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Experimental and numerical fatigue damage characterization in multidirectional thermoplastic glass/polypropylene laminates based on in-situ damage observations

Josef Sommer (UGent) , Mohammad Hajikazemi (UGent) , Ives De Baere (UGent) and Wim Van Paepegem (UGent)
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Abstract
Quantifying microscopic damage mechanisms in opaque composite laminates with multiple off-axis plies throughout fatigue experiments is challenging. However, if successful, important relations can be revealed be-tween actual evolving damages and their contribution to the mechanical laminate response. This study characterizes the evolution of matrix cracking in +/- 45 and 90 embedded off-axis plies together with effects of delamination and relates them to the global mechanical property reductions in Glass/Polypropylene laminates. [0/45/0/-45]s and [0/45/90/-45]s laminates are tested under tension-tension fatigue over 500 000 cycles at three different stress levels. In-situ edge damage detection by optical measurements are performed as well as the validation of damages by detailed post-mortem microscopy. Moreover, through-the-width sectioning is applied to reveal the damages inside the laminate after testing. Additionally, the effects of different fabrication histories on damage progression are assessed. Influences of 45-ply thickness and different ply neighbouring orientations on the damage behaviour are discussed with their contribution to the normalized stiffness degradation and Poisson's ratio evolution. Moreover, experimental results are compared with a modelling approach by which the effects of damages in multiple plies can be considered, showing very good accordance.
Keywords
Industrial and Manufacturing Engineering, Mechanical Engineering, Mechanics of Materials, Ceramics and Composites, Damage mechanics, Fatigue, Thermoplastic laminates, Compression moulding, GLASS FIBER/POLYPROPYLENE COMPOSITES, REINFORCED POLYPROPYLENE, MECHANICAL-PROPERTIES, PLY CRACKING, BEHAVIOR, STRESS, STRAIN, TEMPERATURE, RESISTANCE, FAILURE

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MLA
Sommer, Josef, et al. “Experimental and Numerical Fatigue Damage Characterization in Multidirectional Thermoplastic Glass/Polypropylene Laminates Based on in-Situ Damage Observations.” COMPOSITES PART B-ENGINEERING, vol. 267, 2023, doi:10.1016/j.compositesb.2023.111028.
APA
Sommer, J., Hajikazemi, M., De Baere, I., & Van Paepegem, W. (2023). Experimental and numerical fatigue damage characterization in multidirectional thermoplastic glass/polypropylene laminates based on in-situ damage observations. COMPOSITES PART B-ENGINEERING, 267. https://doi.org/10.1016/j.compositesb.2023.111028
Chicago author-date
Sommer, Josef, Mohammad Hajikazemi, Ives De Baere, and Wim Van Paepegem. 2023. “Experimental and Numerical Fatigue Damage Characterization in Multidirectional Thermoplastic Glass/Polypropylene Laminates Based on in-Situ Damage Observations.” COMPOSITES PART B-ENGINEERING 267. https://doi.org/10.1016/j.compositesb.2023.111028.
Chicago author-date (all authors)
Sommer, Josef, Mohammad Hajikazemi, Ives De Baere, and Wim Van Paepegem. 2023. “Experimental and Numerical Fatigue Damage Characterization in Multidirectional Thermoplastic Glass/Polypropylene Laminates Based on in-Situ Damage Observations.” COMPOSITES PART B-ENGINEERING 267. doi:10.1016/j.compositesb.2023.111028.
Vancouver
1.
Sommer J, Hajikazemi M, De Baere I, Van Paepegem W. Experimental and numerical fatigue damage characterization in multidirectional thermoplastic glass/polypropylene laminates based on in-situ damage observations. COMPOSITES PART B-ENGINEERING. 2023;267.
IEEE
[1]
J. Sommer, M. Hajikazemi, I. De Baere, and W. Van Paepegem, “Experimental and numerical fatigue damage characterization in multidirectional thermoplastic glass/polypropylene laminates based on in-situ damage observations,” COMPOSITES PART B-ENGINEERING, vol. 267, 2023.
@article{01HFV0WE748MXZX9KHCJ0KHQB3,
  abstract     = {{Quantifying microscopic damage mechanisms in opaque composite laminates with multiple off-axis plies throughout fatigue experiments is challenging. However, if successful, important relations can be revealed be-tween actual evolving damages and their contribution to the mechanical laminate response. This study characterizes the evolution of matrix cracking in +/- 45 and 90 embedded off-axis plies together with effects of delamination and relates them to the global mechanical property reductions in Glass/Polypropylene laminates. [0/45/0/-45]s and [0/45/90/-45]s laminates are tested under tension-tension fatigue over 500 000 cycles at three different stress levels. In-situ edge damage detection by optical measurements are performed as well as the validation of damages by detailed post-mortem microscopy. Moreover, through-the-width sectioning is applied to reveal the damages inside the laminate after testing. Additionally, the effects of different fabrication histories on damage progression are assessed. Influences of 45-ply thickness and different ply neighbouring orientations on the damage behaviour are discussed with their contribution to the normalized stiffness degradation and Poisson's ratio evolution. Moreover, experimental results are compared with a modelling approach by which the effects of damages in multiple plies can be considered, showing very good accordance.}},
  articleno    = {{111028}},
  author       = {{Sommer, Josef and Hajikazemi, Mohammad and De Baere, Ives and Van Paepegem, Wim}},
  issn         = {{1359-8368}},
  journal      = {{COMPOSITES PART B-ENGINEERING}},
  keywords     = {{Industrial and Manufacturing Engineering,Mechanical Engineering,Mechanics of Materials,Ceramics and Composites,Damage mechanics,Fatigue,Thermoplastic laminates,Compression moulding,GLASS FIBER/POLYPROPYLENE COMPOSITES,REINFORCED POLYPROPYLENE,MECHANICAL-PROPERTIES,PLY CRACKING,BEHAVIOR,STRESS,STRAIN,TEMPERATURE,RESISTANCE,FAILURE}},
  language     = {{eng}},
  pages        = {{17}},
  title        = {{Experimental and numerical fatigue damage characterization in multidirectional thermoplastic glass/polypropylene laminates based on in-situ damage observations}},
  url          = {{http://doi.org/10.1016/j.compositesb.2023.111028}},
  volume       = {{267}},
  year         = {{2023}},
}

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