Profiles and Activities | Graduate School of Symbiotic Systems Science and Technology

Yoshihito OZAWA(Professor)
Affiliated Specialty Division	Division of Human Support System
Specialized Field of Study	Computational Mechanics for Solid, Materials System Design, Materilas Science and Engineering
Final Academic Background	Graduate School of Engineering, Tohoku University, Japan
Academic Degree	Ph. D(Tohoku University)

Courses In Charge

Mechanics of Materials
In materials science, the strength of a material refers to the material's ability to resist an applied force. In order to have strong and good structure of machinery, the relationship between applied forces and shape of elements, materials properties and effects of environments in use is treated in this lecture.
Computer Aided Design and Machining
CAD is extensively used in the design of tools and machinery used in the manufacture of components, and in the drafting and design of all types of machines and structures and buildings. Method of mechanical design for components and structures of machinaries and JIS/ISO industrial standards should be learned by doing excises of CAD/CAM.
Universal Design in Human Life
The design of products and environments to be usable by all people, to the greatest extent possible, without the need for adaptation or specialized design. In this lecture, the Principles of Universal Design are treated here, in the following: the principles, definition of the principle, statement of the key concept, and guidelines for application. Practical excises will be performd for better understanding of UD.

Main Research

Research Works
In developing the high speed robotics hand system, a newly designed structure component must be needed with excellent features: It is ultra lightweight (its density less than 0.5g/cm3), high stiffness and high strength. Learning the smart bone system of human being, we should design the material system with lightweight and determine an optimum structure of robotics hand system. In order to satisfy both of lightweight and high stiffness/ strength, a lightweight composite material system, which will consist of core material with lightweight and outer fibrous material of woven type or knitted type, is one of the candidates for application. In this study, mechanical behavior of composite material system with lightweight is investigated in the temperature condition. From the experimental results, the effects of material properties and configurations on the mechanical properties of the composite will be discussed from the viewpoint of micro-mechanical study. By using an analytical model of micro porous materials, a homogenization theory with multi-scale analytical method will be described in order to evaluate the mechanical behavior of the composite material system.

Research Works

In developing the high speed robotics hand system, a newly designed structure component must be needed with excellent features: It is ultra lightweight (its density less than 0.5g/cm3), high stiffness and high strength. Learning the smart bone system of human being, we should design the material system with lightweight and determine an optimum structure of robotics hand system. In order to satisfy both of lightweight and high stiffness/ strength, a lightweight composite material system, which will consist of core material with lightweight and outer fibrous material of woven type or knitted type, is one of the candidates for application.
In this study, mechanical behavior of composite material system with lightweight is investigated in the temperature condition. From the experimental results, the effects of material properties and configurations on the mechanical properties of the composite will be discussed from the viewpoint of micro-mechanical study. By using an analytical model of micro porous materials, a homogenization theory with multi-scale analytical method will be described in order to evaluate the mechanical behavior of the composite material system.

Introduction of Laboratory

My research work is focus on strength of advanced composite materials in severe environment and their micromechanics, mechanical properties of organic composites.

1. Evaluation of Properties of Advanced Composites and in Thermal and Moisture Environment
　Keywords: Advanced Composites, Properties, Environmental Conditions
　Research Field： Machine material/Material mechanics

2. Development of Eco-Composites and Evaluation of Their Properties in Various Usages
　Keywords: Eco-Composites, Properties, Environmental Conditions
　Research Field： Machine material/Material mechanics

3. Strength of Thermal Fatigue of Polymer Composites in Space Environment
　Keywords: Thermal stress, Composed Materials and Properties, Experimental analysis
　Research Field： Machine material/Material mechanics

4. Effect of Moisture and Temperature Conditions on Fatigue Life of a Cracked Aluminum Panel with Bonded Composite Repair for Aged Aircrafts
　Keywords: Moisture and Thermal stress, Composed Materials and Properties, Experimental analysis
　Research Field： Machine material/Material mechanics

5. Effects of Ply Anisotropy on Behavior of Transverse Ply Cracking in Cross-Ply Laminates.
　Keywords: Composite Materials, Transverse Ply Cracking, Thermal Stress
　Research Field： Machine material/material mechanics

Recent Writings, etc.

1.	Ozawa, Y. and Kikuchi, T., "Mechanical Characteristic of Bacterial Cellulose Composite Materials, " Proceedings of The 16th International Congress on Composite Materials, (2007-7), pp.416-417 (Book of Abstract), File No.TuGA1-03 (CD-ROM, Full Paper of 6 pages).
2.	Ozawa, Y., Kikuchi, T., Watanabe, M. and Yabuki, K., "Mechanical Behavior of Composite Material System with Lightweight in Temperature Condition, " Proceedings of The Seventh International Congress on Thermal Stresses, (2007-6), pp.733-736.
3.	Sato, M., Yokobori, A. T. Jr., Ozawa, Y., Kamiyama, T. , Miyanaga, T., Beaumont, P. W. R., and Sekine, H., "Experimental Study of Repair Efficiency for Single-Side Composite Patches Bonded to Aircraft Structural Panel, " Advanced Composite Materials, Vol. 11, No. 1, (2002), pp.51-59.
4.	"The Wonders of Strength" -to learn the strength of materials by enjoying Had-makings-, The Japan Society of Mechanical Engineers ed., Gihodo Press, Tokyo, 2005.
5.	Kikuchi, T., Ozawa, Y. and Takahashi T., Apply for a Japanese Patent:2007－231769,"Porus body materials and their fabrication method".