Damping in some cellular metallic materials

Golovin, I.S.; Sinning, H.‐R.

doi:10.1016/s0925-8388(03)00241-x

Cited by 71 publications

(30 citation statements)

References 8 publications

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“…Well-known advantages of cellular metals are their excellent ability for energy adsorption [1,2], good damping behaviour [3,4], sound absorption [5], excellent heat insulation [6,7] and a high specific stiffness [8,9]. The combination of these properties opens a wide field of potential applications, i.e.…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis of the flexural properties of sandwich panels with cellular core materials

Fiedler¹,

Öchsner

2008

Materialwissenschaft Werkst

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This paper addresses the flexural properties of sandwich structures with cellular core materials. Experimental three point bending tests are conducted in order to determine the flexural stiffness and the load-carrying capacity of these advanced composites. In addition, the significant failure modes after exceeding the load-carrying capacity are identified. The results of these analyses are compared for sandwich structures containing various core materials. These core materials comprise two aluminium foams, namely M-Pore J and Alporas J , honeycomb structures and novel metallic hollow sphere structures (MHSS).

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Section: Introductionmentioning

confidence: 99%

Experimental analysis of the flexural properties of sandwich panels with cellular core materials

Fiedler¹,

Öchsner

2008

Materialwissenschaft Werkst

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“…Various mechanisms of internal losses accounting for the increased damping of metal foams compared with corresponding dense materials have been proposed. 16) Thermoelastic currents, increased dislocation motion due to a higher stress-strain localisation compared with corresponding dense materials, pump effects of entrapped gas and many more are discussed. However, many aspects of damping mechanisms in metal foams are still not clear.…”

Section: Damping Behaviourmentioning

confidence: 99%

Integral Foam Moulding of Light Metals

Körner¹,

Hirschmann²,

Wiehler³

2006

Mater. Trans.

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Integral foam moulding (IFM) is an economical way to produce castings with integrated cellular structure, i.e. a solid skin and a foamed core. IFM has been known for polymers for more than four decades and is well established in industrial production. Polymer integral foam parts are accepted as a material system with own properties which simplifies designs, reduces production costs and weight, and increases stiffness and overall strength. On the other hand, integral foam moulding for metals is a new field of research. The development of metal based integral foam moulding processes at WTM moves along analogous paths as that of polymers by transferring and adapting successful moulding technologies for polymer integral foam to metals. Two moulding techniques for metal integral foam are presented, a low and a high pressure process. In the low pressure process, the molten metal charged with blowing agent is injected into a permanent steel mould without completely filling it. In this case, the mould gets eventually filled by foam expansion.In the high pressure process foaming is initiated by expansion of the mould cavity after it has been filled completely with the mixture of the metal melt and the blowing agent. The moulded parts are characterized with respect to their cellular structure, density profile and pore size distribution. Mechanical properties such as stiffness and damping behaviour are discussed.

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“…The MHSS represent a relatively new group of cellular metals [1,2] and they combine the well-known advantages of the cellular metals without major scattering of their material parameters as it is observed at foams. Some of these advantages are good properties for energy adsorption [3,4], damping behavior [5], specific stiffness [6], sound adsorption [7,8] and heat insulation [9][10][11]. These properties provide a wide field of potential multi-functional applications, e.g.…”

Section: Introductionmentioning

confidence: 99%

Laser Beam Drilling of Cellular Metals: Numerical Simulation

Araújo

Merkel

Öchsner

2016

Computational Modeling, Optimization and Manufacturing Simulation of Advanced Engineering Materials

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Laser drilling is a highly efficient technique to generate holes in almost any material. It offers an alternative manufacturing method to mechanical drilling and water stream cutting. The relatively small amount of heat involved in the process results in a small heat affected zone. This characteristic makes laser processing interesting for several engineering application. Within this chapter the drilling process is applied to cellular materials. A program code was developed and implemented in order to predict the relation between the initial parameters and the final characteristics of the drilling process, such as depth-time behavior for each amount of initial energy. The simulation of the laser drilling process uses the concept of homogenized cellular materials. It is studied the influence of the heat intensity of the laser in the process. Also the influence of material parameters like thermal conductivity, specific heat and enthalpy are studied. The results of the simulations of the drilling process closely match to the experimental results. The thermal conductivity is of paramount importance for the final results of the laser drilling procedures. The program code can be used for example to the optimization of the laser drilling procedures and to determine or confirm the material properties of the materials as well.

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Damping in some cellular metallic materials

Cited by 71 publications

References 8 publications

Experimental analysis of the flexural properties of sandwich panels with cellular core materials

Experimental analysis of the flexural properties of sandwich panels with cellular core materials

Integral Foam Moulding of Light Metals

Laser Beam Drilling of Cellular Metals: Numerical Simulation

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