An experimental method dedicated to the dynamic characterization of structural adhesives under drop weight conditions |
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| Affiliation: | 1. Université de Toulouse, Institut Clément Ader (ICA), UMR CNRS 5312, UPS/INSA/ISAE/Mines Albi, 3 rue Caroline Aigle, F-31400 Toulouse, France;2. ENSTA Bretagne, Institut de Recherche Dupuy de Lôme (IRDL), UMR CNRS 6027, 29806 Brest, France;3. Université de Bretagne Occidentale, Institut de Recherche Dupuy de L''ôme (IRDL), UMR CNRS 6027, 29200 Brest, France;1. Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal;2. INEGI – Pólo FEUP, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal;1. Karlsruhe Institute of Technology (KIT), Research Center for Steel, Timber and Masonry, Karlsruhe, Germany;2. Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Bremen, Germany;1. Fraunhofer Institute for High-Speed Dynamics, Ernst-Mach-Institut, EMI, Eckerstr. 4, 79104 Freiburg, Germany;2. JSOL Corporation, 2-5-24, Harumi, Chuo ward, Tokyo, Japan;1. Fraunhofer Institute for Manufacturing Technology and Advanced Materials (IFAM), Wiener Straße 12, D-28359 Bremen, Germany;2. University of Bremen, Department Biology/Chemistry, Leobener Straße 3, D-28359 Bremen, Germany;3. Synthopol Chemie, Dr. rer. pol. Koch GmbH & Co. KG, Alter Postweg 35, D-21614 Buxtehude, Germany |
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| Abstract: | Adhesive bonding is a commonly used method in multi-materials assemblies dedicated to the transport fields. In order to ensure structures integrity and users safety, the knowledge of the mechanical behaviour of structural adhesives used in these assemblies under impact conditions appears to be an essential prerequisite. To date, numerous tests combining usual specimens geometry e.g. single lap joint, butt joint, etc. and high velocity testing rigs exist and are used. Among these, most allow comparative studies and a few provide a partial identification of the material properties of the investigated adhesive.In this study, an experimental method dedicated to the dynamic characterization of structural adhesives under drop weight condition is proposed. On the basis of existing works, a modified Arcan specimen and a dynamic tensile testing mean were developed and are presented. The Arcan geometry allows to test the adhesive under various loading directions and so to obtain its mechanical response envelope. Design strategies are also implemented in order to obtain time stable and quasi-homogeneous stress distributions in the adhesive during the tests.At last, the dynamic characterization of a Dow® BetamateTM 1496 V adhesive is proposed. Results are repeatable and show a strain rate dependent behaviour validating the appropriateness of the experimental approach. |
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| Keywords: | Modified Arcan device [C ] Dynamic mechanical analysis [D ] Mechanical properties of adhesives [D ] Impact |
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