A Viscoelastic Constitutive Law For FRP Materials

Ascione, Luigi; Berardi, Valentino Paolo; D'Aponte, Anna

doi:10.1080/15502281003660211

Cited by 28 publications

(8 citation statements)

References 9 publications

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“…This non-contact optical technique has also allowed to evaluate the strain field with a good accuracy. The proposed test methodology can be easily extended in a near future to the analysis of long-term behavior of adhesive interface, accounting its viscous nature [34][35][36][37][38][39], against a limited computational and time burden due to the optimized use of DIC technique.…”

Section: Discussionmentioning

confidence: 99%

Cohesive fracture in composite systems: experimental setup and first results

Berardi¹,

Perrella²,

Cricrı̀³

2019

Frattura Ed Integrità Strutturale

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Composite systems are widely used in many engineering applications for new structures and strengthening of existing ones. Within the structural rehabilitation of civil constructions, the plating technique of beams with Fiber Reinforced Polymer (FRP) represents a quick and optimal intervention with respect to traditional ones. The failure of these composite systems usually occurs due to the FRP debonding, which corresponds to a mode II fracture of concrete specimens. In this paper, a new experimental setup for investigating the mode II fracture behavior of FRP-concrete composite structures is presented. The test equipment consists of both conventional equipment and a non-contact optical technique, Digital Image Correlation (DIC), and the test system was realized at the Design Machine Laboratory of the University of Salerno. A preliminary test was performed and the corresponding results are shown and discussed.

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Section: Discussionmentioning

confidence: 99%

Cohesive fracture in composite systems: experimental setup and first results

Berardi¹,

Perrella²,

Cricrı̀³

2019

Frattura Ed Integrità Strutturale

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“…The time-temperature dependent behavior of conventional FRPs has been studied utilizing different constitutive models that were originally designed for polymers [29][30][31][32][33]. Creep tests require prolonged testing time as the rate of change can be very slow (in some cases several years).…”

Section: Introductionmentioning

confidence: 99%

Viscoplastic characterization and modeling of hybrid carbon fiber/carbon nanotubes reinforced composites

Skandani

Al-Haik

2016

Composites Part B: Engineering

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This investigation illuminates the effect of surface grown carbon nanotubes (CNTs) on the viscoplastic behavior of fiber reinforced plastics (FRPs). The study demonstrates the feasibility of growing CNTs on conventional woven carbon fibers without degrading the fibers structural properties. The subsequent hierarchal reinforcement was utilized to fabricate laminated FRPs. The viscoplastic behaviors of the hybrid composites were investigated through series of stress relaxation and creep tests at different thermomechanical environments. The results of the experimental tests were utilized to both construct and validate a phenomenological viscoplastic constitutive model of the hybrid FRPs. The experiments and the model predictions established that surface grown CNTs could enhance the composite resistance to viscoplastic deformation.

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“…The time–temperature‐dependent behavior of conventional FRPs has been depicted utilizing different constitutive models that were originally designed for polymers . Creep tests require prolonged testing time as the rate of change can be very slow (in some cases several years).…”

Section: Introductionmentioning

confidence: 99%

Viscoelastic behavior of epoxy/carbon fiber/Zno nano-rods hybrid composites

et al. 2014

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The insufficient viscoelastic resistance of fiber reinforced plastics can be retrofitted by the addition of more rigid nano fillers to the polymer matrix. In this study, carbon fibers plies were grafted with zinc oxide (ZnO) nano‐rods and the hybridized reinforcement was utilized in laminated composites. Flexural creep tests were carried out using dynamic mechanical analysis (DMA) and the time/temperature superposition principle was employed for accelerated testing. To verify the applicability of TTPS, prolonged stress relaxation tests were also carried out in flexural mode. Data from the DMA flexural creep tests revealed that the whiskerization of carbon fibers with ZnO nano rods reduced the creep compliance by 23% at elevated temperatures and prolonged durations. Also, the relaxation data confirmed the applicability of TTPS to these hybrid composites. The stress relaxation modulus improved by 65% in comparison to composites based on neat carbon fibers. POLYM. COMPOS., 36:1967–1972, 2015. © 2014 Society of Plastics Engineer

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A Viscoelastic Constitutive Law For FRP Materials

Cited by 28 publications

References 9 publications

Cohesive fracture in composite systems: experimental setup and first results

Cohesive fracture in composite systems: experimental setup and first results

Viscoplastic characterization and modeling of hybrid carbon fiber/carbon nanotubes reinforced composites

Viscoelastic behavior of epoxy/carbon fiber/Zno nano-rods hybrid composites

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