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COMBINED SHALLOW SPHERICAL SHELL AND FINITE ELEMENT METHOD OF PANEL STIFFNESS
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English
Abstract
The study is a combination of finite element method and the basic equations of shallow spherical shell to determine the required stiffness of outer surface panel. One finite element model is run and the required stiffness for different thickness or sweep is achieved from the shell equations by numerical iteration. Thus, the many finite element trials required to evaluate the clay surface can be avoided. Iso-stiffness curves are also presented with a direct conversion of panel thickness from steel to aluminum. A computer program for this method has been developed and applied for hoods, deck lids and roofs of various models. It is found that the stiffness results, in general, are satisfactory. In the case of a panel with outboard character lines the center unsupported area shows more accurate results than the outboard area.
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Citation
Mahmood, H., "COMBINED SHALLOW SPHERICAL SHELL AND FINITE ELEMENT METHOD OF PANEL STIFFNESS," SAE Technical Paper 790979, 1979, https://doi.org/10.4271/790979.Also In
References
- Reissner E. “Stress and Small Displacement of Shallow Spherical Shells” J. Math. phys. 24 1947
- Archer A. Hesneh P. “Large Deflection of Shallow Rectangular Shell Panels” AIAA 8 2 1970
- Mescall M. “Large Deflection of Spherical Shells Under Concentrated Load” J. Appl. Mach. 32 1965
- Timoshenko S. Woinowsky-Krieger “Theory of Plates and Shells” 2nd McGraw-Hill Book Company New York 1959
- Adams D. G. “Automotive Panel Sweep/Stiffness Analysis” Paper 740080 SAE Automotive Engineering Congress Detroit February 1974
- George R. Swenson W. Adams D. “Aluminum in Automobiles - Why and How It's used” Paper 760164 SAE Automotive Engineering Congress Detroit February 1976
- Mahmood H. “Outer Inner Surface Analysis-Test Program-” Technical Memorandum No. 8001, Vehicle structure analysis Chrysler Coorporation January 1978