Damping of honeycomb sandwich beams

Wang, B; Yang, Mei Yi

doi:10.1016/s0924-0136(00)00564-1

Cited by 49 publications

(24 citation statements)

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“…Honeycomb sandwich materials are being used widely in weight sensitive and damping structures where high flexural rigidity is required, in many fields especially in the automobile industry [1][2][3]. Honeycomb core sandwich panel is formed by adhering two high-rigidity thin-face sheets with a low-density honeycomb core possessing less strength and stiffness.…”

Section: Introductionmentioning

confidence: 99%

A study on composite honeycomb sandwich panel structure

2008

Materials & Design

145

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Section: Introductionmentioning

confidence: 99%

A study on composite honeycomb sandwich panel structure

2008

Materials & Design

145

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“…Therefore, the current findings may seem smaller due to being averaged over a wider frequency range where a number of modes contribute to the response. Damping by cork inserts achieves better efficiency for nearly all filling degrees compared to particles used by Wang and Yang [12]. Their host structure is assembled out of a paper-resin honeycomb core covered by carbon fibre sheets.…”

Section: Comparison With Literaturementioning

confidence: 99%

A sustainable approach of damping treatment for aluminium honeycomb sandwich structures

Monninger

Thite

2018

Proceedings of the Institution of Mechanical Engineers, Part D:

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The damping plays a vital role in structural dynamic and acoustic performance of aluminium honeycomb sandwich structures. The viscoelastic damping treatment of skins is most common. An alternative, the use of sustainable cork inserts to improve the damping of cores and the whole assembly is investigated in this study. Structures with different filling degrees are analysed as well as the optimum location for inserts is determined. The structural dynamic as well as the vibro-acoustic performance is estimated numerically. Average squared displacement amplitude reduction efficiency 2 ̅̅̅̅ ̅̅̅̅̅ is defined as the target parameter for structural dynamic performance, whereas average transmission loss effectiveness ̅̅̅̅̅ for vibro-acoustic performance. The structural dynamic models are validated by experimental vibration analysis, whereas the vibro-acoustic models are validated against published data. Different ways of bonding the inserts to the host structure are analysed in order to maximise damping. The highest improvement is obtained with a filling degree of 64% honeycomb voids and 9.76% increase in mass, for which an average squared displacement amplitude reduction of 35.25% and an average increase in transmission loss of 1.5dB is achieved. The transmission loss increase in relation to the added mass is much higher than that achieved by doubling of mass in the mass law region. The introduction of cork inserts spreads the energy in local modes to a larger space, effectively decreasing the resonance amplitudes. Interestingly, damping does not increase with the number of inserts in a monotonic way and the improvement depends on the spatial distribution of inserts.2

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“…However, the studies to demonstrate the above mentioned factors on the damping loss factor of the honeycomb sandwich FRP composites have been limited. The use of a honeycomb material in a composite laminate is witnessed in aerospace structures, where weight reduction and high flexural rigidity constitute the primary concern in designing structures (Bassani et al 2013, Wang andYang 2000). The FRP composite has a high in-plane stiffness-to-weight ratio, whereas the honeycomb sandwich possesses a high bending stiffness-to-weight ratio, in addition to the high in-plane stiffness to weight ratio (Maheri et al 2008).…”

Section: Introductionmentioning

confidence: 99%

“…More recently, they (Maheri et al 2008) have used the basic laminate theory, together with the Rayleigh-Ritz method, the finite element analysis and the experimental method, to predict damping and frequency of the honeycomb sandwich for space applications and considered the inherent damping of aluminum and carbon fibrereinforced plastic (CFRP) skins in sandwich panels. The damping effect of sandwich beams was also experimentally investigated with fine solder balls inserted in the honeycomb cells, losing the advantage of its light-weight (Wang and Yang (2000)). It was found that the damping was quite effective on measuring the reduction in amplitude from the first two modes of vibration.…”

Section: Introductionmentioning

confidence: 99%