The history of ComHighTech


        In the late 70’s at the chair of “Equipment and Technology of Welding and Foundry Production” (Tula State University), W.A. Sudnik founded a new scientific direction dedicated to the development of the scientific basics for numerical modeling and computer simulation of the complex nonlinear thermalphysic and hydromechanical phenomenon assisting welding processes. At the same time, the first international contacts with the chair of welding technologies at the Aachen University (chief prof. F. Eichhorn), the chair of materials science and welding at the Technical University of Braunschweig (chief, prof. J. Ruge), the German Welding Society and other industrial enterprises were made.

        On the basis of the scientific researches of W.A. Sudnik, W.A. Erofeev and A.S. Rybakov in the field of mathematical modeling of welding processes, the software products for modeling the major welding processes in contact, arc, plasma arc, and laser welding and cutting (SPOTSIM, MAGSIM, LASIM, CUTSIM) were developed.

        The MAGSIM software was developed in cooperation with the Aachen Technical University (Germany) for numerical analysis, diagnostic and parametric optimization of the arc welding process (MAG). The program has its versions in the Russian, Bulgarian, German, English, Dutch, Korean, Japanese languages and was bought by many firms and universities all round the world. The SPOTSIM software was created later for numerical analysis and designing of the resistance spot welding technology.

        Success was met by industrial firms from Germany, USA, Japan, South Korea, and other countries. In 1995, with the support of the Daimler-Benz and the Aachen Technical University, the International Scientific and Educational Center Computer High Technologies in Joining of Materials (ComHighTech) at the Tula State University was founded.

        In 1994, the Daimler-Benz (Stuttgart, Germany) contracted with W.A. Sudnik on numerical modeling and computer simulation of the laser welding process for steel and aluminum structures for the firms of the Mercedes-Benz (Stuttgart) and Deutsche Aerospace Airbus (Bremen). At the end of 1995, for the first time, a system thermodynamic model for the process was developed. This model allowed to take into account the major phenomenon in both the laser radiation absorption at the intensity of more than 100 ÌWt/mm2 and the process of the optical discharge plasma development in the metal vapor. The configuration of the melted metal zone plays the role of the heat source for further calculations by means of commercial finite-element programs to compute the deflected mode of welded structures. Developed software DB-LASIM is widely used in the laboratories of the corporation when new products are developed.  In 1999, the corporation (now DaimlerChrysler) stated the task to model electron beam welding and powder surfacing.

        In 1998, the second contract was made with the corporation on modeling of the twin-arc pulsed welding of aluminum alloys.

        The models and relative software MAGSIM, SPOTSIM and DB-LASIM were demonstrated at the biggest international exhibitions and conferences: Schweisstechnische Software, Essen, Germany, 1993 and 1997; Numerical Analysis of Weldability, Graz, Austria, 1995 (Sudnik’s Keynote Lecture), 1997- 1999; Innovation 97, Leipzig, Germany; 1997, Computer Technology in Welding, Paris, France, 1994; Lanacen, Belgium, 1996 and Liverpool, England, 1998.

        Other important presentations of W. Sudnik include:

        2000 - the presentation of the cooperation between the DaimlerChrysler Corp. and the Tula State University on the occasion of the opening of the Moscow House of DaimlerChrysler with the presence of the corporation president Mr. Schremmp, vice-president prof. Voehringer and Moscow’s governor Mr. Luzhkov.

        2000 - participation in the International Conference on Computational Engineering & Sciences, section Computational Weld Mechanics and Welded Structures with the report Computational weld thermodynamics, Los Angeles, USA. It was dedicated to the concept of the computational connection between weld thermodynamics and weld thermomechanics.

        2001- participation in the 7th International Conference High Productivity Joining Processes with the report: Simulation of Pulsed MIG-Welding of Aluminum Alloys. Aachen, Germany.

        Also, the nominal awards of W. Sudnik include:     

        In 2001 - the scientific award by the DaimlerChrysler Corp. for special achievements in mathematical modeling and numerical simulation for industrial goals; this award of the 21 century was presented for the first time.

        In 2003 – W. Sudnik became a laureate of the award of the International Welding Institute on Innovations in software. He was first awarded the Sossenheimer software innovation award for his important contribution to mathematical modeling and numerical simulation of welding processes.

 

        In 2004, he was awarded the gold pin of ISF – Welding Institute, Aachen University.