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T E S T I M O N I A L Johan Tryding, social security number 610926-XXXX, have been employed at Tetra Pak during the period 1 May 1990 to 31 May 1997. Johan was employed as a structural engineer in the technical computer simulations group. This group had as its main task to give computer simulation services to the Tetra Pak group research and development companies world-wide, in the area of solid mechanics, heat transfer and kinematics. Johan has on his own conducted advanced simulation on machine parts as well as packages and packaging material. The technical computer simulations were mainly made with help of the finite element method and were concentrated on non-linear problems like e.g. material plasticity, instability and contact problems. The most frequently used commercial program code was I-DEAS and ABAQUS. The work has also included programming of own subroutines to FE-codes with FORTRAN. Johan has been the driving force behind the development of a mathematical model for paper and paperboard material for structural mechanical simulations. Johan worked for a short time within the department for new products at Tetra Brik were he conducted computer simulation to study the behavior of the packaging material when liquid food products is packed in the filling machines. During 1994 and in the beginning of 1995 Johan had the responsibility for mechanical testing of polymer materials within Tetra Pak R&D AB. This included responsibility for development of new testing methods and in that position he also acted as the laboratory specialist against our ongoing pre-studies and concepts. Johan had also contact with external laboratories, instrument suppliers, institutes and universities. He also conducted computer simulation (FE-analysis) on packages concerning the structural mechanics for our concepts. Johan has also worked 50% with research in paper physics and simulations (from 1994 to the beginning of 1997). This work resulted in a Doctor of Philosophy in Engineering degree with the title 'In plane fracture of paper'. During the later part of his employment Johan worked with forming of package material in one of our development projects. Johan has a scientifically work approach. In our team he has worked with both theoretical and experimental orientated colleges, in a very fruitful way for Tetra Pak. He is not afraid for unconventional solutions which has created several new possibilities both within problem solving and at development new work methods. Johan is also a good pedagogue which leads to that his scientifically results reach a big audience, even to more practical directed colleges. Johan have an extensive commitment for this work and is easy to cooperate with. When Johan today, on his on request, leave his employment with us we would like to give him our best recommendations. Lund, 31 May 1997. Tetra Pak Research & Development AB. Åsa Brännborn |
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