Determination of the angle of repose of hard metal granules

Just, Marvin; Peschiutta, Alexander Medina; Hippe, F.; Useldinger, Ralph; Baller, Jörg

doi:10.1016/j.powtec.2022.117695

Cited by 10 publications

(3 citation statements)

References 38 publications

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“…A novel approach described in detail in [16] is employed to measure the angle of repose. The measurement device comprises a funnel with a 2 mm orifice and a movable plate below the funnel.…”

Section: Experimental Methods Materialsmentioning

confidence: 99%

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Maximum in Mass Flow Rates of Hard Metal Granules through Circular Orifices in Relation to the Angle of Repose

Just,

Medina Peschiutta,

Useldinger

et al. 2023

Euro PM2023 Proceedings

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The mass flow of granular matter through orifices can be described by the well-known Beverloo law. It depends on particle and orifice sizes, interparticle and particle/container interaction forces, particles’ surfaces - to name a few influences on the mass flow rate. We present an experimental study of the flow of a set of ready-to-press (RTP) hard metal powders through orifices of varying diameter. The obtained parameters of the Beverloo law are compared with angle of repose measurements. The interplay between attractive interparticle forces and gravitational forces are discussed for both types of experimental measurements and related to the difference between particle and orifice size.

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Section: Experimental Methods Materialsmentioning

confidence: 99%

“…Granular characteristics of sieved samples, values from[16] and completed with information from[17].…”

mentioning

confidence: 99%

Maximum in Mass Flow Rates of Hard Metal Granules through Circular Orifices in Relation to the Angle of Repose

Just,

Medina Peschiutta,

Useldinger

et al. 2023

Euro PM2023 Proceedings

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“…Numerous methods are used to measure flowability, such as the granular friction analyzer [44,45], hall flow meter [46], and angle of repose [47], etc. For the purpose of this study, flowability was measured by determining the angle of repose (Figure 1).…”

Section: Flowabilitymentioning

confidence: 99%

Experimental Evaluation of a Granular Damping Element

Avdić,

Nagode,

Klemenc

et al. 2024

Polymers

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Due to their advantages—longer internal force delay compared to bulk materials, resistance to harsh conditions, damping of a wide frequency spectrum, insensitivity to ambient temperature, high reliability and low cost—granular materials are seen as an opportunity for the development of high-performance, lightweight vibration-damping elements (particle dampers). The performance of particle dampers is affected by numerous parameters, such as the base material, the size of the granules, the flowability, the initial prestress, etc. In this work, a series of experiments were performed on specimens with different combinations of influencing parameters. Energy-based design parameters were used to describe the overall vibration-damping performance. The results provided information for a deeper understanding of the dissipation mechanisms and their mutual correlation, as well as the influence of different parameters (base material, granule size and flowability) on the overall damping performance. A comparison of the performance of particle dampers with carbon steel and polyoxymethylene granules and conventional rubber dampers is given. The results show that the damping performance of particle dampers can be up to 4 times higher compared to conventional bulk material-based rubber dampers, even though rubber as a material has better vibration-damping properties than the two granular materials in particle dampers. However, when additional design features such as mass and stiffness are introduced, the results show that the overall performance of particle dampers with polyoxymethylene granules can be up to 3 times higher compared to particle dampers with carbon steel granules and conventional bulk material-based rubber dampers.

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