Semi-analytical study of buckling response for grid-stiffened panels during creep age forming
File(s)
OA Location
Author(s)
Zhou, Wenbin
Shi, Zhusheng
Lin, Jianguo
Type
Journal Article
Abstract
The elastic–plastic buckling response of panels with grid stiffeners during creep age forming (CAF) has been studied using a semi-analytical method in this research. A simplified model for panels with multiple grid stiffeners under bending has been established and the effective width has been applied to consider the flexible skin effect and multiple stiffener effect. In the semi-analytical method, the equilibrium equation for the simplified model has been solved via differential quadrature method to acquire the buckling stress of grid-stiffened panels, using deformation theory (DT) and incremental theory (IT) of plasticity. The results with IT show good agreements with both the published experimental and non-linear FE results, demonstrating its effectiveness. Based on the method, the effects of geometric dimensions of grid-stiffened panels, multiple stiffeners and temperature on buckling response in the elastic and plastic regions have been studied. It is found that the transverse stiffener provides a 13.9% higher buckling stress of grid-stiffened panels than blade-stiffened panels, and buckling may occur in the heating stage during CAF. The proposed semi-analytical method based on IT provides accurate predictions of buckling stress during either CAF or cold forming, which can guide the parameter optimisation of grid-stiffened panels in design.
Date Issued
2023-01-01
Date Acceptance
2022-10-06
Citation
Thin-Walled Structures, 2023, 182 (Part A)
ISSN
0263-8231
Publisher
Elsevier BV
Journal / Book Title
Thin-Walled Structures
Volume
182
Issue
Part A
Copyright Statement
© 2022 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license
(http://creativecommons.org/licenses/by/4.0/).
(http://creativecommons.org/licenses/by/4.0/).
License URL
Sponsor
AVIC Manufacturing Technology Institute
Grant Number
N/A
Subjects
Civil Engineering
0901 Aerospace Engineering
0905 Civil Engineering
0913 Mechanical Engineering
Publication Status
Published
Article Number
ARTN 110231
Date Publish Online
2022-11-01