Failure analysis of AA8011-pultruded GFRP adhesively bonded similar and dissimilar joints |
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| Affiliation: | 1. Birla Institute of Technology and Science-Pilani, Hyderabad Campus, India;2. Indian Institute of Information Technology, Design and Manufacturing, Chennai, India;1. Institute of Mechanical Engineering (IDMEC), Faculty of Engineering, University of Porto, Portugal;2. Department of Mechanical Engineering, Faculty of Engineering, University of Porto, Portugal;3. Department of Materials, Loughborough University, Loughborough, Leicestershire LE11 3TU, UK;1. School of Mechatronic Engineering, Universiti Malaysia Perlis, Pauh Putra Campus, 02600 Arau, Perlis, Malaysia;2. Faculty of Engineering Technology, Universiti Malaysia Perlis, UniCITI Campus, Padang Besar, Perlis, Malaysia;3. Laboratory of Biocomposite Technology, Institute of Tropical Forestry and Forest Products (INTROP), Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;4. Department of Aerospace Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia;5. Aerospace Malaysia Innovation Centre (944751-A), Prime Minister''s Department, MIGHT Partnership Hub, Jalan Impact, 63000 Cyberjaya, Selangor Darul Ehsan, Malaysia;1. Department of Emerging Technologies & Concepts, Airbus Group, Spain;2. Department of Continuum Mechanics and Structural Analysis, University Carlos III of Madrid, Av. de la Universidad, 30, 28911 Leganes, Spain;1. MOE Key Laboratory of Disaster Forecast and Control in Engineering, Institute of Applied Mechanics, Jinan University, Guangzhou, 510632, China;2. Department of Ocean Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China |
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| Abstract: | In this work, a comparative failure analysis of aluminum (AA8011/AA8011) and glass fiber reinforced polyester (GFRP/GFRP) based similar and dissimilar joints is presented. The GFRP is prepared using pultrusion technique. Single lap joints are prepared by using Araldite R2011 epoxy as an adhesive. The lap joints are then tested under tension to estimate the average shear strength of the assembly. It is observed that the average bond strength of AA8011/AA8011 is lesser than that of the GFRP/GFRP joint. The failure of similar joints occurred by fracture within the adhesive. The dissimilar joint is failed predominantly by interface debonding. Further, a detailed three dimensional stress analysis of the joints is carried out using finite element method (FEM). The damage analysis of adhesive layer is carried out by coupling FEM with cohesive zone model (CZM). The stress, damage distributions and failure mechanisms are compared for similar joints in detail. A failure mechanism is proposed for AA8011/AA8011 type joint that favours a rapid crack growth in the adhesive after crack initiation, which is responsible for lesser bond strength. The increase in overlap length has positive effect that the peak load increases proportionally with overlap length. |
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| Keywords: | Adherent plasticity Cohesive Zone Model Failure Mechanism Joints Adhesive |
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