In this paper, four possible CAE analysis methods for calculating critical buckling load and post-buckling permanent deformation after unloading for geometry imperfection sensitive thin shell structures under uniformly distributed loads have been investigated. The typical application is a vehicle roof panel under snow load. The methods include 1) nonlinear static stress analysis, 2) linear Eigen value buckling analysis 3) nonlinear static stress analysis using Riks method with consideration of imperfections, and 4) implicit quasi-static nonlinear stress analysis with consideration of imperfections. Advantage and disadvantage of each method have been discussed. Correlations between each of the method to a physical test are also conducted. Finally, the implicit quasi-static nonlinear stress analysis with consideration of geometry imperfections that are scaled mode shapes from linear Eigen value buckling analysis is preferred.
A Study on Body Panel Stress Analysis under Distributed Loads
Sae Technical Papers
SAE 2014 World Congress & Exhibition ; 2014
2014-04-01
Aufsatz (Konferenz)
Englisch
Tapered Beams under Distributed Flank Loads
Emerald Group Publishing | 1954
|Spectral Element Analysis of the Structures Under Dynamic Distributed Loads
British Library Conference Proceedings | 1996
|Stress-density relationships under various compactive loads
Kraftfahrwesen | 1987
|AIAA | 1996
|