Abstract
This paper studies the stress and displacement distributions of functionally graded beam with continuously varying thickness, which is simply supported at two ends. The Young’s modulus is graded through the thickness following the exponential-law and the Poisson’s ratio keeps constant. On the basis of two-dimensional elasticity theory, the general expressions for the displacements and stresses of the beam under static loads, which exactly satisfy the governing differential equations and the simply supported boundary conditions at two ends, are analytically derived out. The unknown coefficients in the solutions are approximately determined by using the Fourier sinusoidal series expansions to the boundary conditions on the upper and lower surfaces of the beams. The effect of Young’s modulus varying rules on the displacements and stresses of functionally graded beams is investigated in detail. The two-dimensional elasticity solution obtained can be used to assess the validity of various approximate solutions and numerical methods for the aforementioned functionally graded beams.
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References
Kiebacka B, Neubrand A, Riedel H (2003) Processing techniques for functionally graded materials. Mater Sci Eng A 362:81–106
Zhu H, Sankar BV (2004) A combined Fourier series-Galerkin method for the analysis of functionally graded beams. ASME J Appl Mech 71:421–424
Sankar BV (2001) An elasticity solution for functionally graded beams. Compos Sci Technol 61:689–696
Sankar BV, Tzeng JT (2002) Thermal stresses in functionally graded beams. AIAA J 40:1228–1232
Venkataraman S, Sankar BV (2003) Elasticity solution for stresses in a sandwich beam with functionally graded core. AIAA J 41:2501–2515
Ying J, Lü CF, Chen WQ (2008) Two-dimensional elasticity solutions for functionally graded beams resting on elastic foundations. Compos Struct 84:209–219
Lü CF, Chen WQ, Xu RQ, Lim CW (2008) Semi-analytical elasticity solutions for bidirectional functionally graded beams. Int J Solids Struct 45:258–275
Chakraborty A, Gopalakrishnan S, Reddy JN (2003) A new beam finite element for the analysis of functionally graded materials. Int J Mech Sci 45:519–539
Kadoli R, Akhtar K, Ganesan N (2008) Static analysis of functionally graded beams using higher order shear deformation theory. Appl Math Modell 32:2509–2525
Ke LL, Wang J, Kitipornchai S (2010) An analytical study on the nonlinear vibration of functionally graded beams. Meccanica 45:743–752
Thuc PV, Huu TT, Trung KN, Fawad I (2014) Static and vibration analysis of functionally graded beams using refined shear deformation theory. Meccanica 49:155–168
Zhong Z, Yu T (2007) Analytical solution of a cantilever functionally graded beam. Compos Sci Technol 67:481–488
Zhong Z, Yu T (2006) Two-dimensional analysis of functionally graded beams. AIAA J 44:3160–3174
Ding HJ, Huang DJ, Chen WQ (2007) Elasticity solutions for plane anisotropic functionally graded beams. Int J Solids Struct 44:176–196
Huang DJ, Ding HJ, Chen WQ (2007) Analytical solution for functionally graded magneto-electro-elastic plane beams. Int J Eng Sci 45:467–485
Huang DJ, Ding HJ, Chen WQ (2010) Static analysis of anisotropic functionally graded magneto–electro-elastic beams subjected to arbitrary loading. Eur J Mech A Solids 29:356–369
Lee SY, Ke HY, Kuo YH (1990) Exact static deflection of a non-uniform Bernoulli-Euler beam with general elastic end restraints. Comput Struct 36:91–97
Romano F, Zingone G (1992) Deflection of beams with varying rectangular cross-section. J Eng Mech 118:2128–2134
Zenkour AM (2002) Elastic behaviour of an orthotropic beam/one-dimensional plate of uniform and variable thickness. J Eng Math 44:331–344
Lee SY, Kuo YH (1993) Static analysis of nonuniform Timoshenko beams. Comput Struct 46:813–820
Romano F (1996) Deflections of Timoshenko beam with varying cross-section. Int J Mech Sci 38:1017–1035
Sapountzakis EJ, Panagos DG (2008) Shear deformation effect in non-linear analysis of composite beams of variable cross section. Int J Non Linear Mech 43:660–682
Xu YP, Zhou D, Cheung YK (2008) Elasticity solution of clamped-simply supported beams with variable thickness. Appl Math Mech 29:279–290
Xu YP, Zhou D (2009) Elasticity solution of multi-span beams with variable thickness under static loads. Appl Math Model 33:2951–2966
Xu YP, Zhou D (2011) Two-dimensional analysis of simply supported piezoelectric beams with variable thickness. Appl Math Model 35:4458–4472
Acknowledgments
The project supported by “The natural science foundation of Jiangsu Province” (No. BK20130822) and China Postdoctoral Science Foundation funded project (No. 2011M501158). The authors also acknowledge the support from the National Natural Science Foundation of China (No. 51179063).
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Xu, Y., Yu, T. & Zhou, D. Two-dimensional elasticity solution for bending of functionally graded beams with variable thickness. Meccanica 49, 2479–2489 (2014). https://doi.org/10.1007/s11012-014-9958-1
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DOI: https://doi.org/10.1007/s11012-014-9958-1