The Experts below are selected from a list of 4023 Experts worldwide ranked by ideXlab platform
W J Cantwell - One of the best experts on this subject based on the ideXlab platform.
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the influence of Core density on the blast resistance of foam based sandwich structures
International Journal of Impact Engineering, 2012Co-Authors: Mohamad Zaki Hassan, Zhongwei Guan, W J CantwellAbstract:Abstract This paper investigates the influence of varying Core density on the blast resistance of sandwich panels based on crosslinked PVC Cores and aluminium alloy skins. Initially, the findings of a series of compression and single edge notch bend and shear tests are presented in order to characterise the strength and toughness characteristics of the foams and generate data for input into the finite element models. Experimental blast tests employing a ballistic pendulum are then reported, where it is shown that damage within the sandwich panels becomes more severe as the density of the foam Core is increased. Indeed, panels based on the lowest density foam (60 kg/m3) did not exhibit any fracture or debonding over the range of impulses considered, instead absorbing energy through plastic deformation in the metal skins and compression of the foam Core. In contrast, significant damage, in the form of Mode I Core Cracking and debonding at the skin–Core interface, was apparent in the higher density Core systems. A finite element analysis has been employed to model the blast response of the sandwich structures. The FE models successfully predicted the post-test deformed shapes of the panels. These analyses were also used to determine the individual contributions of the skin and Core to the energy-absorbing capacity of the various sandwich structures. Here, it was shown that the foam Core absorbs more than fifty percent of the overall energy dissipated during the test.
Mohamad Zaki Hassan - One of the best experts on this subject based on the ideXlab platform.
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the influence of Core density on the blast resistance of foam based sandwich structures
International Journal of Impact Engineering, 2012Co-Authors: Mohamad Zaki Hassan, Zhongwei Guan, W J CantwellAbstract:Abstract This paper investigates the influence of varying Core density on the blast resistance of sandwich panels based on crosslinked PVC Cores and aluminium alloy skins. Initially, the findings of a series of compression and single edge notch bend and shear tests are presented in order to characterise the strength and toughness characteristics of the foams and generate data for input into the finite element models. Experimental blast tests employing a ballistic pendulum are then reported, where it is shown that damage within the sandwich panels becomes more severe as the density of the foam Core is increased. Indeed, panels based on the lowest density foam (60 kg/m3) did not exhibit any fracture or debonding over the range of impulses considered, instead absorbing energy through plastic deformation in the metal skins and compression of the foam Core. In contrast, significant damage, in the form of Mode I Core Cracking and debonding at the skin–Core interface, was apparent in the higher density Core systems. A finite element analysis has been employed to model the blast response of the sandwich structures. The FE models successfully predicted the post-test deformed shapes of the panels. These analyses were also used to determine the individual contributions of the skin and Core to the energy-absorbing capacity of the various sandwich structures. Here, it was shown that the foam Core absorbs more than fifty percent of the overall energy dissipated during the test.
Shankar Kalyanasundaram - One of the best experts on this subject based on the ideXlab platform.
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the effect of Core thickness on the flexural behaviour of aluminium foam sandwich structures
Composite Structures, 2007Co-Authors: Millicent Styles, Paul Compston, Shankar KalyanasundaramAbstract:The effect of Core thickness on the deformation mechanism of an aluminium foam Core/thermoplastic composite facing sandwich structure under 4-point bending was investigated. Full field strain analysis and visual observations show a number of failure mechanisms between the different Core thicknesses. High strain concentrations were observed in each sample thickness corresponding to the particular region of failure. The thinner samples exhibited skin wrinkling and fracture, and some Core Cracking and crushing while the thicker samples failed due to Core indentation. Increasing the skin thickness eliminated the incidence of Core indentation. Instead, significant Core shear Cracking was observed.
Zhongwei Guan - One of the best experts on this subject based on the ideXlab platform.
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the influence of Core density on the blast resistance of foam based sandwich structures
International Journal of Impact Engineering, 2012Co-Authors: Mohamad Zaki Hassan, Zhongwei Guan, W J CantwellAbstract:Abstract This paper investigates the influence of varying Core density on the blast resistance of sandwich panels based on crosslinked PVC Cores and aluminium alloy skins. Initially, the findings of a series of compression and single edge notch bend and shear tests are presented in order to characterise the strength and toughness characteristics of the foams and generate data for input into the finite element models. Experimental blast tests employing a ballistic pendulum are then reported, where it is shown that damage within the sandwich panels becomes more severe as the density of the foam Core is increased. Indeed, panels based on the lowest density foam (60 kg/m3) did not exhibit any fracture or debonding over the range of impulses considered, instead absorbing energy through plastic deformation in the metal skins and compression of the foam Core. In contrast, significant damage, in the form of Mode I Core Cracking and debonding at the skin–Core interface, was apparent in the higher density Core systems. A finite element analysis has been employed to model the blast response of the sandwich structures. The FE models successfully predicted the post-test deformed shapes of the panels. These analyses were also used to determine the individual contributions of the skin and Core to the energy-absorbing capacity of the various sandwich structures. Here, it was shown that the foam Core absorbs more than fifty percent of the overall energy dissipated during the test.
Millicent Styles - One of the best experts on this subject based on the ideXlab platform.
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the effect of Core thickness on the flexural behaviour of aluminium foam sandwich structures
Composite Structures, 2007Co-Authors: Millicent Styles, Paul Compston, Shankar KalyanasundaramAbstract:The effect of Core thickness on the deformation mechanism of an aluminium foam Core/thermoplastic composite facing sandwich structure under 4-point bending was investigated. Full field strain analysis and visual observations show a number of failure mechanisms between the different Core thicknesses. High strain concentrations were observed in each sample thickness corresponding to the particular region of failure. The thinner samples exhibited skin wrinkling and fracture, and some Core Cracking and crushing while the thicker samples failed due to Core indentation. Increasing the skin thickness eliminated the incidence of Core indentation. Instead, significant Core shear Cracking was observed.