Experimental and Numerical Flexural Properties of Sandwich Structure with Functionally Graded Porous Materials

Njim, Emad; Bakhi, Sadeq H.; Al-Waily, Muhannad

doi:10.30684/etj.v40i1.2184

	Experimental and Numerical Flexural Properties of Sandwich Structure with Functionally Graded Porous Materials
Engineering and Technology Journal
Article 16, Volume 40, Issue 1, January 2022, Pages 137-147 PDF (890.87 K)
DOI: 10.30684/etj.v40i1.2184
Authors
Emad Njim^* ¹; Sadeq H. Bakhi¹; Muhannad Al-Waily²
¹University of Technology-Iraq, Alsina’a street, 10066 Baghdad, Iraq.
²University of Kufa, Najaf, Iraq.
Abstract
Functionally graded porous materials (FGPMs) are porous structures with a porosity gradient distributed over the entire volume. They have many applications in the aerospace, marine, biomedical, automotive, and shipbuilding industries. High strength to weight and excellent energy absorption is the most important features that make these structures unique. In this paper, the flexural properties of simply-supported sandwich beams with functionally graded porous core under flexural load were evaluated experimentally and numerically based on various parameters. A three-point bending test for 3D printed sandwich specimens with porous metal core bonded with aluminum face sheets using various porosity parameters and core heights has been performed to measure the peak load and maximum deflection and explore the sandwich structure's strength. To validate the accuracy of the experimental solution, a finite element analysis (FEA) is carried out using ANSYS 2021 R1 software. Tests and FEM show that the sandwich beam behavior is closely related to porosity, power-law index, and FG porous metal core thicknesses. Experimental results indicated that at a porosity ratio of 10 %, FG core height 10 mm the maximum bending load was 573 N and maximum deflection 13.8 mm respectively. By increasing porosity to become 30% using the same geometrical parameters, the bending load was reduced by 15.4 % while the deflection exhibited a 1.4 % increase. The Numerical results for the three-point bending are compared with experimental measurements, showing a fair agreement with a maximum discrepancy of 15%.
Highlights
A novel of sandwich beam made of FG polymer porous core and homogenous skins. Flexural properties of FPGM sandwich beams. Effects of changing the core thickness and porosity parameters on the FGM beam. Used experimental work and the finite element method (FEM). FGPMs are crucial components of various engineering applications.
Keywords
Sandwich beam; Functionally graded porous materials; PLA core; Three-point Bending; FEA

References
[1] E. K. Njim, M. Al-Waily, and S. H. Bakhy, A Critical Review of Recent Research of Free Vibration and Stability of Functionally Graded Materials of Sandwich Plate, IOP Conference Series: Materials Science and Engineering, 1094 (2021), Baghdad, Iraq. [2] M. Naebe and K. Shirvanimoghaddam, Functionally graded materials: A review of fabrication and properties, Applied materials today, 5 (2016) 223–245. [3] D. K. Jha, T. Kant, R. K. Singh, A critical review of recent research on functionally graded plates, Composite Structures,. 96 (2013) 833–849. [4] H. Lazreg, H. A. Atmane, T. Abdelouahed, M. Ismail, and E. Bedia, Free vibration of functionally graded sandwich plates using four-variable refined plate theory, Applied Mathematics and Mechanics, 32 (2011) 925–942. [5] Y. Kiani, E. Bagherizadeh and M. R. Eslami, Thermal and mechanical buckling of sandwich plates with FGM face sheets resting on the Pasternak elastic foundation, Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 226 (2011) 32-41. [6] T. Anderson, A 3-d elasticity solution for a sandwich composite with functionally graded core subjected to transverse loading by a rigid sphere, Composite Structures, 60 (2003). [7] A. Shahistha, B. Varghese, and A. Baby, A review on functionally graded materials, The International Journal of Engineering and Science, 3 (2014) 90-101. [8] Y. Q. Wang, J. W. Zu, Vibration behaviors of functionally graded rectangular plates with porosities and moving in thermal environment, Aerospace Science and Technology, 69 (2017) 550-562. [9] S. E. Sadiq, M. J. Jweeg, and S. H. Bakhy, Strength analysis of aircraft sandwich structure with a honeycomb core: Theoretical and Experimental Approaches, Engineering and Technology Journal, 39 (2021) 153-166. [10] X.R. Wu, H.J. Yu, and L.C Guo, “Experimental and numerical investigation of static and fatigue behaviors of composites honeycomb sandwich structure,” Compos. Struct. 213 (2019) 165–172. [11] E. K. Njim, M. Al-Waily, and S. H. Bakhy, A Review of the Recent Research on the Experimental Tests of Functionally Graded Sandwich Panels, Journal of Mechanical Engineering Research and Developments, 44 (2021) 420-441. [12] L. Jing, X. Su, D. Chen, F. Yang, and L. Zhao, Experimental and numerical study of sandwich beams with layered-gradient foam cores under low-velocity impact, Thin-Walled Structures, 135 (2019) 227-244. [13] Z. Huang, Y. Zhou, G. Hu, W. Deng, H. Gao, L. Sui, Flexural resistance and deformation behavior of CFRP-ULCC-steel sandwich composite structures, Composite Structures, 257 (2021). [14] M. Kazemi, Experimental analysis of sandwich composite beams under three-point bending with an emphasis on the layering effects of foam core, 29 (2021) 383-391. [15] A. A. Daikh and A.M. Zenkour, Effect of porosity on the bending analysis of various functionally graded sandwich plates, Materials Research Express, 6 (2019). [16] B.V Sankar, An elasticity solution for functionally graded beams, Compos Sci Technol, 61 (2001) 689–696. [17] Z. Zhong and T. Yu, Analytical solution of a cantilever functionally graded beam, Compos Sci Technol, 67 (2007) 481–488. [18] Y. A. Kang and XF. Li, Bending of functionally graded cantilever beams with power-law non-linearity subjected to an end force, Int J Non Linear Mech., 102 (2009) 696–703. [19] N. Gupta and E. Woldesenbet, Microscopic Studies of Syntactic Foams Tested Under Three-Point Bending Conditions, American Society of Mechanical Engineers, 1 (2002) 147-152. [20] K. Ravi and S. Sankaran, Three-Point Bend Test Study in Syntactic Foam. Part III: Effects of Interface Modification on Strength and Fractographic Features, Journal of Applied Polymer Science, 98 (2005) 687-693. [21] A. F. Avila, Failure mode investigation of sandwich beams with functionally graded core, Composite Structures, 81 (2007) 323-330. [22] C. S. Karthikeyan, S. Sankaran, and Kishore, Influence of chopped strand fibres on the flexural behavior of a syntactic foam core system, Polymer International, 49 (2000) 158-162. [23] C.S. Karthikeyan, S. Sankaran, and Kishore, Investigation of bending modulus of fiber reinforced syntactic foams for sandwich and structural applications, Polymers for Advanced Technologies, 18 (2007) 254-256. [24] X. Wu, H. Yu, L. Guo, L. Zhang, X. Sun, Z. Chai, Experimental and numerical investigation of static and fatigue behaviors of composites honeycomb sandwich structure, Compos. Struct. 213 (2019) 165–172. [25] N. Gupta, E. Woldesenbet, Characterization of Flexural Properties of Syntactic Foam Core Sandwich Composites and Effect of Density Variation, Journal of Composite Materials; 39 (2005) 2197-2212. [26] J. Hohe, V. Hardenacke, V. Fascio, Y. Girard, J. Baumeister, K. Stöbener, J. Weise, D. Lehmhus, S. Pattofatto, H. Zeng, H. Zhao, V. Calbucci, F. Rustichelli, and F. Fiori, “Numerical and experimental design of graded cellular sandwich cores for multifunctional aerospace applications, Journal of Materials and Design, 39 (2012) 20–32. [27] A. Garg, H.D. Chalak, and A. Chakrabarti, Comparative study on the bending of