Temperature effects on Kevlar/hybrid and carbon fiber composite sandwiches under impact loading

Salehi‐Khojin, Amin; Mahinfalah, M.; Bashirzadeh, Reza; Freeman, Brian

doi:10.1016/j.compstruct.2005.09.005

Cited by 77 publications

(46 citation statements)

References 4 publications

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“…These parameters are important because they indicate how much moment load is transferred to the rest of the structure and how much transverse deflection is generated during impact. In a study done by Salehi-Khojin et al these parameters were generated for a clamped edge (cantilevered) circular plate composite [13]. A high AEMP ratio indicates a low amount of load transfer to the supports compared to impact energy.…”

Section: Crash Performance Non-dimensional Parametersmentioning

confidence: 99%

“…The following expressions are non-dimensional parameters introduced to evaluate the crash performance of a cantilevered circular plate [12,13]. Several trends were observed as temperature and energy varied for the non-dimensional parameter AEMP.…”

Section: Crash Performance Non-dimensional Parametersmentioning

confidence: 99%

“…Face sheet maximum stress, maximum energy absorption, and compression after impact strength, AEMP, and PI, were all considered in this study. These impact mechanical properties were found by modeling the test specimen as a circular clamped edge plate, identical to work done by Salehi-Kojin et al [13]. Each of these characterizing impact properties was used in this study to evaluate low velocity impact performance of the composites over the variable temperature range.…”

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confidence: 98%

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Temperature Effects on the Impact Behavior of Fiberglass and Fiberglass/Kevlar Sandwich Composites

et al. 2006

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Impact tests were performed on sandwich composites with Fiberglass and Fiberglass/Kevlar face sheets subjected to varied temperatures. A number of specimens were tested at −50 to 120°C temperature range and at 20, 30, and 45 J low velocity energy levels. Impact properties of the sandwich composites that were evaluated include maximum normal and shear stresses, maximum energy absorption, non-dimensional parameters (AEMP, PI, and RD), and compression after impact strength. Composite specimens tested have a urethane foam filled honeycomb center sandwiched between a variation of four layered Fiberglass and Kevlar/Fiberglass face sheets in a thermoset polymer epoxy matrix. Results showed that the impact performance of these sandwich composites changed over the range of temperature considered and with the addition of a Kevlar layer.

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Section: Crash Performance Non-dimensional Parametersmentioning

confidence: 99%

Section: Crash Performance Non-dimensional Parametersmentioning

confidence: 99%

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confidence: 98%

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Temperature Effects on the Impact Behavior of Fiberglass and Fiberglass/Kevlar Sandwich Composites

et al. 2006

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“…The result of a research on impacted sandwich composites with Kevlar/hybrid and carbon facesheets subjected to different temperatures were presented by Salehi-Khojin et al [16]. They have found that temperature have significant effects on the impact behaviour of graphite and combinations of graphite with hybrid and Kevlar.…”

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confidence: 95%

The Effects of Thermal Cycles on the Impact Fatigue Properties of Thermoplastic Matrix Composites

et al. 2008

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The effects of thermal cycles on the impact fatigue properties of unidirectional carbon fibre reinforced polyetherimide (PEI) matrix composites were investigated. During the thermal cycles, samples were immersed into boiling water (100°C) and subsequently to ice water (0°C), 50, 200 and 500 times. The changes in viscoelastic properties of the composites were investigated by means of dynamic mechanical thermal analyzer (DMTA). At the second step, thermal cycled composites were subjected to repeated impact loadings, with different impact energies. Instrumented impact test results were presented as a function of force, energy, deformation during the experiments. The scanning electron microscope (SEM) studies were done in order to understand the morphology of fractured samples after impact fatigue loading. The number of thermal cycles and applied impact energy of the hammer are found to have a great importance on the fracture morphology of repeatedly impacted material, as expected.

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“…impact response of composite structures [2][3][4]. Hybridizing with high modulus fibres has shown improved damage tolerance to low velocity impact and increased the delamination resistance due to bending stiffness mismatch.…”

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confidence: 99%

Energy absorption and bending stiffness in CFRP laminates: The effect of 45° plies

David-West

Alexander

Nash

et al. 2008

Thin-Walled Structures

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This version is available at https://strathprints.strath.ac.uk/5657/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output. Energy Absorption and Bending Stiffness in CFRP Laminates AbstractThe impact characteristics of cross-ply and angle-ply composite laminates were investigated, with an laminates. The impact energy was kept constant at 12 J for all the tests. From the dynamic responses presented here as force history, energy history and force-displacement plots, relevant characteristics such as contact time, delamination load, absorbed energy, bending stiffness, after impact deflection etc were obtained. The plots were non-smooth, disclosing the salient features of the composites. It was important to note that the [0/45/90] 4s was more resistant to impact bending, but incurred more damage as exhibited by its higher contact time and absorbed energy. The laminates were sectioned through the impact point and magnified macro and micro photographs were taken to show the failure modes, which include delamination, matrix cracking etc.

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Temperature effects on Kevlar/hybrid and carbon fiber composite sandwiches under impact loading

Cited by 77 publications

References 4 publications

Temperature Effects on the Impact Behavior of Fiberglass and Fiberglass/Kevlar Sandwich Composites

Temperature Effects on the Impact Behavior of Fiberglass and Fiberglass/Kevlar Sandwich Composites

The Effects of Thermal Cycles on the Impact Fatigue Properties of Thermoplastic Matrix Composites

Energy absorption and bending stiffness in CFRP laminates: The effect of 45° plies

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