Mechanical characterisation of a glass/polyester sandwich structure for marine applications

Bella, G. Di; Calabrese, Luigi; Borsellino, C.

doi:10.1016/j.matdes.2012.06.023

Cited by 56 publications

(23 citation statements)

References 17 publications

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“…Such an optimized design provides high bending stiffness and strength at a low weight. As a result, sandwich composites have been utilized broadly in the transportation, energy, aerospace and marine industries [1][2][3][4]. One essential concern for such sandwich composites during service is their structural durability when exposed to high relative humidity (RH) or water immersion conditioning.…”

Section: Introductionmentioning

confidence: 99%

Experimentation and simulation of moisture diffusion in foam-cored polyurethane sandwich structure

Huo

Mohamed

Nicholas

et al. 2015

Jnl of Sandwich Structures & Materials

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The moisture diffusion behavior of two-part thermoset polyurethane neat resin, woven E-glass fiber-reinforced polyurethane face sheet, closed-cell rigid polyurethane foam core and their corresponding sandwich specimens was investigated in this study. The vacuum-assisted resin transfer molding process was used to manufacture the polyurethane sandwich panels. Open-edge moisture diffusion experiment was conducted for sandwich panel and its constituents by immersing each type of samples in distilled water at room temperature for nearly seven months. Moisture diffusivities and solubility for neat resin, face sheet and foam core specimens were characterized according to the experimental analysis. The moisture diffusion behavior for closed-cell polyurethane foam was found to deviate significantly from classical Fick's law, and a multi-stage diffusion model was thus proposed to explain this deviation using a time-dependent diffusivity scheme. A user-defined subroutine was developed to implement this scheme into the commercial finite element analysis code ABAQUS. A three-dimensional dynamic finite element model was developed to predict the moisture diffusion behavior in neat resin, face sheet, foam core and sandwich specimens. This finite element model was then validated by comparing simulation results with experimental findings.

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Section: Introductionmentioning

confidence: 99%

Experimentation and simulation of moisture diffusion in foam-cored polyurethane sandwich structure

Huo

Mohamed

Nicholas

et al. 2015

Jnl of Sandwich Structures & Materials

View full text Add to dashboard Cite

show abstract

“…The tidal turbine technology is not very well matured and experimental data are needed to aid in material selection [1][2][3][4]. In order to use composite materials in such applications, knowledge of their mechanical behaviour is required and also a better understanding of the different failure modes under various loading conditions is essential.…”

Section: Introductionmentioning

confidence: 99%

“…In sandwich composites, by placing the stiff material between the faces far from the neutral axes, a high bending stiffness is obtainable. The faces endure most of the normal and bending stresses, while the core carries the shear stresses [3,5].…”

Section: Introductionmentioning

confidence: 99%

“…Davalos and Qiao [6] performed finite element analysis on honeycomb composites and reached the conclusion that there is a good agreement between experimental values and analytical prediction in the four point bending test. Mechanical behaviour of a glass-polyester sandwich structures for high performance equipment in marine applications was investigated by Di Bella [3]. Behaviour of the sandwich composites was studied under different quasi-static conditions like three point bending, flatwise, edgewise compression and torsion tests.…”

Section: Introductionmentioning

confidence: 99%

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Fatigue of Sandwich Composites in Air and Seawater

2016

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In this study, the fatigue behaviour of sandwich composites was investigated in both, air and seawater. S-N curves were obtained for different stress levels. 3-point bending (3PB) tests were also performed to investigate strength degradation during the fatigue test. Finite element analyses were carried out to determine the stress distribution in the test coupons used in bending tests. These were used to predict the failure of the composite and to interpret the experimental results. There is good agreement between finite element analysis and experimental results at lower loads. Small deviations were observed at higher loads due to the influence of defects. The typical failure modes observed under quasi-static 3PBT were debonding, fibre pull-out and matrix cracking.

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“…[4][5][6][7][8][9][10] Studies have been focused on optimizing the design of the composite structures 4 and understanding its mechanical behavior 5,6 under bending load, 7 shear load, 8 and torsion and flatwise compression. 9 A test method is proposed to evaluate the shearing modulus of foamed core used for sandwich structures. 10 It is seen that the traditional foam core sandwich structure has some defects, such as poor damage resistance and more susceptible to impact damage than traditional metallic structures.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the mechanical properties of looped fabric reinforced foam core sandwich composite

Dai

Zhou

Sun

et al. 2015

Journal of Composite Materials

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One of the well-known advantages of the sandwich construction is its high specific stiffness with lightweight. The property of withstanding the shearing, peeling, and flatwise tensile loading is an important factor of designing the sandwich structure. In the present study, the looped fabric reinforced foam core sandwich composite (U-cor) is proposed, and its flatwise tensile, peeling and shearing responses are investigated. Experiments are performed to study the mechanical behavior of the rigid polyurethane foam (RPUF) of different densities under tension, compression, and shear loading. Specimens of U-cor and the traditional 2D woven fabric reinforced foam sandwich composite (2DRFS) with thick and thin fiber yarns are investigated. Results show that the main failure mode of the 2DRFS is skin-core debonding. For the U-cor, the damage patterns are far more complicated. Besides breakage of foam, breakage of loop yarn may also occur. The interface performance of the U-cor is much better than that of the 2DRFS. Finite element analysis of U-cor under shearing load in warp direction is performed. The predicted shear strengths and failure modes are in good agreement with the experimental results.

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Mechanical characterisation of a glass/polyester sandwich structure for marine applications

Cited by 56 publications

References 17 publications

Experimentation and simulation of moisture diffusion in foam-cored polyurethane sandwich structure

Experimentation and simulation of moisture diffusion in foam-cored polyurethane sandwich structure

Fatigue of Sandwich Composites in Air and Seawater

Experimental study on the mechanical properties of looped fabric reinforced foam core sandwich composite

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