Mixed-mode quasi-static failure criteria for adhesively-bonded pultruded GFRP joints |
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| Affiliation: | 1. Department of Neurology, Henry Ford Hospital, Detroit, MI, USA;2. Department of Physics, Oakland University, Rochester, MI, USA;1. Constructed Facilities Center, Department of Civil and Environmental Engineering, West Virginia University, P.O. Box 6103, Morgantown, WV 26506-6103, USA;2. School of Engineering and Engineering Technology, LeTourneau University, P.O. Box 7001, Longview, TX 75607-7001, USA;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. Faculdade de Ciências Económicas, Sociais e da Empresa, Universidade Lusófona do Porto, Rua Augusto Rosa, 24, 4000-098 Porto, Portugal;3. Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal;4. INEGI—Instituto de Engenharia Mecânica e Gestão Industrial, Rua Dr. Roberto Frias, 400, 4200-465 Porto, Portugal;1. Department of Civil Engineering and Architecture, University of Pavia, via Ferrata 3, 27100 Pavia, Italy;2. Laboratoire de Mécanique des Solides, Ecole Polytecnique, CNRS, Université Paris-Saclay, 91128 Palaiseau, France;3. Laboratoire Navier, UMR 8205, Ecole des Ponts, IFSTTAR, CNRS, UPE, Champs-sur-Marne, France;1. University of Palermo, Department of Civil, Environmental, Aerospace, Materials Engineering, Viale delle Scienze, 90128 Palermo, Italy;2. School of Mechanical and Aerospace Engineering – Queen’s University Belfast, Ashby Building, Stranmillis Road, Belfast BT9 5AH, United Kingdom;1. CERIS, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal;2. IDMEC, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal |
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| Abstract: | The strain energy release rates of adhesively-bonded pultruded GFRP joints were determined experimentally. The crack propagated in the adherend along paths outside the symmetry plane accompanied by fiber bridging. A new method, designated the “extended global method”, was introduced to facilitate mode partitioning in the mixed-mode experiments. Non-linear finite element models were developed in order to quantify the effect of the observed fiber bridging on crack propagation. An exponential traction-separation cohesive law was used to model the fiber bridging zone and calculate the energy release rate due to the fiber bridging, while the virtual crack closure technique was used for calculation of the fracture components at the crack tip. Experimental, analytical and numerical analyses were used to establish quasi-static mixed-mode failure criteria for crack initiation and propagation. The derived mixed-mode failure criteria can be used for simulating progressive crack propagation in other joint configurations comprising the same adhesive and adherends. |
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| Keywords: | B: Fracture toughness C: Analytical modeling C: Finite element analysis (FEA) E: Pultrusion |
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