Region of Research

Joining and Welding Research Institute has proposed the concept of computational welding science as early as 1970's. It is one of the world pioneers in this field and has organized an international symposium on "Theoretical Prediction in Joining and Welding" in 1996. In further development of computational welding science, JWRI conducted a project on "Development of Highly Efficient and Reliable Welding Technology" which has been supported by the New Energy and Industrial Technology Development Organization (NEDO). One of the main objectives of this project is to establish a framework of the computational welding science which covers the entire aspects of welding, i.e. Welding Process, Welding Metallurgy and Welding Mechanics. This framework has been further developed with the rapid progress in the computer technology to meat various demands from the industry.
Japanese industry is experiencing a drastic change since the last decade or so. Japanese manufacturing system, traditionally heavily dependent on skilled workers, is changing toward science and technology based production. This is due to the shortage of highly skilled workers. To realize this goal in the area of welding, the CCWS was established in 2007. Its mission is to conduct fundamental researches on computational welding science and to provide education to researches and engineers. In addition, as a leader of the computational welding science, the CCWS will develop and promote our welding simulation software JWRIAN.

Current Research Subjects

  1. Development of computational method for large scale fast welding simulation
  2. Numerical study of welding distortion, residual stress and cracking
  3. Prediction of long term behavior of welded joints under various thermal and mechanical loads
  4. Development of welding simulation software JWRIAN
  5. Development of welding distortion & residual stress database

Prof.
N. MA
Assoc. Prof.
H. Serizawa
G. Prof.
H.Murakawa
G. Prof.
S. Rashed
G. Prof.
K. Hiraoka
G. Prof.
Y. Okumoto
G. Assoc. Prof.
M. Shibahara
   

Welding distortion in
assembling superstructure of ship.

Residual stress distribution of butt weld joint of thick plate and its redistribution after cutting.


Improvement of residual stress using low transformation temperature weld metal
 
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