# thermal conductivity of metallic hollow sphere structures

### Laser beam cutting of metallic hollow sphere structures

Jan 01 2012 · Abstract. Laser beam cutting of metallic hollow sphere structures Laserstrahlschneiden von metallischen Hohlkugelstrukturen H. Riegel1 M. Merkel1 A. Ã chsner2 Metallic hollow sphere structures (MHSS) represent a relatively new group of advanced composite materials characterised by high geometry reproduction leading to relatively constant mechanical and

Get Price### (PDF) Prediction of the elastic properties of syntactic

The basic idea of the perforation is to open the inner volume and surface area of the hollow sphere so that for example a gas a liquid or any second phase can better flow through the structure or reinforce the hollow sphere. The thermal properties of these perforated hollow sphere structures (PHSS) were simulated in Refs. 2 3 4 .

Get Price### Finite element analysis of the temperature dependent

In the scope of this study finite element analysis is applied in order to determine the effective thermal conductivity of periodic metallic hollow sphere structures (MHSS). Two different joining technologies for the connection of the hollow spheres namely sintering and adhesive bonding are considered. For the determination of the thermal conductivity of the MHSS the temperature dependence

Get Price### Experimental Investigation and Discrete Element Modelling

V. Marcadon and F. Feyel "Modelling of the compression behaviour of metallic hollow-sphere structures about the influence of their architecture and their constitutive material s equations " Computational Materials Science vol. 47 no. 2 pp. 599–610 2009.

Get Price### FINITE ELEMENT SIMULATION OF ARRAYS OF HOLLOW

thermal conductivity are advantages of these material. Different arrangements and forms of cell structures compose a wide range of cellular materials (Öchsner Augustin 2009). Figure 1.1 shows an example of metallic hollow spheres structure with partial configuration. Figure 1.1 Aluminum profile filled with hollow sphere structures particles

Get Price### Thermal Properties of Hollow Spheres SpringerLink

Abstract. A good knowledge of the thermal properties and more specifically of the thermal conductivity is determinant for a proper materials selection and technical design of real applications using metallic hollow spheres structures (MHSS).

Get Price### Plasticity and damage analysis of metal hollow sphere

May 25 2012 · Plasticity and damage analysis of metal hollow sphere structures under dynamic compressive loading Plasticity and damage analysis of metal hollow sphere structures under dynamic compressive loading Luiz Antônio Bragança da Cunda Branca Freitas de Oliveira Guillermo Juan Creus 00 00 00 PurposeAs compared with homogeneous metals and alloys cellular metals

Get Price### Numerical Simulation of Sintered Perforated Hollow Sphere

Hollow sphere structures (HSS) are novel lightweight ma terials within the group of cellular metals (such as metal foams) which are characterised by high specific stiffness the ability to absorb high amounts of energy at a rel atively low stress levels potential for noise control vi bration damping and thermal insulation cf. Fig. 1.

Get Price### Numerical and experimental analysis of the thermal

Using the TPS method the thermal conductivities of a variety of metallic hollow sphere structures (MHSS) were measured. The thermal conductivities were also calculated using Misnar s analytical model and compared to the experimental results with good agreement between the two sets of data. Numerical and experimental analysis of the thermal conductivity of metallic hollow sphere structures

Get Price### Recent advances in the prediction of the thermal CORE

The effective thermal conductivity of Syntactic Metallic Hollow Sphere Structures (MHSS) was tested by making use of three different approaches such as Finite Element Method and a Lattice Monte Carlo Method and an analytic Maxwell model.

Get Price### Thermal transport in hollow metallic microlattices APL

Oct 09 2019 · The effective thermal conductivity of hollow nickel microlattices with 99.9 porosity and 1 µ m layer thickness is as low as 0.049 W m −1 K −1 at 320 K and increases to 0.075 W m −1 K −1 at 480 K an increase we attribute to internal thermal radiation.

