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Global and Local Design Method for Fatigue Resistant Structures
Technical Paper
2003-01-0915
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Results concerning Finite Element stress analysis and fatigue life predictions of various thin-walled structures designed according to the Statically Admissible Discontinuous Stress Fields (SADSF) method are presented and discussed in the paper. The SADSF method is one of a very few approaches enabling effective, from the load limit analysis viewpoint, design of geometrical shapes and spatial distribution of the material for prescribed geometrical and load boundary conditions. The resultant geometry of the structure is obtained by satisfying equilibrium conditions and maintaining the same equivalent stress in each of the discrete regions of the object. Such requirements can be satisfied if a relatively simple material model is used and as a consequence the ideal rigid-plastic material model is used when the system of discrete statically admissible stress field is looked for. Although the method does not rely on the actual stress fields in the case of linear elastic material the results obtained up to date indicated that all structures designed with the help of the SADSF method had optimum static load capacity. Basic principles of the method are briefly described illustrating also the use of the method in designing global geometry of a thin-walled structure. The same method is used in the subsequent application for designing the optimum geometry of a local welded connection. The Finite Element stress analysis of thin-walled structures designed according to the SADSF method revealed very uniform membrane-type distribution of stresses over the entire structure with negligible local bending moments. All weldments designed according to the SADSF method showed significant extension of fatigue durability in comparison with the standard geometry.
Authors
Citation
Markiewicz, I., Bodaszewski, W., and Glinka, G., "Global and Local Design Method for Fatigue Resistant Structures," SAE Technical Paper 2003-01-0915, 2003, https://doi.org/10.4271/2003-01-0915.Also In
References
- Szczepiński W. ‘Plastic design of machine parts’, PWN Warsaw 1968
- Bodaszewski W. ‘Problems of optimization defined on parameter sets of statically admissible discontinuous stress fields’, The Archive of Mechanical Engineering XLIV 4 1997 311 342
- Bodaszewski W. ‘Algorithms of SADSF method’, The Archive of Mechanical Engineering 2002
- Bodaszewski W. ‘The software package KNPN for approximated shaping of complex plastic structures’, VIIIth Symposium on “Stability of Structures” Technical University of Łódż & Committee of Machine Design Polish Academy of Sciences Poland 1997 25 30
- Bodaszewski W. ‘News in SADSFaM’ www.tzc.net
- Bodaszewski W. ‘Application approach to the SADSF method’, XV Conference on “Problems of mechanical engineering and robotics” Committee of Machine Design Polish Academy of Sciences 2002 51 58
- Bodaszewski W. ‘Stress discontinuity line structures in yield zones satisfying the Huber-Misses condition; structural conditions of the existence of elementary fields ’, Engineering Transactions 36 1 1988 29 54 37 3 1989 415 442
- Bodaszewski W. ‘Statically admissible nets of stress discontinuity lines’, Institute of Fundamental Technological Research - Polish Academy of Sciences, 43/1983
- Bodaszewski W. ‘Multilevel shape design of structures by the SADSF method’, XII Conference on “Problems of mechanical engineering” Committee of Machine Design Polish Academy of Sciences 1999 2 11 17
- Bodaszewski W. Markiewicz I. ‘Analysis of elastic effort in thin-walled open structures shaped by the method of statically admissible discontinuous stress fields’, Conference Thin-Walled Vessels Committee of Machine Design Polish Academy of Sciences, Kartłów 1998 7 10
- Bodaszewski W. Markiewicz I. ‘ Numerical analysis of behavior of open shell shaped by the method of statically admissible discontinuous stress fields’, XII Conference on “Computer Aided Engineering” Warsaw University of Technology Warsaw 1999 47 50
- Bodaszewski W. Markiewicz I. ‘The investigation of shells shaped by the SADSF method in the full range of equilibrium paths’, 19th Symposium on Experimental Mechanics of Solids Warsaw University of Technology & Committee for Mechanics of the Polish Academy of Science 2000 145 150
- Winzer Carrier G.F. ‘ The interaction of discontinuity surfaces in plastic fields of stress’, J. Appl. Mech. 15 261 264 1948
- Markiewicz I. Bodaszewski W. ‘An iterative method of solving statically admissible link systems of stress discontinuities in planet limit Huber-Mises's fields’, XXI Polish Solid Mechanics Conference Institute of Fundamental Technological Research–Polish Academy of Science Poland 1996 170
- Szczepiński W. Szlagowski J. ‘Plastic design of complex shape structures’, Ellis Horwood & PWN Warszawa - Chichester 1990
- Wetzel R. M. ‘Fatigue under Complex Loading: Analysis and Experiments’ 6 Society of Automotive Engineers Warrendale, Pa. 1977
- Glinka G. ‘Fatigue Software Package FALIN’, Stress and Fatigue-Fracture Design Inc. (SaFFD, Inc.) RR#2 Petersburg, Ontario N0B 2H0, Canada 2002
- Chan S.W.K. ‘The Strength of Fillet Welded Joints in Steels Subjected to Static Loading – a Review’, The Welding Institute Cambridge, UK Paper No. 379 1988