Low Energy Impact Damage Modes in Aluminum Foam and Polymer Foam Sandwich Structures

Compston, Paul; Styles, Millicent; Kalyanasundaram, Shankar

doi:10.1177/1099636206064824

Cited by 37 publications

(21 citation statements)

References 16 publications

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“…These tomographic images allow a better understanding of their failure mode, which is characterized by the progressive crushing of the foam cells with a more uniform distribution of the impacted load. The post-impact investigation of the specimens confirms the results of the tests conducted by Compston et al [12]; the AFS specimens experienced extensive ductile fracture with large out-of-plane displacement compared to the predominantly elastic behavior of the polymeric sandwiches; as a consequence the impact damage can be often detectable by a simple visual inspection of the sandwich structures. Moreover, the AFS structures are relatively intact compared to the more catastrophic and localized fracture of the polymeric sandwiches, so they exhibit a better post-impact damage tolerance and mechanical properties [7,8,12].…”

supporting

confidence: 71%

Impact Response of Aluminum Foam Sandwiches for Light-Weight Ship Structures

Crupi

Guglielmino

2011

Metals

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Abstract:The structures realized using sandwich technologies combine low weight with high energy absorbing capacity, so they are suitable for applications in the transport industry (automotive, aerospace, shipbuilding industry) where the "lightweight design" philosophy and the safety of vehicles are very important aspects. While sandwich structures with polymeric foams have been applied for many years, currently there is a considerable and growing interest in the use of sandwiches with aluminum foam core. The aim of this paper was the analysis of low-velocity impact response of AFS (aluminum foam sandwiches) panels and the investigation of their collapse modes. Low velocity impact tests were carried out by a drop test machine and a theoretical approach, based on the energy balance model, has been applied to investigate their impact behavior. The failure mode and the internal damage of the impacted AFS have also been investigated by a Computed Tomography (CT) system.

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confidence: 71%

Impact Response of Aluminum Foam Sandwiches for Light-Weight Ship Structures

Crupi

Guglielmino

2011

Metals

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“…Hazizan et al [6] carried out low velocity impact tests in order to investigate the response of sandwiches, made of aluminium honeycomb core and glass fibre reinforced/epoxy skins. Compston et al [7] compared the low velocity impact behaviour of aluminium foam and polymeric foam sandwiches and different damage modes were observed: the polymeric foam sandwiches exhibited localized damage (skin fracture and core crushing) with negligible permanent out-of plane strain, whereas the aluminium foam sandwiches experienced little fracture with extensive permanent out-of plane strain. Moreover the post impact characterization tests showed that the aluminium foam specimens exhibited lower strain, suggesting a better damage tolerance respect to the polymeric foam sandwiches.…”

Section: Introductionmentioning

confidence: 99%

Computed Tomography analysis of damage in composites subjected to impact loading

Crupi¹,

Guglielmino²

2011

Frattura Ed Integrità Strutturale

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The composites, used in the transportation engineering, include different classes with a wide range of materials and properties within each type. The following different typologies of composites have been investigated: laminated composites, PVC foam sandwiches, aluminium foam and honeycomb sandwiches. Aim of this paper was the analysis of low-velocity impact response of such composites and the investigation of their collapse modes. Low velocity impact tests were carried out by a drop test machine in order to investigate and compare their structural response in terms of energy absorption capacity. The failure mode and the internal damage of the impacted composites have been, also, investigated using 3D Computed Tomography.

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“…Numerical simulation study has been conducted with LS-DYNA software based on the tests, and the simulation results agree well with the experiments. Compston et al [13] have investigated the low energy impact damage modes in aluminum foam sandwich panel with a double pendulum impact tester and three-dimensional laser scanning system. Crupi et al [14] have studied the lowvelocity impact behavior of aluminum foam sandwich panels, and the experimental results were compared to the polyvinyl chloride (PVC) foam sandwiches.…”

Section: Introductionmentioning

confidence: 99%

Research on the energy absorption properties of aluminum foam composite panels with enhanced ribs subjected to uniform distributed loading

Xie

Tang

Liu

et al. 2014

Jnl of Sandwich Structures & Materials

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A new design of aluminum foam composite panels with enhanced ribs was proposed, and the energy absorption property of it was analyzed by combining dynamic testing and numerical simulation. The optimization of aluminum foam composite panels with enhanced ribs was investigated assuming that the panels had the same total mass. An Instron drop hammer test machine was used to study the dynamic compressive behavior of the new composite panels and the impact deformation characteristics of the components. Finite element method (FEM) software was employed to simulate the loading process, and the simulation results were compared with the experimental data for validating the reliability of the model. The effect of rib-mass ratio on the energy absorption property was investigated, and the energy absorption capacities of the new composite panels and conventional sandwiches were compared at different impact velocities. The analysis shows that, compared with conventional sandwich panels, aluminum foam composite panels with enhanced ribs have better energy absorption subjected to uniform distributed loading; and both rib-mass ratio and impact velocity have an effect on the normalized energy absorption. The results of this study can be a reference for related academic research and engineering application.

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Low Energy Impact Damage Modes in Aluminum Foam and Polymer Foam Sandwich Structures

Cited by 37 publications

References 16 publications

Impact Response of Aluminum Foam Sandwiches for Light-Weight Ship Structures

Impact Response of Aluminum Foam Sandwiches for Light-Weight Ship Structures

Computed Tomography analysis of damage in composites subjected to impact loading

Research on the energy absorption properties of aluminum foam composite panels with enhanced ribs subjected to uniform distributed loading

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