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An energy-based concept for yielding of multidirectional FRP composite structures using a mesoscale lamina damage model


Koloor, Seyed Saeid Rahimian and Karimzadeh, Atefeh and Yidris, Noorfaizal and Petrů, Michal and Ayatollahi, Majid Reza and Tamin, Mohd Nasir (2020) An energy-based concept for yielding of multidirectional FRP composite structures using a mesoscale lamina damage model. Polymers, 12 (1). art. no. 157. pp. 1-18. ISSN 2073-4360


Composite structures are made of multidirectional (MD) fiber-reinforced polymer (FRP) composite laminates, which fail due to multiple damages in matrix, interface, and fiber constituents at different scales. The yield point of a unidirectional FRP composite is assumed as the lamina strength limit representing the damage initiation phenomena, while yielding of MD composites in structural applications are not quantified due to the complexity of the sequence of damage evolutions in different laminas dependent on their angle and specification. This paper proposes a new method to identify the yield point of MD composite structures based on the evolution of the damage dissipation energy (DDE). Such a characteristic evolution curve is computed using a validated finite element model with a mesoscale damage-based constitutive model that accounts for different matrix and fiber failure modes in angle lamina. The yield point of composite structures is identified to correspond to a 5% increase in the initial slope of the DDE evolution curve. The yield points of three antisymmetric MD FRP composite structures under flexural loading conditions are established based on Hashin unidirectional (UD) criteria and the energy-based criterion. It is shown that the new energy concept provides a significantly larger safe limit of yield for MD composite structures compared to UD criteria, in which the accumulation of energy dissipated due to all damage modes is less than 5% of the fracture energy required for the structural rupture.

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Official URL or Download Paper: https://www.mdpi.com/2073-4360/12/1/157

Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
DOI Number: https://doi.org/10.3390/polym12010157
Publisher: MDPI
Keywords: Composite structures; Multidirectional FRP composite laminates; Composite yielding; Damage dissipation energy; Continuum damage model; Finite element simulation
Depositing User: Nabilah Mustapa
Date Deposited: 03 May 2020 23:03
Last Modified: 03 May 2020 23:03
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.3390/polym12010157
URI: http://psasir.upm.edu.my/id/eprint/38180
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