Experimental, Theoretical and Numerical Investigation of the Flexural Behaviour of the Composite Sandwich Panels with PVC Foam Core

Mostafa, Ahmed; Shankar, Krishna; Морозов, Е.В.

doi:10.1007/s10443-013-9361-4

Cited by 38 publications

(24 citation statements)

References 19 publications

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“…This failure mechanism needs further investigation. In many circumstances, researchers have found the differences between experimental and theoretical failure loads of sandwich beams up to 20% [19], 21% [31], 30% [37], 34% [18], and even up to 100% [7]. Therefore, further investigation is necessary to establish better theoretical models that can capture the insight into the response of the sandwich beams.…”

Section: Comparison Between Calculated and Actual Failure Loadmentioning

confidence: 99%

Effect of beam orientation on the static behaviour of phenolic core sandwich composites with different shear span-to-depth ratios

Ferdous

Manalo

Aravinthan

2017

Composite Structures

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Please cite this article as: Ferdous, W., Manalo, A., Aravinthan, T., Effect of beam orientation on the static behaviour of phenolic core sandwich composites with different shear span-to-depth ratios, Composite Structures (2017), doi: http://dx. AbstractThis study thoroughly investigated the flexural behaviour of phenolic cored sandwich beams with glass fibre composite skins in the horizontal and vertical positions. The beams have a shear span-to-depth ratio (a/d) varying between 0.5 and 12, and tested under 4-point static bending. Their failure load are then predicted theoretically. The results showed that changing the beam orientation from horizontal to vertical changes the failure mode from brittle to progressive. The sandwich beam's high bending stiffness can be efficiently utilised by placing them vertically. The a/d ratio played a major role on the load capacity and failure mode. In both orientations, the load capacity decreased with the increased of a/d. The beam failed in shear, a combined shear and bending, and bending for a/d ≤ 2, 2 < a/d < 6, and a/d ≥ 6, respectively. These failure mechanisms can be correlated to the shear-to-bending stress ratio while the failure load can be reasonably predicted using the available theoretical models.The two-way analysis of variance showed that the beam orientation is a more influential parameter than the a/d ratio. From this study, the horizontal beams are preferable for flexural dominated structures while the vertical beams are desirable for shear dominated structures.

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Section: Comparison Between Calculated and Actual Failure Loadmentioning

confidence: 99%

Effect of beam orientation on the static behaviour of phenolic core sandwich composites with different shear span-to-depth ratios

Ferdous

Manalo

Aravinthan

2017

Composite Structures

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“…Another trend is studying the behavior of sandwich panels or beams with a CFRP faces having differences in tension and compression along with the other mentioned nonlinearities [11][12][13]. These works concern the problem of flexure of CFRPs and similar materials.…”

Section: Introductionmentioning

confidence: 99%

“…The first paper [11] is devoted to experimental investigations and shows most of the nonlinearities we supposed such materials should have: stiffening in tension, softening in compression, different moduli even at the origin of coordinates. Other two works [12,13] present more complex studies including full cycle of mathematical modeling spanning from the experimental investigations to numerical ones.…”

Section: Introductionmentioning

confidence: 99%

Mathematical Modeling and Numerical Optimization of Composite Structures

Golushko¹

2019

Optimum Composite Structures

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This chapter is devoted to modeling the properties of composite materials and structures. Mathematical relations describing the nonlinear elastic three-point bending of isotropic and reinforced beams with account of different strength and stiffness behavior in tension and compression are obtained. An algorithm for numerical solution of corresponding boundary-value problems is proposed and implemented. Results of numerical modeling were compared to acquired data for polymer matrix and structural carbon fiber reinforced plastics. A computational technology for analysis and optimization of composite pressure vessels was developed and presented.

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“…Trial FE analyses indicated that the low stiffness of the core leads to significant deformations and so geometric nonlinearity has been taken into account as well. Importance of nonlinear approach has been also reported in recent research [19,21,35]. All tested samples have lost their load-bearing capacity with the initiation of damage, so failure was modelled by ductile damage initiation criterion only, without defining damage evolution behaviour.…”

Section: Fem Model Descriptionmentioning

confidence: 99%

“…CSIP's facings are made of composite materials which make it considerably stronger, immune to biological corrosion and more durable to weather conditions. Such desirable improvements, in comparison to traditional SIPs, make CSIPs a very attractive alternative with a broader field of applications [16][17][18][19][20][21]. Increased strength of this type of sandwich makes it a viable option even in bridge structures [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Failure mode prediction for composite structural insulated panels with MgO board facings

Smakosz

Kreja

2018

AIP Conference Proceedings

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Abstract. Sandwich panels are readily used in civil engineering due to their high strength to weight ratio and the ease and speed of assembly. The idea of a sandwich section is to combine thin and durable facings with a light-weight core and the choice of materials used allows obtaining the desired behaviour. Panels in consideration consist of MgO (magnesium oxide) board facings and expanded polystyrene core and are characterized by immunity to biological corrosion, a high thermal insulation and a relatively low impact on environment. Customizing the range of panels to meet market needs requires frequent size changes, leading to different failure modes, which are identified in a series of costly full-scale laboratory tests. A nonlinear numerical model was created with a use of a commercial ABAQUS code and a user-defined procedure, which is able to reproduce observed failure mechanisms; its parameters were established on the basis of small-scale tests and numerical experiments. The model was validated by a comparison with the results of the full-scale bending and compression tests. The results obtained were in satisfactory agreement with the test data.

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Experimental, Theoretical and Numerical Investigation of the Flexural Behaviour of the Composite Sandwich Panels with PVC Foam Core

Cited by 38 publications

References 19 publications

Effect of beam orientation on the static behaviour of phenolic core sandwich composites with different shear span-to-depth ratios

Effect of beam orientation on the static behaviour of phenolic core sandwich composites with different shear span-to-depth ratios

Mathematical Modeling and Numerical Optimization of Composite Structures

Failure mode prediction for composite structural insulated panels with MgO board facings

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