength results have demonstrated that both the method of application of the adhesion promoter (Terostat 8519 P) and the presence of cataphoretic coating had an influence on Adhesive joints strength. The use of the adhesion promoter significantly affects the strength of both uncoated EN AW-5754 aluminium Alloy Adhesive joints and the Adhesive joints subjected to powder coating. The use of the adhesion promoter has a less significant effect on the cataphoretic-coated samples

Antonio Pereira - One of the best experts on this subject based on the ideXlab platform.

  • analysis of manufacturing parameters on the shear strength of aluminium Adhesive single lap joints
    Journal of Materials Processing Technology, 2010
    Co-Authors: Antonio Pereira, J A M Ferreira, F V Antunes, Paulo Jorge Da Silva Bartolo
    Abstract:

    Abstract An experimental and numerical investigation into the shear strength behaviour of aluminium Alloy Adhesive lap joints was carried out in order to understand the effect of geometrical and manufacturing parameters on the strength of Adhesive bonding joints, with the aim of optimizing shear strength. The adherend material used for the experimental tests was an aluminium Alloy in the form of thin sheets, and the Adhesive used was a high strength epoxy. Five surface treatments were studied. The surface treatments process using sodium dichromate–sulphuric acid etch (CSA) and abrasive polishing (AP) resulted in improved joint shear strength when compared to acetone cleaning (SW), caustic etch (CE), and Tucker's reagent etch (TR). The decrease in surface roughness was found to increase the shear strength of single-lap joints. An increase in adherend thickness and overlap length was found to increase shear strength which means that an increase in joint rigidity increases its strength. A numerical analysis was developed to explain the effect of the geometrical parameters on rotation angle, stress and strain fields, and failure load. An increase in adherend thickness and overlap length decreases the joint rotation angle, reducing the plastic strain peak and therefore increasing the failure load.

  • study on the fatigue strength of aa 6082 t6 Adhesive lap joints
    International Journal of Adhesion and Adhesives, 2009
    Co-Authors: Antonio Pereira, J A M Ferreira, F V Antunes, Paulo Jorge Da Silva Bartolo
    Abstract:

    Abstract A research study on the fatigue behaviour of aluminium Alloy Adhesive lap joints was carried out to understand the effect of surface pre-treatment and adherends thickness on the fatigue strength of Adhesive joints. The adherend material used for the experimental tests was an aluminium Alloy 6082-T6 in the form of thin sheets, and the Adhesive used was a high strength epoxy (Araldite 420 A/B). The surface preparation included an abrasive preparation (AP joints) and sodium dichromate–sulphuric acid etch (CSA joints). A maximum fatigue strength was obtained for the CSA surface treatment with a 1.0 mm adherends’ thickness. The fastest fatigue damage was related with a high surface roughness and a high stress perpendicular to Adhesive surface, which helps to promote the Adhesive failure. A numerical analysis was also performed to understand the effect of the adherends thickness on the stress level. Results showed an increase of the out-of-plane peak stresses with the increase of adherends thickness.

Rudawska Anna - One of the best experts on this subject based on the ideXlab platform.

  • The effect of cataphoretic and powder coatings on the strength and failure modes of EN AW-5754 aluminium Alloy Adhesive joints
    'Elsevier BV', 2019
    Co-Authors: Rudawska Anna, Abdel Wahab Magd
    Abstract:

    The aim of this study is to determine the effect of cataphoretic and powder coatings and also the method of application the primer on the adherends surface on the strength and failure modes of EN AW-5754 aluminium Alloy Adhesive joints. The study is performed on lap joints made of EN AW-5754 aluminium Alloy, subjected to three different types of surface treatment; namely a) polyurethane cataphoretic coating, b) powder coating based on black mat RAL 9005 UL polyester resin and c) no coating. The tested Adhesive joints were made using a one component polyurethane Adhesive Terostat 8596, which was dedicated for automotive and cured under a constant load of 0.018 MPa at 20 +/- 2 degrees C. In addition, this study investigates the effect of the application of Terostat 8519P adhesion promoter which is a liquid polyurethane-based primer containing solvents and which is corresponding to Terostat 8596 polyurethane Adhesive. Terostat 8519P adhesion promoter was applied in two different ways: a) to one substrate and b) to both substrates. The produced Adhesive joints were subjected to strength tests using the Zwick/Roell Z150 testing machine. The examination of fracture in the tested Adhesive joints was performed in accordance with the EN ISO 10365 standard. The shear strength results have demonstrated that both the method of application of the adhesion promoter (Terostat 8519 P) and the presence of cataphoretic coating had an influence on Adhesive joints strength. The use of the adhesion promoter significantly affects the strength of both uncoated EN AW-5754 aluminium Alloy Adhesive joints and the Adhesive joints subjected to powder coating. The use of the adhesion promoter has a less significant effect on the cataphoretic-coated samples