Identification and prediction of cyclic fatigue behaviour in sandwich panels

Boukharouba, Wahid; Bezazi, Abderrezak; Scarpa, Fabrizio

doi:10.1016/j.measurement.2014.03.041

Cited by 24 publications

(13 citation statements)

References 30 publications

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“…This corresponds to a rapid initial loss of mechanical properties during the first 100 cycles, followed by a progressive evolution of the damage mechanisms. This behaviour is commonly observed for sandwich structures with GFRP skins and foam cores [40,41]. It is worth noticing that whatever the loading ratio, the beams tested with d ¼ 110 mm present a higher degradation rate and fail earlier than beams tested with a span length d ¼ 250 mm.…”

Section: Fatigue Behaviourmentioning

confidence: 55%

Quasi-static and fatigue properties of a balsa cored sandwich structure with thermoplastic skins reinforced by flax fibres

Monti

Mahi

Jendli³

et al. 2018

Jnl of Sandwich Structures & Materials

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. This is an author-deposited version published in: https://sam.ensam.eu Handle ID: .http://hdl.handle.net/10985/17596 To cite this version :Arthur MONTI, Abderrahim EL MAHI, Zouhaier JENDLI, Laurent GUILLAUMAT -Quasi-static and fatigue properties of a balsa cored sandwich structure with thermoplastic skins reinforced by flax Abstract This paper presents the results of several experimental analyses performed on a biobased sandwich structure. The material studied is made up of thermoplastic skins reinforced by flax fibres and applied to a balsa core. It is produced by a single-step liquid resin infusion process. First, the skin-core interfacial properties were measured and compared with those of the existing materials. Then, several quasi-static and dynamic analyses were performed to study the flexural behaviour of sandwich beams. The elastic and ultimate properties of the skins and core were deduced from these flexural tests. In addition, a failure mode map was developed based on the existing theories to explain the failure modes observed under different boundary conditions. The influence of the statistical spread of the core's mechanical properties on the failure of sandwich beams was considered. Moreover, fatigue analyses were conducted to determine the fatigue resistance of this bio-based structure. Its behaviour was compared with that of the previously tested non-bio-based sandwich beams.Finally, the fatigue loss factor evolution of this structure under several loading ratios was measured and discussed. This study aims to determine some of the main mechanical properties of this material to see whether or not it might be suitable for industrial applications currently using glass fibre reinforced polymer/foam cored sandwich structures.

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Section: Fatigue Behaviourmentioning

confidence: 55%

Quasi-static and fatigue properties of a balsa cored sandwich structure with thermoplastic skins reinforced by flax fibres

Monti

Mahi

Jendli³

et al. 2018

Jnl of Sandwich Structures & Materials

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“…The normalised stiffness variation with the number of cycles, evaluated for the fatigue tests at σ max =640 MPa for the CFRP panels with R/ 1FS and 5CNBR-NP/ R matrices is shown in Figure 6. In general, materials exhibit stiffness reduction with fatigue cycles [13,14]. It may be noted that the initial stiffness reduction for both samples is significant, however, rate of this reduction was slightly higher for the CFRP panel with 5CNBR-NP/ R matrix.…”

Section: Resultsmentioning

confidence: 86%

Influence of nanorubber toughening on the tensile deformation and tensile fatigue behaviour of a carbon fibre-reinforced epoxy composite

Özdemir

Zhang

Hadavinia

et al. 2015

Journal of Composite Materials

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This study investigates the effect of nano carboxylic acrylonitrile butadiene rubber (CNBR-NP) on the tensile fatigue behaviour of carbon fibre reinforced polymer composites (CFRP) with dicyandiamide-cured epoxy matrix. The stress-controlled tension-tension fatigue behaviour at a stress ratio of R=0.1 was investigated for CFRP with neat and nanorubber-modified epoxy matrices with CNBR-NP loadings of 5, 10, 15, 20 phr. The normalised test data revealed that the high cycle fatigue lifetime of the epoxy resin modified with 15 phr of CNBR-NP was increased twice relative to the neat epoxy resin. Scanning electron microscopy (SEM) images of the fracture surfaces showed that the improved plastic deformation and energy dissipation at the fibre-matrix interface contributed towards the enhanced fatigue life of the CFRP.

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“…Honeycomb structures are most commonly used in sandwich composites as well as in many other industrial products because of high energy absorbing capability, high strength/stiffness, and strength/ weight ratios [18][19][20]. Honeycombs act in a different way under dynamic load in terms of failure modes and carry high fatigue life [21][22][23]. Engineered wood elements can be developed in honeycomb structures to reduce the consumption of wood products with maintaining the structural capacity.…”

Section: Introductionmentioning

confidence: 99%

Investigating the performance of GFRP/wood-based honeycomb sandwich panels for sustainable prefab building construction

Hussain¹,

Abbas

Zahra

et al. 2019

SN Appl. Sci.

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The static failure behavior of innovative wood-based sandwich panels with wood-based core and face sheets made of glass fiber reinforced polymer was investigated. The sandwich panels were subjected to three-point bending and compression tests to determine their strengths and their failure mechanisms. The honeycomb core of medium density fiberboard (MDF) was manufactured to reduce the weight of the whole panel as well as the consumption of wood elements. The hollow portions of the honeycomb core were filled with wheat straw to increase the heat resistance of the whole structure by maintaining a lightweight. The tests showed that the mechanical characteristics of solid MDF structures were high as compared to MDF honeycomb panels. But, MDF honeycomb structures were superior because of their capability to sustain against the load after the failure. Load absorption capabilities and strength of honeycomb sandwich panels filled with wheat straw were little improved. The major fracture modes were transverse shear, longitudinal shear, and delamination. The delamination at core and facing interface was the significant problem which can effectively be reduced by using inserts into the core above face sheets.

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Identification and prediction of cyclic fatigue behaviour in sandwich panels

Cited by 24 publications

References 30 publications

Quasi-static and fatigue properties of a balsa cored sandwich structure with thermoplastic skins reinforced by flax fibres

Quasi-static and fatigue properties of a balsa cored sandwich structure with thermoplastic skins reinforced by flax fibres

Influence of nanorubber toughening on the tensile deformation and tensile fatigue behaviour of a carbon fibre-reinforced epoxy composite

Investigating the performance of GFRP/wood-based honeycomb sandwich panels for sustainable prefab building construction

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