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Introduction of Laboratory ( Digital Manufacturing )



Research Field: Control Systems

 Materials Strength and Deformation
at Elevated Temperatures
 Shape Memory

(Left)Analysis by means of XMA micro-analyzer (Middle)X-ray diffraction pattern observed in a titanium-aluminum alloy constituted with gamma-phase intermetallic compound and alpha2-phase ordered alloy (Right)Arc melting of the test samples

Researches on Materials Strength and Deformation Mechanisms

Various types of structural and/or functional materials (metals and alloys, ceramics, polymers and composites) are used in modern mechanical systems like airplanes. In this laboratory, mostly metallic materials are focused in its strength and deformation, especially at elevated temperatures. The main subject is concerning the structure-property relationships and their microscopic and/or atomistic mechanisms.
Studies are under way in this laboratory to characterize the strength of titanium aluminide intermetallics that is prospective for lightweight and high-temperature structural applications in future airplanes. Thermal and mechanical properties of NiTi shape memory alloys and their alloying effects are also investigated.
In addition, a very basic study about grain boundary sliding behavior in bi-crystal specimens is being carried out to clarify the grain boundary dislocation model that can describe the special behavior of coincidence grain boundaries.



MIYASHITA Ryusuke Technological profession staff



Research Field: Elastic-Plastic Analysis of Solids

Metal Forming Earth's environment Computer Simulation

Kuwabara Lab Images
(Left) A servo-controlled biaxial tensile testing machine for measuring the elastic-plastic behavior of sheet metals by applying orthogonal biaxial tensile forces to a cruciform specimen (Right) Investigation on the fracture mechanism of metals by applying internal pressure and axial force to a tubular specimen using a servo-controlled tube-bulging testing machine

Plasticity saves the earth's environment

Metals have the property of permanent deformation. It is referred to as plasticity. Scientific knowledge on the metal plasticity is a must for developing and establishing the manufacturing technology that is friendly to the earth's environment. The mission of Kuwabara lab is to perform ultimate studies on metal plasticity and to contribute to the earth's environment and the welfare of humanity.

  • To develop novel material testing apparatus, as shown in the pictures above, for precisely measuring the anisotropic plastic behavior of metal sheets and tubes under a variety of loading paths.
  • To develop and validate phenomenological constitutive models (anisotropic yield criteria and its associated/non-associated flow law) through the comparison of observed material responses with those predicted using phenomenological plasticity models
  • To establish the methodologies for accurate FEM simulations based on refined material models for steels, aluminum, copper, titanium and magnesium alloys. These metals are very important for establishing the manufacturing technology that is friendly for the earth's environment.
  • To develop intelligent metal forming machines

Toshihiko Kuwabara Professor
Toshihiko KUWABARA

SYUNO Masayuki Technological profession staff
Masayuki SYUNO



Research Field: Material Engineering for Machinery

Advanced Composite Materials  Aircraft  Space Transportation System
Ogasawara Lab. Image1
High-temperature mechanical testing of ceramic matrix composites for future turbo-fan engines (@JAXA)
Ogasawara Lab. Image2
Durability test of ablator in simulated atmospheric re-entry condition using a plasma wind tunnel. (@JAXA)

Advanced composite materials for aerospace, automobile, robot, and energy system

Advanced composite materials are one of the key technologies in the innovation of aerospace, automobile, robot, and energy system in future. We are attempting to develop original composite materials such as carbon fiber reinforced plastics (CFRP), ceramic matrix composites (CMC), carbon nanotube composites, and ablators to impress other researchers in all over the world. We are continuously conducting joint research with Japan Aerospace Exploration Agency (JAXA). Under the collaboration, we are using equipment in JAXA Chofu Space Center, and making some special experiments such as mechanical testing at high temperatures ( > 1700 K), micro-nano mechanical testing using electron microscope, material durability test in plasma wind tunnel and others.

Toshio Ogasawara Professor

Shota Kawasaki Assistant Professor