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    Transverse Fracture Behavior of Pultruded GFRP Materials in Tension: Effect of Fiber Layup

    Source: Journal of Composites for Construction:;2020:;Volume ( 024 ):;issue: 004
    Author:
    Lourenço Almeida-Fernandes
    ,
    João R. Correia
    ,
    Nuno Silvestre
    DOI: 10.1061/(ASCE)CC.1943-5614.0001024
    Publisher: ASCE
    Abstract: This paper presents an experimental study about the transverse tensile fracture properties of several off-the-shelf pultruded glass fiber-reinforced polymer (GFRP) materials, with different fiber layups and geometries and significant variations of elastic and strength properties. Determining these fracture properties should enable more-accurate advanced numerical simulation of the failure behavior of pultruded GFRP materials and members used in civil engineering applications, namely in the analysis of structural connections or members subjected to concentrated loads (web-crippling phenomenon). For the different GFRP materials, based on compact tension (CT) and wide compact tension (WCT) tests, both the critical energy release rate (Gc) and the cohesive law were determined at the laminate level, applying the following four data reduction methods: standardized analytical expressions, J-integral, Compliance Calibration (CC), and Modified Compliance Calibration (MCC). The CT tests were unsuccessful in reaching a stable propagation stage and provided overestimations of Gc. Conversely, the WCT tests were able to achieve a stable propagation stage and thus provided more-consistent estimates of Gc and cohesive laws. Among the various data reduction methods, a good agreement was found between visually based methods. On the contrary, the MCC method was found to provide significantly lower estimates of Gc when compared with the remainder. Different reasons for this variation are identified and discussed. The sample of GFRP materials presented a significant variation of Gc, which was found to be highly dependent on the fiber architecture: (i) for the material with weaker transverse reinforcement layers, consisting only of continuous filament mats, Gc ranged between 6.6 and 10.7 N/mm; (ii) materials presenting cross-ply layers presented intermediate Gc values, ranging from 13.1 and 21.3 N/mm; and (iii) materials comprising quasi-isotropic layups presented the highest overall Gc estimates, ranging from 19.3 N/mm (similar to cross-ply materials) to above 150 N/mm.
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      Transverse Fracture Behavior of Pultruded GFRP Materials in Tension: Effect of Fiber Layup

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4266602
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    contributor authorLourenço Almeida-Fernandes
    contributor authorJoão R. Correia
    contributor authorNuno Silvestre
    date accessioned2022-01-30T20:09:07Z
    date available2022-01-30T20:09:07Z
    date issued2020
    identifier other%28ASCE%29CC.1943-5614.0001024.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4266602
    description abstractThis paper presents an experimental study about the transverse tensile fracture properties of several off-the-shelf pultruded glass fiber-reinforced polymer (GFRP) materials, with different fiber layups and geometries and significant variations of elastic and strength properties. Determining these fracture properties should enable more-accurate advanced numerical simulation of the failure behavior of pultruded GFRP materials and members used in civil engineering applications, namely in the analysis of structural connections or members subjected to concentrated loads (web-crippling phenomenon). For the different GFRP materials, based on compact tension (CT) and wide compact tension (WCT) tests, both the critical energy release rate (Gc) and the cohesive law were determined at the laminate level, applying the following four data reduction methods: standardized analytical expressions, J-integral, Compliance Calibration (CC), and Modified Compliance Calibration (MCC). The CT tests were unsuccessful in reaching a stable propagation stage and provided overestimations of Gc. Conversely, the WCT tests were able to achieve a stable propagation stage and thus provided more-consistent estimates of Gc and cohesive laws. Among the various data reduction methods, a good agreement was found between visually based methods. On the contrary, the MCC method was found to provide significantly lower estimates of Gc when compared with the remainder. Different reasons for this variation are identified and discussed. The sample of GFRP materials presented a significant variation of Gc, which was found to be highly dependent on the fiber architecture: (i) for the material with weaker transverse reinforcement layers, consisting only of continuous filament mats, Gc ranged between 6.6 and 10.7 N/mm; (ii) materials presenting cross-ply layers presented intermediate Gc values, ranging from 13.1 and 21.3 N/mm; and (iii) materials comprising quasi-isotropic layups presented the highest overall Gc estimates, ranging from 19.3 N/mm (similar to cross-ply materials) to above 150 N/mm.
    publisherASCE
    titleTransverse Fracture Behavior of Pultruded GFRP Materials in Tension: Effect of Fiber Layup
    typeJournal Paper
    journal volume24
    journal issue4
    journal titleJournal of Composites for Construction
    identifier doi10.1061/(ASCE)CC.1943-5614.0001024
    page04020019
    treeJournal of Composites for Construction:;2020:;Volume ( 024 ):;issue: 004
    contenttypeFulltext
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