Vol. 2, No. 3, 2007

Download this article
Download this article For screen
For printing
Recent Issues

Volume 12, 1 issue

Volume 11, 5 issues

Volume 10, 5 issues

Volume 9, 5 issues

Volume 8, 8 issues

Volume 7, 10 issues

Volume 6, 9 issues

Volume 5, 6 issues

Volume 4, 10 issues

Volume 3, 10 issues

Volume 2, 10 issues

Volume 1, 8 issues

The Journal
Editorial Board
Editors’ Addresses
Research Statement
Scientific Advantage
Submission Guidelines
Submission Form
Author Index
To Appear
ISSN: 1559-3959
Macroscopic elastic properties of randomly packed balloons

Isao Taguchi and Michio Kurashige

Vol. 2 (2007), No. 3, 529–555

Macroscopic elastic properties of sintered, randomly packed balloons are estimated for various degrees of sintering and for a wide range of balloon wall thickness. Macroscopic elastic moduli are little affected by a balloon’s inner/outer diameter ratio for thicker balloons, while those of thinner balloons are very sensitive to the ratio. The elastic moduli rapidly decline with decreasing wall thickness. They are larger in the direction of gravity than in the horizontal one, corresponding to gravity-affected packing structures. Specific elastic moduli have a peak against porosity. Poisson’s ratios are negative in some cases of very thin balloon walls and very low sintering degree. Comparison of the present random packing with the regular simple cubic packing reveals that there is a significant difference between them in their elastic properties and their structures of anisotropy, although both have almost the same coordination number.

balloon, elastic modulus, random packing, transverse isotropy, negative Poisson's ratio, optimum design
Received: 23 April 2006
Accepted: 31 August 2006
Published: 1 May 2007
Isao Taguchi
Graduate School of Engineering
Iwate University
Ueda 4-3-5, Morioka
Iwate 020-8551
Michio Kurashige
Department of Mechanical Engineering
Iwate University
Ueda 4-3-5, Morioka
Iwate 020-8551