- 著者
- Johan LARSSON Soshi KAWAI Julien BODART Ivan BERMEJO-MORENO
- 出版者
- 一般社団法人日本機械学会
- 雑誌
- Mechanical Engineering Reviews (ISSN:21879753)
- 巻号頁・発行日
- pp.15-00418, (Released:2015-11-17)
- 参考文献数
- 85
- 被引用文献数
- 2 282
The paper provides a brief introduction to the near-wall problem of LES and how it can be solved through modeling of the near-wall turbulence. The distinctions and key differences between different approaches are emphasized, both in terms of fidelity (LES, wall-modeled LES, and DES) and in terms of different wall-modeled LES approaches (hybrid LES/RANS and wall-stress-models). The focus is on approaches that model the wall-stress directly, i.e., methods for which the LES equations are formally solved all the way down to the wall. Progress over the last decade is reviewed, and the most important and promising directions for future research are discussed.
- 著者
- M. C. NATORI Hiraku SAKAMOTO Nobuhisa KATSUMATA Hiroshi YAMAKAWA Naoko KISHIMOTO
- 出版者
- 一般社団法人日本機械学会
- 雑誌
- Mechanical Engineering Reviews (ISSN:21879753)
- 巻号頁・発行日
- vol.2, no.1, pp.14-00368-14-00368, 2015 (Released:2015-01-01)
- 参考文献数
- 25
- 被引用文献数
- 15
This paper discusses what has been found and what will be found using conceptual “origami” models to develop deployable space structures. The study covers the following: (i) one-dimensional structural elements, which are axially buckled inflatable tubes; (ii) two-dimensional elements, which are deployable membranes, such as solar arrays and solar sails; and (iii) deployable elements in nature. The study clarifies what design considerations are necessary to adapt the basic concepts to actual space structural hardware, and several limitations of origami models are discussed. Regarding the last subject, this study envisions future space structures using conceptual origami models that imitate three-dimensional deployable structures in nature, such as flowers and insect wings.
- 著者
- Yoshihiro TOMITA
- 出版者
- 一般社団法人日本機械学会
- 雑誌
- Mechanical Engineering Reviews (ISSN:21879753)
- 巻号頁・発行日
- pp.15-00170, (Released:2015-06-01)
- 参考文献数
- 80
The constitutive equations for rubbers that are derived based on the molecular chain network model and their generalization to account for the non-affine deformation and viscoelastic deformation of rubbers are presented for the evaluation of the complex deformation behaviors under monotonic and cyclic deformation at different strain rates. Several applications of the constitutive equations using the finite element homogenization method for the evaluation of microscopic to macroscopic deformation behaviors of particles such as carbon black and silica-filled rubbers are addressed. The typical deformation behavior of rubbers and the essential mechanism of enhancement in the mechanical characteristics of particle-filled rubbers under monotonic and cyclic straining are clarified focusing on findings from our recent works.