The influence of geometric imperfections on the stability of three-layer beams with foam core

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The main objective of this work is the numerical analysis (FE analysis) of stability of three-layer beams with metal foam core (alumina foam core). The beams were subjected to pure bending. The analysis of the local buckling was performed. Furthermore, the influence of geometric parameters of the beam and material properties of the core (linear and non-linear model) on critical loads values and buckling shape were also investigated. The calculations were made on a family of beams with different mechanical properties of the core (elastic and elastic-plastic material). In addition, the influence of geometric imperfections on deflection and normal stress values of the core and the faces has been evaluated.


[1] Alipour M.M., Shariyat M.,Analytical zigzag formulation with3D elasticity corrections for bending and stress analysis of circular/annular composite sandwich plates with auxetic cores,Composite Structures 132 (2015) 175-197. [2] Andrews E., Sanders W., Gibson L.J., Compressive and tensilebehaviour of aluminum foams, Materials Science andEngineering 270 (1999) 113-124. [3] Best Practice Guide for Sandwich Structures in MarineApplications, New Rail, University of Newcastle upon Tyne,SANDCORE (2005). [4] Carrera E., Brischetto S., Nali P., Plates and shells for smart-structures, John Wiley & Sons; 2011. [5] Hadi B.K., Wrinkling of sandwich column: comparison between finite element analysis and analytical solutions,Composite Structures 53 (1991) 477-482. [6] Khalili S.M.R., Botshekanan Dehkordi M., Carrera E.,Shariyat M., Non-linear dynamic analysis of a sandwich beam with pseudoelastic SMA hybrid composite faces based onhigher order finite element theory, Composite Structures, 96(2013) 243-55. [7] Magnucki K., Szyc W., Wytrzymałość i stateczność belek i płyttrójwarstwowych z rdzeniem z pianki aluminiowej,Wydawnictwo Politechniki Poznańskiej(2012). [8] Pawlus D., Stateczność dynamiczna trójwarstwowych płytpierścieniowych z rdzeniem lepko sprężystym, RozprawyNaukowe Z. 399, Łódź (2010). [9] Reddy J.N., Mechanics of laminated composite plates and shells: theory and analysis, 2nd ed. CRC Press (2004). [10] Sofiyev A.H., The vibration and buckling of sandwich-cylindrical shells covered by different coatings subjected to the hydrostatic pressure, Composite Structures, 117 (2014) 124-34. [11] Stiftinger M.A., Rammerstorfer F.G., Face Layer Wrinkling in Sandwich Shells - Theoretical and Experimental Investigation,Thin-Walled Structured, 29 (1997) 113-127. [12] Vinson J. R., Sandwich structures, American Society of Mechanical Engineers, 54(3) (2001) 201-214.

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