Get Price### Numerical analyses of the thermal conductivity of CORE

This paper presents Lattice Monte Carlo (LMC) and Finite Element (FE) analyses on the effective thermal conductivity of sintered Metallic Hollow Spheres Structures (MHSS). A novel analysis technique applying LMC permits the utilisation of large high resolution models and can be based on Computed Tomography (CT) images.

Get Price### Experimental Study on Thermal Properties of Hollow Sphere

Experimental analyses are performed to determine thermal conductivity thermal diffusivity and volumetric specific heat with transient plane source method on hollow sphere structures. Single-sided testing is used on different samples and different surfaces. Results dependency on

Get Price### Thermal conductivity of metallic hollow sphere structures

May 31 2009 · Thermal conductivity of metallic hollow sphere structures An experimental analytical and comparative study 1. Introduction. Hollow spheres structures (HSS) are an interesting kind of cellular metallic materials constituted by 2. Materials and models. As

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Apr 11 2003 · Eusebio Solórzano Miguel Angel Rodriguez-Perez José Antonio de Saja Thermal Properties of Hollow Spheres Multifunctional Metallic Hollow Sphere Structures 10.1007/_6 (89-107) (2009).

Get Price### Thermal conductivity of metallic hollow sphere structures

The thermal conductivity of metallic hollow sphere structures is analyzed in terms of their main structural parameters (sphere diameter shell thickness and constituent metal) by using analytical

Get Price### Applicability of the transient plane source method to

Thomas Fiedler Eusebio Solórzano and Andreas Öchsner Numerical and experimental analysis of the thermal conductivity of metallic hollow sphere structures Materials Letters 62 8-9 (1204) (2008).

Get Price### Metallic hollow sphere structuresstatus and outlook

Metallic hollow sphere structuresstatus and outlook H. Göhler 1 U. Jehring1 K. Kuemmel 1 J. Meinert So they have a low thermal conductivity high sound absorption coefficient a relatively high strength allowing the construction of self-supporting elements and a good

Get Price### Thermal transport in hollow metallic microlattices APL

Oct 09 2019 · The effective thermal conductivity of hollow nickel microlattices with 99.9 porosity and 1 µ m layer thickness is as low as 0.049 W m −1 K −1 at 320 K and increases to 0.075 W m −1 K −1 at 480 K an increase we attribute to internal thermal radiation.

Get Price### Applicability of the transient plane source method to

Thomas Fiedler Eusebio Solórzano and Andreas Öchsner Numerical and experimental analysis of the thermal conductivity of metallic hollow sphere structures Materials Letters 62 8-9 (1204) (2008).

Get Price### A hollow metallic sphere of radius 20cm surrounds a

May 29 2018 · A hollow metallic sphere of radius 20cm surrounds a concentric metallic sphere of radius 5cm. The space between the two spheres is filled with a nonmetallic material. The inner and outer spheres are maintained at 50°C and 10°C respectively and it is found that 100J of heat passes from the inner sphere to the outer sphere per second.

Get Price### Numerical Simulation of Thermal and Mechanical Properties

Oct 14 2009 · This paper investigates the thermal and mechanical properties of a new type of hollow sphere structures. For this new type the sphere shell is perforated by several holes in order to open the inner sphere volume and surface. The effective thermal conductivity of perforated sphere structures in several kinds of arrangements i.e. primitive cubic (PC) body‐centered cubic (BCC) face

Get Price### Thermal conductivity of metallic hollow sphere structures

A variety of metallic hollow sphere structures were prepared with different metals values for diameter and shell thickness and their densities were predicted using analytical/empirical models. From these densities admitted scaling laws are used to predict thermal conductivity. The predicted values for thermal conductivity are then compared to experimental values for the same structures as

Get Price### Experimental analysis on the thermal anisotropy of

This paper is on the geometrical effective thermal conductivity of hollow metal sphere structures. Two different technologies of joining namely adhesive bonding and sintering are considered.

Get Price### (PDF) Metallic hollow sphere structuresStatus and outlook

Recently new groups of cellular metals such as metallic hollow sphere structures (MHSS) 9 10 11 and Advanced Pore Morphology (APM) foam elements 12 13 14 15 16 have become of

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