THERMAL SCIENCE

International Scientific Journal

Thermal Science - Online First

online first only

Static and thermal behaviour of ship structure sandwich panels

ABSTRACT
The mechanical properties of certain flexible core materials of ship structure sandwich panels, having skins made of metallic or composite laminates may be significantly influenced by the temperature variations that may occur during the operational loading. At the same time, the improving knowledge of the behaviour of these panels in terms of bending strength and other stress / strain related aspects in various harsh conditions increases their superiority in terms of weight-to-strength ratio, high stiffness, easy to manufacture, acoustic and thermal insulation. In the paper, the behaviour of the ship structural rectangular sandwich panels to the mechanical and thermal loading are presented. The sandwiches have a special core of 20 mm and skins made out of different materials (glass fiber reinforced polyester, steel and aluminium) with a thickness of 3 mm. Analysis consists of the behaviour of the composite sandwich panels in the bending test at constant speed by the three-point method, for three distances between different supports, by measuring the maximum displacement and force applied to the specimens under various thermal fields. The sandwich structures are also thermally analysed, determining their thermal conductivity by the heat flow measurement method. The experimental results are compared with the results obtained by finite element analysis in numerical simulation of all modelling cases.
KEYWORDS
PAPER SUBMITTED: 2019-05-31
PAPER REVISED: 2019-12-07
PAPER ACCEPTED: 2019-12-14
PUBLISHED ONLINE: 2020-01-04
DOI REFERENCE: https://doi.org/10.2298/TSCI190531463B
REFERENCES
  1. Grabian, J., et al., The Role of Innovative Composite Materials in the Safe and Efficient Operation of Floating Marine Structures, Scientific Journals of the Maritime University of Szczecin, 52 (2017), 124, pp. 23-29, DOI: 10.17402/241
  2. Selvaraju, S., Ilaiyavel, S., Applications of Composites in Marine Industry, Journal of Engineering Research and Studies, II (2011), II, pp. 89-91
  3. Tabacu, S., et al., Structural Performances of Thermoplastic Manufactured Parts, Mat. Plast., 45 (2008), 1, pp.113-118
  4. Mavhungu, S.T., Akinlabi, E.T., Onitiri, M.A. , Varachia, F.M., Aluminum Matrix Composites for Industrial Use: Advances and Trends, Procedia Manufacturing, 7 (2017), pp. 178-182
  5. Lancaster, L., Lung, M.H., Debnath, S., Utilization of Agro-Industrial Waste in Metal Matrix Composites: Towards Sustainability, International Journal of Environmental, Ecological, Geomatics, Earth Science and Engineering, 7 (2013), 1, pp. 25-33
  6. Rayjade, G.R., et al., Study of Composite Sandwich Structure and Bending Characteristics - A Review, International Journal of Current Engineering and Technology, 5 (2015), 2, pp. 797-802
  7. Frostig, Y., Thomsen, O.T., Non-linear thermal response of sandwich panels with a flexible core and temperature dependent mechanical propertie's, Composites: Part B, 39 (2008), pp. 165-184
  8. Beznea, E.F., Chirică, I., Baroiu, N., Teodor, V.G., Parametric study of experimental and numerical simulation of sandwich composite structures flexural behaviour, Materiale Plastice, 54 (2017), 4, pp. 682-688
  9. Thomas, M., Boyard, N., Lef`ever, N., Jarny, Y., Delaunay, D., An experimental device for the simultaneous estimation of the thermal conductivity 3-D tensor and the specific heat of orthotropic composite materials, Compos. Sci. Technol., 53 (2010.), pp. 5487-5498
  10. Matine, A., et al., Thermal properties of composite materials: effective conductivity tensor and edge effects, Journal of Physics: Conference Series 395 (2012)
  11. Tsekmes, I.A., Kochetov, R. Morshuis, P.H.F., Smit, J.J., Thermal Conductivity of Polymeric Composites: A Review, IEEE International Conference on Solid Dielectrics (2013), Bologna
  12. Villière, M., et al., Experimental determination and modeling of thermal conductivity tensor of carbon/epoxy composite, Composites: Part A, 46 (2013), pp. 60-68
  13. ISO 8301:1991. Thermal Insulation - Determination of Steady-State Thermal Resistance and Related Properties - Heat Flow Meter Apparatus
  14. SR EN ISO 178, Plastics. Determination of flexural properties
  15. Hilton 480 unit Instruction manual
  16. Beznea, E.F., Coman, G., Baroiu, N., Chirică, I., Influence of the Thermal Field on Static Behaviour of Sandwich Structures, Materiale Plastice, 56 (2019), 1, pp. 110-114