Experimental Investigation for Forced Vibration of Honeycomb Sandwich Beams
The present paper deals with vibration analysis of laminated sandwich beams made of Honeycomb cores. An experimental investigation of two sandwich beams made of Aluminum and Nomex cores is proposed. The vibration tests were performed for clamped-free boun
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Abstract The present paper deals with vibration analysis of laminated sandwich beams made of Honeycomb cores. An experimental investigation of two sandwich beams made of Aluminum and Nomex cores is proposed. The vibration tests were performed for clamped-free boundary conditions using forced vibration method. A series of measurements varying excitation and response points are carried out. Experimental results have been presented leading to perform the vibration characteristics of Honeycomb sandwich beams in terms of natural frequencies, damping factors and vibration amplitudes. Keywords Honeycomb investigation
Sandwich Beam Forced vibration Experimental
1 Introduction Sandwich materials (Berthelot 1992; Reddy 1997) have shown considerable potential in different engineering applications such as aerospace, automobile, nuclear, marine, biomedical and civil engineering. This is due to its high strength and high stiffness to weight ratio, good resistance to fatigue and corrosion phenomenon. In fact, there are attempts to replace components with classical materials (steel, concrete) by laminated materials especially sandwich materials made of Honeycomb cores. Honeycomb sandwich constructions offers, hence, the development of new materials with lightweight, high flexural stiffness and high vibration control especially with the increase of high performance industrial requirements. S. Zghal (&) R. Nasri Applied Mechanics and Engineering Laboratory, National School of Engineers of Tunis (ENIT), University of Tunis El Manar, BP37, 1002, Belvédère, Tunis, Tunisia e-mail: [email protected] R. Nasri e-mail: [email protected] © Springer International Publishing Switzerland 2017 T. Fakhfakh et al. (eds.), Advances in Acoustics and Vibration, Applied Condition Monitoring 5, DOI 10.1007/978-3-319-41459-1_22
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Therefore, knowledge of dynamic behavior of these structures in terms of natural frequencies, damping factor and vibration amplitude is important especially when they incorporated Honeycomb cores. Numerous studies for dynamic analysis of sandwich beams have been reported in the literature (Di Taranto 1965; Mead and Markus 1969; Mindlin and Goodman 1950; Cowper 1968; Banerjee 2001, 2004; Nilsson and Nilsson 2002; Bickford 1982; Heyliger and Reddy 1988; Marur and Kant 1996; Subramanian 2006; Damanpack and Khalili 2012; Carrera et al. 2013; Grygorowicz et al. 2015) but not much paper has reported with Honeycomb cores. In fact, Di Taranto (1965) and Mead and Markus (1969) are the earliest investigators who studied the forced vibration of sandwich beams using the classical (Euler Bernoulli) theory. Then, other researchers (Mindlin and Goodman 1950; Cowper 1968; Banerjee 2001, 2004; Nilsson and Nilsson 2002) have analyzed the vibration characteristics of sandwich beams using Timoshenko theory to take into account the effect of shear deformations. In recent years, many scientists have investigated vibration analysis of sandwich beams using High order theory. Some of these investig
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