Comparison of Static and Dynamic Powder Compaction: Experiment and Simulation

Braun, C.; Schumaker, Merit G.; Rice, James A.; Borg, John P.

doi:10.1115/1.4031615

Cited by 6 publications

(5 citation statements)

References 24 publications

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“…where m -the mass of the vibration machine; c -the reduced rigidity of the damper and the rubber seals; F -the area of the form face wall adjacent to the compacted composite material; L -the distance between the form face walls (the thickness of the compacted layer). The first boundary condition (5) describes the interaction between the vertical plate and the compacted composite material and the second boundary condition (6) shows that the form face walls move synchronously. Based on function (4), expression t Q ω sin in boundary condition (5)…”

Section: The Materials and Results Of The Researchmentioning

confidence: 99%

“…Substituting integration constant D (24) into dependence (13), we find the solution to the oscillation wave equation 3, meeting boundary conditions (5) and (6), in a complex form: iS R + , conjugate with complex numbers in the denominator and, singling the imaginary part of the formed complex function out of the obtained dependence and transforming it, we obtain the desired solution of the wave equation (3), meeting boundary conditions (5) and (6), in the following form: where ϕ -the shift of phases between the amplitude of the exciting force and motion,…”

Section: The Materials and Results Of The Researchmentioning

confidence: 99%

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The research of the parameters of a vibration machine for composite materials compaction

Maslov

Batsaikhan²

2018

MATEC Web Conf.

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Based on the analysis of the conventional methods for composite materials compaction, the authors propose a vibration machine made as a form without bottom with a horizontal oscillation vibro-exciter mounted on its end face. To determine the rational parameters of the vibration machine we researched the “vibration form – composite medium” dynamic system wherein composite medium is represented in the form of a system with distributed parameters. This system takes into account the resilient, viscous, inertia and power properties of the compacted composite material. We formulated a partial differential equation describing the variation of stresses in the compacted medium depending on the dynamic module of resilient deformation, the coefficient of dynamic viscosity, the coefficient of non-resilient resistance and the compacted medium inertia in the functional dependence on the composite material density and relative deformation. We formulated an oscillation wave equation describing the propagation of the viscous-resilient-plastic waves of deformation in the compacted composite material. The solution of the oscillation wave equation resulted in the formulation of the law of the oscillation of the form and the compacted material. We determined the stresses occurring in the composite material. We obtained the relations for the determination of the vibration machine basic parameters depending on the physical and mathematical characteristics of the compacted composite material.

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Section: The Materials and Results Of The Researchmentioning

confidence: 99%

Section: The Materials and Results Of The Researchmentioning

confidence: 99%

The research of the parameters of a vibration machine for composite materials compaction

Maslov

Batsaikhan²

2018

MATEC Web Conf.

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“…The first, which is the indirect method, includes high-velocity impact of a flyer plate or piston against the powder particles placed in the die. This method is implemented in a one- or two-stage light gas-gun device, 16–19 a drop hammer apparatus, 7,20,21 and a commercial hydraulic machine. 14,22–24 Indirect shock compaction method includes dissipation of shock energy because of an existing intermediate material between powder container and shock wave source.…”

Section: Shock Compaction Techniquementioning

confidence: 99%

Modeling and prediction of metallic powder behavior in explosive compaction process by using genetic programming method based on dimensionless numbers

Alitavoli

Khaleghi

Babaei

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part E:

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Explosive compaction process of metallic powders has been studied using a semi-empirical method. This method utilizes dimensional analysis along with genetic programming approach to obtain an expression relating the final density of compacts to the effective parameters during compaction process such as shock compaction energy, properties of metallic powder, and geometry of the problem and explosive charge. Dimensionless numbers have been constructed based on the effective parameters using a complete set of input–output experimental data. The obtained dimensionless numbers then have been applied as input–output data pairs for genetic programming optimization process considering modeling error as the objective. The obtained results show that the proposed model using dimensional analysis method along with genetic programming can predict the final density of compacts with 99.8% accuracy. Also, the outputs of the proposed model have been compared with those obtained by group method of data handling type neural network in the literature. Consequently, genetic programming method has much less root mean square error than group method of data handling model and can be successfully used for modeling and prediction of the complex process behavior.

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“…Powder compaction technology, which is generally called powder metallurgy (PM), has advanced significantly over the past decades [5][6][7][8]. This process can be considered as an alternative, lower cost process compared to other similar metal working technologies and provide cost-effective, but higher quality product [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Effect of Sintering Temperature and Aluminum Concentration on the Hardness, Microstructure and Density of Copper-Aluminum Alloys

Slimani¹,

Souigat²,

Gheriani³

et al. 2021

J. Nano- Electron. Phys.

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In recent decades, powder metallurgy technology has advanced considerably and been used to manufacture sintered structural components with extremely high dimensional accuracy and excellent surface finish. This process is based on the compression of a mixture of metal powder and sintering in an oven using controlled temperature and atmosphere. This technology meets copper alloys design with excellent mechanical properties at the lowest cost. This prompted us to study the effect of sintering temperature and aluminum concentration on the hardness, microstructure, and density of copper-aluminum (Cu-Al) alloys prepared by using the powder compaction process. In this work, samples of Cu-Al alloy with 5, 11, 14, and 18 wt. % of Al were prepared by mechanical alloying of elemental powders, followed by consolidation under a pressure of 12.5 MPa and sintering at 700-1000 C in vacuum for 90 min. Microstructural constituents were examined using X-ray diffraction. Density and hardness were measured and their changes with the size of the granules and the formed phases were studied. The 2 phase samples showed higher hardness.

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Comparison of Static and Dynamic Powder Compaction: Experiment and Simulation

Cited by 6 publications

References 24 publications

The research of the parameters of a vibration machine for composite materials compaction

The research of the parameters of a vibration machine for composite materials compaction

Modeling and prediction of metallic powder behavior in explosive compaction process by using genetic programming method based on dimensionless numbers

Effect of Sintering Temperature and Aluminum Concentration on the Hardness, Microstructure and Density of Copper-Aluminum Alloys

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