Study on vehicle body structure in frontal collision part IV: Effective structural design of thin-walled curved beams Hiroshi Suganuma (Subaru Research Center), Akira Oda (Isuzu), Hironori Tomizawa (Kanio Auto Works), Hsiao Mikami (Daihatsu), Akihito Norioka (Nissan Diesel), Kentaro Sato (NKK), Masaaki Watanabe (Tokyo Univ. of Agric. and Tech.)

JSAE Review ◽  
1997 ◽  
Vol 18 (2) ◽  
pp. 196-197
Keyword(s):  
Structural Design ◽  
Research Center ◽  
Vehicle Body ◽  
Body Structure ◽  
Curved Beams ◽  
Frontal Collision ◽  
Thin Walled

Pretwisted Curved Beams of Thin-Walled Open Section

1972 ◽  
Vol 39 (3) ◽  
pp. 779-785 ◽  
Author(s):  
A. I. Soler
Keyword(s):  
Numerical Technique ◽  
Equations Of Motion ◽  
Highway Bridges ◽  
Major Effect ◽  
Curved Beams ◽  
Open Section ◽  
Straight Beam ◽  
Thin Walled ◽  
Bending Modes ◽  
Axes Of Symmetry

Equations of motion are derived for coupled extension, flexure, and torsion of pretwisted curved bars of thin-walled, open section. The derivation is based on energy principles and includes inertia terms. The major effect of initial pretwist is to allow coupling of all possible beam deformation modes; however, if the bar is straight and has two axes of symmetry, pretwist causes coupling only between the two bending modes, and between extension and torsion. The governing equations are presented in first-order form, and a numerical technique is suggested for the case of space varying pretwist. It is suggested that these equations may form the basis for a simplified study of the effect of superelevation on the static and dynamic response of curved highway bridges. Finally, a simple straight beam with uniform pretwist is studied to compare effects of pretwist and restrained torsion in a thin-walled beam of open section.

Minimum Weight Design of Thin–walled Cells in Torsion

1955 ◽  
Vol 59 (530) ◽  
pp. 120-126 ◽  
Author(s):  
V. Cadambe ◽  
S. Krishnan
Keyword(s):  
Structural Design ◽  
Necessary Conditions ◽  
Minimum Weight ◽  
Local Buckling ◽  
Design Criteria ◽  
Minimum Weight Design ◽  
Weight Design ◽  
Uniform Wall ◽  
Thin Walled ◽  
Twisting Deformation

The minimum weight approach to structural design was introduced by F. R. Shanley with reference to narrow and wide columns and shells subjected to bending, and was later dealt with more comprehensively in a book by the same author. This was further extended to structures like tapered round thin-walled columns and frames. In this paper expressions giving optimum sectional dimensions for long thin walled cells of circular, semi–circular, rectangular and triangular shapes and uniform wall thickness have been derived. The design criteria used to obtain the minimum necessary conditions are (1) failure by local buckling and (2) a limit on the twisting deformation of the cells. Working curves from which the optimum sectional dimensions can be read for given torque and limiting twist have been plotted. And finally, a method of approach to the problem of combined bending and torsion has also been indicated.

Paper 8: Small Computer Procedures as Tools for Structural Designers

1969 ◽  
Vol 184 (13) ◽  
pp. 62-70
Author(s):  
G. A. Wardill
Keyword(s):  
Structural Design ◽  
Design Tool ◽  
Vehicle Body ◽  
Small Computer ◽  
Test Results ◽  
Data Preparation ◽  
Processing Times ◽  
Beam Mode

The system of simplified computer procedures described is intended as a basic structural design tool for designers and draughtsmen. An example is given of how to estimate the beam-mode deflection of a production vehicle body. The degree of accuracy obtained is shown by comparison with rig test results. Data preparation and processing times are also discussed.

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