Design Guidelines for Additive Manufactured Particle Dampers: A Review

Ehlers, Tobias; Oel, Marcus; Tatzko, Sebastian; Kleyman, Gleb; Niedermeyer, Jens; Wallaschek, Jörg; Lachmayer, Roland

doi:10.1016/j.procir.2023.03.134

Cited by 4 publications

(1 citation statement)

References 25 publications

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“…[ 10 ] By precisely controlling the structural design variables of composite materials containing closed powder cavities during the LPBF forming process, key parameters such as the density, elastic modulus, damping characteristics, and porosity of the composite material are directly affected. [ 11 ] For acoustic metamaterials, their acoustic properties are influenced by factors such as material density, [ 12 ] elastic modulus, [ 13 ] damping characteristics, [ 14 ] and porosity. [ 15 ] Therefore, the use of LPBF technology to form acoustic metamaterials with metal powder cavities opens up new possibilities for the development and application of acoustic metamaterials.…”

Section: Introductionmentioning

confidence: 99%

Sound Characteristics and Mechanical Properties of Metal Powder Chamber Structures Composite Materials Formed by Laser Powder Bed Fusion

Li,

Guo,

Jiang

et al. 2024

Adv Eng Mater

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Granular damping technology is a widely used method in aerospace and other industries to reduce vibration and noise. However, the technique still faces challenges such as secondary processing, additional structure, single structure, and residual stress. This article introduces a new composite material, the Metal Powder Chamber Structure (MPCS), formed through the laser powder bed fusion (LPBF) technology. The article explores the effects of factors like arrangement mode, volume fraction, and powder chamber diameter on the sound and mechanical properties of MPCS. The study shows that MPCS improves the sound insulation effect of the material and defies the mass law of sound insulation. The sample 4B40 using a body‐centered cubic arrangement has a sound insulation coefficient of 52dB. The sound absorption efficiency curve presents a double peak, and the sample 6F60 exhibits the highest sound absorption efficiency of 0.76. MPCS changes the deformation stage of the material stress‐strain curve, and different MPCS also alters the compression deformation mode of the composite material. By studying the effects of MPCS on sound and mechanical properties, we hope to provide a better and more sustainable solution for vibration and noise reduction.This article is protected by copyright. All rights reserved.

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Section: Introductionmentioning

confidence: 99%

Sound Characteristics and Mechanical Properties of Metal Powder Chamber Structures Composite Materials Formed by Laser Powder Bed Fusion

Li,

Guo,

Jiang

et al. 2024

Adv Eng Mater

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Lachmayer,

Ehlers,

Lippert

2024

Design for Additive Manufacturing

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Mode selective damping behavior of additively manufactured beam structures

Oel,

Kleyman,

Jonkeren

et al. 2024

Prog Addit Manuf

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Additive manufacturing, with its inherent process-related degrees of freedom, offers significant potential for manufacturing high-performance parts. This allows effects to be integrated that enable completely new solution mechanisms for existing conflicting objectives, which means that the degrees of design freedom make it possible to optimize the application-specific behavior of a part. In addition to the thermal or electrical properties, the dynamic behavior of a part can also be optimized, for example. This article focuses on the integration of the particle damping effect, which can contribute significantly to increased part damping. Unfused powder inside the part leads to energy dissipation through impact and friction mechanisms. However, the particle damping effect is not yet fully explored, lacking essential knowledge for application in product design. Therefore, test specimens with particle dampers, manufactured using laser powder bed fusion by laser beam from 1.2709 tool steel, are investigated, with variations in the position and size of the particle-filled cavities. To determine damping, the samples are freely supported and excited with an impulse. The damping ratio is calculated based on the recorded decay behavior. The results show an increase in damping ratio of up to a factor of 70, with the extent of improvement strongly dependent on the cavity’s volume and, crucially, its position relative to the part’s mode shape. A linear relationship between the damping ratio and the displacement of the volume of the cavities of the beams is shown.

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Design Guidelines for Additive Manufactured Particle Dampers: A Review

Cited by 4 publications

References 25 publications

Sound Characteristics and Mechanical Properties of Metal Powder Chamber Structures Composite Materials Formed by Laser Powder Bed Fusion

Sound Characteristics and Mechanical Properties of Metal Powder Chamber Structures Composite Materials Formed by Laser Powder Bed Fusion

Project Examples

Mode selective damping behavior of additively manufactured beam structures

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