US and Japanese scientists conduct joint composites study

Dr. Keisuke Umezawa of the Air Systems Research Center in the Japanese Ministry of Defense joined the Air Force Research Laboratory on an engineers and scientists exchange program.

US and Japanese scientists conduct joint composites study
The JMoD chose Umezawa for the ESEP based on his experience as a stress analysist of polymer matrix composite materials. Also, Umezawa has been heavily involved in the development of the next generation Japanese fighter aircraft, including the development of the test program for prototype composites structures.

The Air Force uses composites on many parts of the aircraft. They are much lighter and cheaper than other materials.

Umezawa’s primary work focuses on the modeling of damage evolution in composites materials using an AFRL-developed research software package. This tool, known as BSAM, is a result of many years of research and development led by Dr. David Mollenhauer of AFRL’s Composite Performance Research Team.

The stress analysis software simulates damage processes in composite materials. Specifically, damage in compositess is characterized by complex networks of cracking in the polymer matrix, delamination between layers and fiber fractures.

Umezawa is training on the software and then developing a variety of composites damage simulations. His primary simulation campaign will focus on simulations of laminated compositess that have a long, thin saw-cut, mimicking a crack, and observe how damage grows from these “cracks” within the BSAM simulation environment.

As with AFRL, the JMoD has come to the realization that commercial composites damage codes are lacking in capability. BSAM has limited, but growing exposure in the research and design community. Training Dr. Umezawa in the use of this advanced code is a continuing step in spreading the word about this new useful tool.

Umezawa said:

“I’m happy to work as an ESEP engineer in AFRL and very excited to join the project on BSAM”

His efforts aid an ongoing experimental effort that examines damage in compositess. Additionally, Umezawa brings insight to the U.S. Air Force on composite research and development at the JMOD, especially in relation to the new Japanese fighter program.

Mollenhauer said:

“I’m elated to work with Dr. Umezawa to further enhance the strong relationship between the U.S. Air Force and the JMoD’s Air Systems Research Center.”

Hands-on use of AFRL products by colleagues benefits the U.S. Air Force by providing feedback on usability, capability and needs. Umezawa will aid in the evaluation of the simulations against experimental results gathered at AFRL, resulting in a better understanding of the BSAM code’s effectiveness.

Companies: Wright-Patterson AFB

Industries: Defence & Military

Terms: News Worldwide

This article has been edited by Basalt.Today
This article has been written on JEC Composites Magazine
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