Algorithms of the method of statically admissible discontinuous stress fields (SADSF) . P. 4 Inegration of fields around nodes into planar complex fields

• Autorzy: Bodaszewski W.
• Języki publikacji: EN

Abstrakty

EN

In this part of the paper, the author presents a general concepts of algorithms of two program modules that integrate component fields around nodes into planar complex fields. The first module, the auxiliary one called module C, is used to construct the objects of incidence of the regions and the lines that are generated automatically, based on a freehand sketch of the field structure - which can be drawn, for example, on the monitor screen by means of a mouse. The proper integration, however, is performed by the second module, called module B, which utilises both the incidences brought in by module C, and the solutions of component systems of stress discontinuity lines around nodes - the latter obtained using the module called A. The individual partial problems are still demonstrated here, and the example of the already known solution of the field type f90 is used for this purpose. Attention is also focussed on the effects of partial autonomy that are revealed in the integration problems. These effects consist in decoupling of two systems of conditions: the one defined on geometrical parameters, and that based on stress parameters. The conditions are utilised, for example, in the algorithms of the application version software for finding particularly complicated fields that could contain as much as several dozens of homogeneous regions. An example of such a solution is shown along with its application to forming complex elements of a structure. The example confirms once again great potential of the SADSF method.

Słowa kluczowe

EN

SADSF method; numerical methods; shape design; limit analysis

PL

metoda SADSF; metody numeryczne

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Engineering Transactions
• Rocznik: 2005
• Tom: Vol. 53, iss. 2
• Strony: 119--131
• Opis fizyczny: Bibliogr. 5 poz., rys., wykr.

Twórcy

autor

Bodaszewski W.

• Kielce University of Technology, Tysiąclecia P. P. 7, 24-314 Kielce,

Bibliografia

• 1. W. SZCZEPIŃSKI Plastic design of machine parts [in Polish], PWN, Warszawa 1968.
• 2. W. BODASZEWSKI Stress discontinuity line structures in yield zones satisfying the Huber­Mises condition [in Polish], Engineering Transactions, part 1 36, 1, 29-54, 1988, part 2 and 3 37, 3, 415-442, 1989.
• 3. W. BODASZEWSKI The software package KNPN for approximated shaping of complex plastic structures, VIII-th Symposium on Stability of Structures, Łódź University of Technology, Poland, 25-30, 1997.
• 4. I. MARKIEWICZ Numerical determination of statically admissible link systems of stress discontinuity lines in limit Huber-Mises's fields [in Polish], doctoral thesis, Warsaw University of Technology, 1996.
• 5. Internet website: www.sadsf.net.