Dynamic Performance of Laminated High-Damping and High-Stiffness Composite Structure Composed of Metal Rubber and Silicone Rubber

Abstract

In this study, a laminated composite damping structure (LCDS) with metal rubber (MR) as matrix and silicone rubber (SR) as reinforcement has been designed. The embedded interlocking structure formed by the multi-material interface of the LCDS can effectively incorporate the high damping characteristics of traditional polymer damping materials and significantly enhance the adjustable stiffness of the damping structure. Based on the periodic cyclic vibration excitation, dynamic tests on different laminated structures were designed, and the damping performance and fatigue characteristics under periodic vibration excitation of the LCDS, based on MR and SR, were explored in depth. The experimental results exhibited that, compared to single-compound damping structures, the LCDS with SR as reinforcement and MR as matrix has excellent stiffness and damping characteristics. The incorporation of the silicon-based reinforcement can significantly improve the performance of the entire structure under cyclic fatigue vibration. In particular, the effects of material preparation and operating parameters on the composite structure are discussed. The effects of MR matrix density, operating frequency, amplitude, and preload on the stiffness and damping properties of the MR- and SR-based LCDS were investigated by the single factor controlled variable method. The results demonstrated that the vibration frequency has little effect on the LCDS damping performance. By increasing the density of the MR matrix or increasing the structural preload, the energy dissipation characteristics and damping properties of the LCDS can be effectively improved. With the increase in vibration excitation amplitude, the energy consumption of the LCDS increases, and the average dynamic stiffness changes at different rates, resulting in the loss factor decreasing first and then increasing. In this study, a damping structure suitable for narrow areas has been designed, which overcomes the temperature intolerance and low stiffness phenomena of traditional polymer rubber materials, and provides effective guidance for the design of damping materials with controllable high damping and stiffness.

Fabrication of a durable anti-icing composite coating based on polyurethane elastomer and silica nanoparticles

“…The externally mechanical energy can be dissipated in the thermal energy state by the mutual friction between the Si-PUE molecules when the elastic coating presents a cyclical movement of stretching and retraction. Finally, it can be expected to achieve the purpose of greatly reducing mechanical vibrations and abrasions [48,49].…”

Preparation of High-Strength and Excellent Compatibility Fluorine/Silicone Rubber Composites under the Synergistic Effect of Fillers

“…Rubber products are widely used in automobiles, construction, electrical appliances, medical equipment, and other fields. − Rubber materials and rubber composites have always been the focus of research. − Among other things, rubber materials in applications are subject to changing with environmental changes, such as high temperature, low temperature, acid–base, oily and organic media, and so forth, leading to changes in the properties of rubber materials and thus limiting their use. − At present, the above problems can be effectively solved by combining two or more rubbers or other materials through physical and chemical actions. , Previous studies have made significant progress in improving the properties of rubber composites. , In rubber composites, one kind of rubber is used as the matrix material, and it is a common method for researchers to select different auxiliary materials for composites. The selection of synergistic materials involves the design and preparation of materials, which can be another rubber or filler. , …”

“… 1 − 4 Rubber materials and rubber composites have always been the focus of research. 5 − 7 Among other things, rubber materials in applications are subject to changing with environmental changes, such as high temperature, low temperature, acid–base, oily and organic media, and so forth, leading to changes in the properties of rubber materials and thus limiting their use. 8 − 10 At present, the above problems can be effectively solved by combining two or more rubbers or other materials through physical and chemical actions.…”

Finite Element Solution for Dynamic Mechanical Parameter Influence on Underwater Sound Absorption of Polyurethane-Based Composite

“…Over recent decades, sound absorption layers attached to ships have been gradually utilized to reduce the transmission of underwater sound, which could availably increase the sound wave absorption and thus isolate the noise inside ships as well as suppress the ship vibration [ 11 , 12 , 13 , 14 ]. Currently, damping materials are most commonly utilized as sound absorption layers to reduce vibration and sound noise, which include viscoelastic materials, composites, metal, and intelligent damping materials [ 15 ]. Among them, viscoelastic materials display the most typical damping materials and possess excellent damping performances [ 16 , 17 , 18 , 19 , 20 ] because, compared to other damping materials, their characteristic impedance is close to that of water, so they can convert vibration and sound energy to heat energy significantly [ 21 , 22 ].…”