Enhanced vibration and damping characteristics of novel corrugated sandwich panels with polyurea-metal laminate face sheets

In this paper, cement based on fused silica powder @ polyurethane urea (FSP@PUU) with a micro constrained damping structure was studied. Firstly, FSP@PUU core-shell particles were prepared by heterogeneous stepwise addition polymerization method and added into cement paste as damping filler to form a micro-constrained damping structure inside cement paste. The mechanical property and damping performance of cement-based composites were characterized by compressive strength, dynamic mechanical analysis (DMA) test and modal vibration test. The results showed that the damping performance of FSP @ PUU cement-based composites was affected by temperature, and the loss tangent of cement with 6wt% FSP@PUU increased to about 0.057 at −35 °C to 35 °C, which was 1.5 times cement paste within the glass transition temperature. With 6 wt% FSP@PUU, the damping ratio of cement-based composites increased by 58% compared with cement paste in the frequency range of 175–300 Hz, while the compressive strength decreased by only 5%. The cement with suitable FSP@PUU possesses excellent damping performance.

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“…The tests were performed between −30 °C and −35 °C at a fixed frequency of 1 Hz, and the heating rate was 2 °C/min. Storage modulus

, loss modulusd

and loss tangent

were obtained [ 20 ].…”

Section: Methodsmentioning

confidence: 99%

Preparation and Evaluation Mechanic Damping Properties of Fused Silica Powder@Polyurethane Urea/Cement Composites

et al. 2022

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“…While the adhesive layers presumably reduce the stiffness of LLM parts, the damping can be expected to increase. It has already been found that hybrid machine elements lead to considerable increases in part damping by combining steel and composites [24][25][26]. However, the damping of machines is mainly dominated by the motor and friction effects in connection interfaces [1,23].…”

Section: Damping Behaviormentioning

confidence: 99%

Hybrid manufacturing of topology optimized machine tool parts through a layer laminated manufacturing method

Helfesrieder

Neubauer

Lechler

et al. 2021

Prod. Eng. Res. Devel.

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Load-oriented lightweight structures are commonly designed based on topology optimization. For machine tool parts, they enable the reduction of moving masses and therefore increase the resource and energy efficiency of production systems. However, this usually results in complex part structures that are difficult or impossible to produce using conventional manufacturing methods. In this paper, a hybrid layer laminated manufacturing (LLM) method is proposed enabling manufacturing of topology-optimized machine tool parts. The method is referred to as hybrid, as the subtractive structuring of metal sheets is combined with the additive joining of the sheets by adhesive bonding. This enables enclosed inner cavities without support structures, which are used to approximate the optimal density distribution from a topology optimization via manufacturing. The proposed LLM method is validated on the basis of a bearing block of a ball screw feed drive. A experimental study in the time and frequency domain on a test rig confirms the principle suitability of the LLM method for the production of industrial applicable lightweight components.

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“…They investigated the effects of some system's geometrical parameters, such as panel thickness, core radius on the natural frequencies of the structure. Wang et al 11 considered the vibration and damping behaviors of novel corrugated sandwich panels with polyurea-metal laminate face sheets using the combined finite element modal strain energy method. Based on their research, it was figured out that by tailoring the polyurea layer thickness and the distribution of polyurea layers, the capacity of the 1 sandwich panel in passive vibration suppression could be more enhanced.…”

Section: Introductionmentioning

confidence: 99%

An experimental and numerical study on the vibration characteristics of glass fiber composite sandwich panel with lattice cores

Eratbeni

Azadi

Seyyedi

2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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This research aims to design, manufacture, and determine the vibration characteristics of a composite sandwich panel with lattice cores. For this purpose, first, a glass fiber sandwich panel with lattice truss core has been fabricated in the laboratory. In this part, the vacuum-assisted resin transfer molding method has been used to achieve laminates without any porosity. Afterward, the modal tests have been performed to obtain the natural frequencies, shape modes, damping ratio, and frequency responses of the sandwich panel. In addition, a finite element analysis has been developed to calculate the natural frequencies, damping ratio, and mode shapes of the composite sandwich panel. Then the experimental data have been compared to numerical simulation, and good agreement has been found.

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Enhanced vibration and damping characteristics of novel corrugated sandwich panels with polyurea-metal laminate face sheets

Cited by 31 publications

References 36 publications

Preparation and Evaluation Mechanic Damping Properties of Fused Silica Powder@Polyurethane Urea/Cement Composites

Preparation and Evaluation Mechanic Damping Properties of Fused Silica Powder@Polyurethane Urea/Cement Composites

Hybrid manufacturing of topology optimized machine tool parts through a layer laminated manufacturing method

An experimental and numerical study on the vibration characteristics of glass fiber composite sandwich panel with lattice cores

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