A comparative evaluation of crashworthy composite sandwich structures

Pitarresi, Giuseppe; Carruthers, J. J.; Robinson, Alice M.; Torre, G. Carbajal-De la; Kenny, J. M.; Ingleton, S; Velecela, O.; Found, M.S.

doi:10.1016/j.compstruct.2005.08.008

Cited by 51 publications

(34 citation statements)

References 8 publications

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“…Other trigger mechanisms studied include the tulip [12,20] and ply drop [21]. Some authors have designed the structures so that they are self-triggering, for example, using corrugated [22] or hourglass profiles [20]. Others have evaluated different types of material systems and layup configuration [19,23].…”

Section: = (2)mentioning

confidence: 99%

Crush responses of composite cylinder under quasi-static and dynamic loading

Chiu

Falzon

Ruan

et al. 2015

Composite Structures

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General rights Copyright for the publications made accessible via the Queen's University Belfast Research Portal is retained by the author(s) and / or other copyright owners and it is a condition of accessing these publications that users recognise and abide by the legal requirements associated with these rights. AbstractDespite the abundance of studies investigating the performance of composite structures under crush loading, disagreement remains in the literature regarding the effect of increased strain rate on the crush response. This study reports an experimental investigation of the behaviour of a carbon-epoxy composite energy absorber under static and dynamic loading with a strain rate of up to 100 −1 . Good consistency, among samples tested under the same strain rate, was achieved in the identified damage modes and the measured force responses. The energy absorption was found to be independent of strain rate as the total energy absorption appeared to be dominated by fibredominated fracture, which is independent of strain rate within the studied range. The results from this study can inform the design of energy absorbing structures.

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Section: = (2)mentioning

confidence: 99%

Crush responses of composite cylinder under quasi-static and dynamic loading

Chiu

Falzon

Ruan

et al. 2015

Composite Structures

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“…A typical solution is to use sandwich structures, where the composite skins provide stiffness and strength, and a light crushable core dissipates damage and energy. Sandwich structures used under crushing [4,5] or bending [6,7] show greater specific energy absorptions than the monolithic counterparts.…”

Section: Introductionmentioning

confidence: 99%

Wavy-ply sandwich with composite skins and crushable core for ductility and energy absorption

Pimenta

Robinson

2014

Composite Structures

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Conventional composite materials offer high specific stiffness and strength, but suffer from low failure strains and failure without warning. This work proposes a new design for sandwich structures with symmetrically-wavy composite skins and a crushable foam core, aiming to achieve large strains (due to unfolding of the skins) and energy absorption (due to crushing of the foam core) under tensile loading. The structure is designed by a combination of analytical modelling and finite element simulations, and the concept is demonstrated experimentally.When loaded under quasi-static tension, wavy-ply sandwich specimens with carbon-epoxy skins and optimised geometry exhibited an average failure strain of 8.6%, a specific energy dissipated of 9.4 kJ/kg, and ultimate strength of 1570 MPa. The scope for further developing the wavy-ply sandwich concept and potential applications requiring large deformations and energy absorption are discussed.

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“…The differences in layer thickness between the two configurations were due to slightly different fibre volume fractions resulting from slightly different manufacturing conditions. Further detail of the manufacture of the hollow sections has been discussed by Pitarresi et al [16].…”

Section: Structural Configuration and Materialsmentioning

confidence: 98%

“…The energy absorption of hollow sandwich sections with reinforced cores was studied by Pitarresi et al [16], who demonstrated that sandwich composites with tied cores could show progressive crushing modes of failure, making them attractive for energy absorption applications in surface transportation. Mamalis and co-authors [17] have recently investigated the numerical simulation of the crushing of hollow box structures with tied cores, demonstrating that the numerical approach based on explicit time integration can be successfully applied to predict their response.…”

Section: Introductionmentioning

confidence: 99%

Progressive Failure of Composite Hollow Sections with Foam-Filled Corrugated Sandwich Walls

2007

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The aim of this paper was to model the progressive failure of foam-filled twinwalled composite hollow box sections with internal reinforcement. The effect of different corner designs, and different arrangements of the corrugation inside the core were investigated. The numerical model developed to simulate quasi-static compression tests involved integrating a progressive failure criterion into an explicit dynamic analysis code. The model provided very good correlation with experimental crush force data and effectively described the progressive material failure. It also enabled the energy absorption contribution of each of the main structural components to be determined. It was concluded that this particular approach had the potential to be used in the design and optimisation of crashworthy composite structures containing similar features to those involved here. List of symbolss 11 , s 22 and s 12 in-plane longitudinal transverse and shear stress X t longitudinal tensile strength X c longitudinal compressive strength Y t transverse tensile strength Y c transverse tensile strength S c shear strength b failure parameter accounting for the effects of s 12 in the fiber tension criteria for the composite elements A transverse cross section of the composite hollow box ϑ Volumetric Strain V volume of material

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A comparative evaluation of crashworthy composite sandwich structures

Cited by 51 publications

References 8 publications

Crush responses of composite cylinder under quasi-static and dynamic loading

Crush responses of composite cylinder under quasi-static and dynamic loading

Wavy-ply sandwich with composite skins and crushable core for ductility and energy absorption

Progressive Failure of Composite Hollow Sections with Foam-Filled Corrugated Sandwich Walls

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