On the crushing response of composite sandwich panels subjected to edgewise compression: experimental

Mamalis, A.G.; Manolakos, D.E.; Ioannidis, M.B.; Papapostolou, D.P.

doi:10.1016/j.compstruct.2004.10.006

Cited by 87 publications

(45 citation statements)

References 5 publications

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“…As expected, the failure of the coupons during edgewise compression testing followed previously observed trends [5,17], where the untufted reference coupons failed in an unstable and unpredictable manner, an example of which can be seen in Figure 8, where the untufted coupon has failed by disbonding of the facesheets and collapse of the foam core. In comparison in the same figure, the tufted coupon exhibits a stable progressive splaying failure of the facesheets, as the interface with the core remains intact for a longer period.…”

Section: Edgewise Compression Testingsupporting

confidence: 81%

“…Whilst the use of FRPs is potentially a lightweight design solution due to the brittle failure of the material potentially absorbing more energy than current metallic structures [4], the use of FRPs within safety systems is currently limited to the high performance and motorsport sectors. For sandwich structures in particular, an inherent weakness at the interface between skin and core can lead to a catastrophic unstable collapse of the structure, under an edgewise impact load, which is not an efficient, or safe energy absorbing mechanism [5].…”

Section: Introductionmentioning

confidence: 99%

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Improving the Understanding of Tufted Energy Absorbing Sandwich Structures

Hartley¹,

Ward²

2017

American Society for Composites 2017

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Tufting has been shown to be an effective method for improving the performance of sandwich structures against edgewise impact loading. However, the mechanisms that take place during failure, and the role the tufts play within this are not well characterised. Experimental testing has therefore been carried out to improve the understanding of the failure behaviour of these structures, with the particular focus of this study being on investigating the behaviour of the tufts themselves. Firstly quasistatic edgewise crushing tests were carried out to visually identify the failure behaviour of the tufts, indicating that the tufts 'drift' and collide as they fail. Follow up testing was then carried out on the interaction between the tufts and the surrounding foam core. Whilst it was observed that single tufts only have a very small contribution to the overall energy absorption of a tufted panel, this contribution can increase significantly with the addition of multiple tufts, and allowing interactions to occur between them. This behaviour could therefore be designed into the structure to help maximise the energy absorption during an impact event.

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Section: Edgewise Compression Testingsupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Improving the Understanding of Tufted Energy Absorbing Sandwich Structures

Hartley¹,

Ward²

2017

American Society for Composites 2017

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“…Structural crashworthiness refers to the impact performance of a structure, particularly resistance, which enables a structure to protect its occupants from accidents during collision [1]. Ensuring that a structure is capable of withstanding impact forces and is capable of absorbing energy is necessary [3,5].…”

Section: Overviewmentioning

confidence: 99%

“…Several properties of composites, such as their non-conductivity, strength, stiffness, light weight, corrosion resistance, and low coefficient of thermal expansion, make them attractive design options for many structural, marine, automotive, and aerospace applications [2]. High initial costs and other unique properties are major considerations that prevent the widespread use of composite materials [3][4][5]. Pultrusion is a manufacturing method in which wetted fibers are drawn through a heated curing die to produce high-performance constant cross-section composites at low cost.…”

Section: Introductionmentioning

confidence: 99%

Investigating the quasi-static axial crushing behavior of polymeric foam-filled composite pultrusion square tubes

et al. 2014

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“…The in-plane buckling behavior of sandwich composites has been studied for years [17,18]. There are three main Fig.…”

Section: In-plane Buckling Of Sandwich Compositesmentioning

confidence: 99%

Blast Performance of Sandwich Composites with In-Plane Compressive Loading

Wang

Shukla

2011

Exp Mech

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An experimental investigation was conducted to evaluate the dynamic performance of E-glass Vinyl Ester composite face sheet / foam core sandwich panels when subjected to pre-compression and subsequent blast loading. The sandwich panels were subjected to 0 kN, 15 kN and 25 kN of in plane compression respectively, prior to transverse blast wave loading with peak incident pressure of 1 MPa and velocity of 3 Mach. The blast loading was generated using a shock tube facility. During the experiments, a high-speed photographic system utilizing three digital cameras was used to acquire the real-time 3-D deformation of the sandwich panels. The 3D Digital Image Correlation (DIC) technique was used to quantify the back face out-of-plane deflection and in-plane strain. The results showed that in-plane compressive loading facilitated buckling and failure in the front face sheet. This mechanism greatly reduced the blast resistance of sandwich composites.

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On the crushing response of composite sandwich panels subjected to edgewise compression: experimental

Cited by 87 publications

References 5 publications

Improving the Understanding of Tufted Energy Absorbing Sandwich Structures

Improving the Understanding of Tufted Energy Absorbing Sandwich Structures

Investigating the quasi-static axial crushing behavior of polymeric foam-filled composite pultrusion square tubes

Blast Performance of Sandwich Composites with In-Plane Compressive Loading

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