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Open AccessArticle

Linear-Nonlinear Stiffness Responses of Carbon Fiber-Reinforced Polymer Composite Materials and Structures: A Numerical Study

1
Department of Aerospace Engineering, Universiti Putra Malaysia, UPM Serdang 43400, Selangor Darul Ehsan, Malaysia
2
Institute for Nanomaterials, Advanced Technologies and Innovation (CXI), Technical University of Liberec (TUL), Studentska 2, 461 17 Liberec, Czech Republic
3
School of Mechanical Engineering, Universiti Teknologi Malaysia, Johor Bahru 81310, Malaysia
4
Department of Mechanical Engineering, Universiti Putra Malaysia, UPM Serdang 43400, Selangor Darul Ehsan, Malaysia
*
Author to whom correspondence should be addressed.
Academic Editor: Ilaria Armentano
Polymers 2021, 13(3), 344; https://doi.org/10.3390/polym13030344
Received: 4 January 2021 / Revised: 13 January 2021 / Accepted: 15 January 2021 / Published: 22 January 2021
(This article belongs to the Special Issue Damage Mechanics of Polymer Composites)
The stiffness response or load-deformation/displacement behavior is the most important mechanical behavior that frequently being utilized for validation of the mathematical-physical models representing the mechanical behavior of solid objects in numerical method, compared to actual experimental data. This numerical study aims to investigate the linear-nonlinear stiffness behavior of carbon fiber-reinforced polymer (CFRP) composites at material and structural levels, and its dependency to the sets of individual/group elastic and damage model parameters. In this regard, a validated constitutive damage model, elastic-damage properties as reference data, and simulation process, that account for elastic, yielding, and damage evolution, are considered in the finite element model development process. The linear-nonlinear stiffness responses of four cases are examined, including a unidirectional CFRP composite laminate (material level) under tensile load, and also three multidirectional composite structures under flexural loads. The result indicated a direct dependency of the stiffness response at the material level to the elastic properties. However, the stiffness behavior of the composite structures depends both on the structural configuration, geometry, lay-ups as well as the mechanical properties of the CFRP composite. The value of maximum reaction force and displacement of the composite structures, as well as the nonlinear response of the structures are highly dependent not only to the mechanical properties, but also to the geometry and the configuration of the structures. View Full-Text
Keywords: CFRP composites; material behavior; structural analysis; stiffness response; damage mechanics; finite element method CFRP composites; material behavior; structural analysis; stiffness response; damage mechanics; finite element method
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MDPI and ACS Style

R. Koloor, S.S.; Karimzadeh, A.; Abdullah, M.R.; Petrů, M.; Yidris, N.; Sapuan, S.M.; Tamin, M.N. Linear-Nonlinear Stiffness Responses of Carbon Fiber-Reinforced Polymer Composite Materials and Structures: A Numerical Study. Polymers 2021, 13, 344. https://doi.org/10.3390/polym13030344

AMA Style

R. Koloor SS, Karimzadeh A, Abdullah MR, Petrů M, Yidris N, Sapuan SM, Tamin MN. Linear-Nonlinear Stiffness Responses of Carbon Fiber-Reinforced Polymer Composite Materials and Structures: A Numerical Study. Polymers. 2021; 13(3):344. https://doi.org/10.3390/polym13030344

Chicago/Turabian Style

R. Koloor, S. S.; Karimzadeh, A.; Abdullah, M. R.; Petrů, M.; Yidris, N.; Sapuan, S. M.; Tamin, M. N. 2021. "Linear-Nonlinear Stiffness Responses of Carbon Fiber-Reinforced Polymer Composite Materials and Structures: A Numerical Study" Polymers 13, no. 3: 344. https://doi.org/10.3390/polym13030344

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