sandwich FGM beams made up of different material variation laws using refined layerwise theory, Mechanics of Materials, 151(2020). [28] L. Jing, X. Su, D. Chen, F. Yang, L. Zhao, Experimental and numerical study of sandwich beams with layered-gradient foam cores under low-velocity impact, Thin-Walled Structures, 135(2019) 227-244. [29] A. Seyedkanani, H. Niknam, and A. H. Akbarzadeh, “Bending behavior of optimally graded 3D printed cellular beams,” Additive Manufacturing, 35(2020). [30] M. Bocciarelli, G. Bolzon, and G. Maier, Three-Point-Bending and Indentation Tests for the Calibration of Functionally Graded Material Models by Inverse Analysis, In: Motasoares C.A. et al. (eds) III European Conference on Computational Mechanics. Springer, Dordrecht, (2006). [31] L. Czechowski, Study on Strength and Stiffness of WC-Co-NiCr Graded Samples, Materials (Basel), 12 (2019). [32] J. Zhou, Z.W. Guan, and W.J. Cantwell, The impact response of graded foam sandwich structures, Composite Structures, 97 (2013) 370–377. [33] S. Natarajan and G. Manickam, Bending and vibration of functionally graded material sandwich plates using an accurate theory, Finite Elements in Analysis and Design, 57 (2012) 32-42. [34] Sh. H. H., H. R. D. Taher, H. Akhavan, M. Omidi, Free Vibration of Functionally Graded Rectangular Plates Using First-Order Shear Deformation Plate Theory, Journal of Applied Mathematical Modelling, 34(2010) 1276- 1291. [35] N. Wattanasakulpong and A. Chaikittiratana, Flexural vibration of imperfect functionally graded beams based on Timoshenko beam theory: Chebyshev collocation method, Mechanical, 50 (2015) 1331-1342. [36] D. Lukkassen and A. Meidell, Advanced materials and structures and their fabrication processes, Book manuscript, Narvik University College, HiN, (2007). [37] M. M. Hanon, R. Marczis, and L. Zsidai, Influence of the 3D Printing Process Settings on Tensile Strength of PLA and HT-PLA, Periodica Polytechnica Mechanical Engineering, 65 (2021) 38–46. [38] R. T. Luiz Ferreira, I. C. Amatte, T. A. Dutra, and D. Bürger, Experimental characterization and micrograph of 3D printed PLA and PLA reinforced with short carbon fibers, Composites Part B: Engineering, 124 (2017) 88–100. [39] L. Wang, W. M. Gramlich, and D. J. Gardner, Improving the impact strength of Poly(lactic acid) (PLA) in fused layer modeling (FLM), Polymer, 114 (2017) 242–248. [40] A. Z. Mahdi, S. A. Amin, and S. H. Bakhy, Influence of Refill Friction Stir Spot Welding Technique on the Mechanical Properties and Microstructure of Aluminum AA5052 and AA6061-T3, 3rd International Conference on Engineering Sciences, IOP Conference Series: Materials Science and Engineering, 671(2020). [41] B. R. L. Yadhav, H.K. Govindaraju, M.D. Kiran, and B. Suresha, Three-point bending and impact behavior of carbon/epoxy composites modified with titanium dioxide nanoparticles, Materials Today: Proceedings, (2020). [42] ASTM Standards, Standard Test Method for Flexural Properties of Sandwich Constructions, C 393 – 00,( 2005). [43] S. E. Sadiq, S. H. Bakhy, and M. J. Jweeg, The Effects of Honeycomb Parameters on Transient Response of an Aircraft Sandwich Panel Structure, 2nd International Scientific Conference of Al-Ayen University (ISCAU-2020), IOP Conference Series: Materials Science and Engineering, 928(2020). [44] M. J. Jweeg, M. Al-Waily, A. K. Muhammad, K. K. Resan, Effects of Temperature on the Characterization of a New Design for a Non-Articulated Prosthetic Foot, IOP Conference Series: Materials Science and Engineering, 433 (2018), 2nd International Conference on Engineering Sciences. [45] S. Farah, D. G. Anderson, and R. Langer, Physical and Mechanical Properties of PLA, and their functions in widespread applications - A comprehensive Review, Advanced Drug Delivery Reviews, 107 (2016) 367–392.
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