TY - JOUR
T1 - Non-linear finite element investigation of formability limit by buckling in creep age forming of stiffened panels
AU - Zhou, Wenbin
AU - Rong, Qi
AU - Shi, Zhusheng
AU - Zeng, Yuansong
N1 - Funding Information:
The strong support from the Aviation Industry Corporation of China (AVIC) Manufacturing Technology Institute (MTI) for this funded research is much appreciated. The research was performed at the AVIC Centre for Structural Design and Manufacture at Imperial College London.
Publisher Copyright:
© 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the 18th International Conference Metal Forming 2020
PY - 2020/9/4
Y1 - 2020/9/4
N2 - This paper focuses on the prediction of the formability limit of the stiffened panels during the loading stage and heating stage of the creep age forming (CAF) process. A set of non-linear finite element (FE) simulations has been carried out to investigate the elastic-plastic buckling behaviour of stiffened panels subjected to pure bending at the room temperature and the ageing temperature (155°C) for AA2050. From the nonlinear FE simulations, the effects of main geometric parameters (stiffener thickness and stiffener height) on the critical buckling stress and the critical radius of the stiffened panel have been investigated at both temperatures. Increasing the stiffener thickness or decreasing the stiffener height leads to an increase of the critical buckling stress and an increase of formability limit. The critical buckling stress at the ageing temperature is smaller than that at the room temperature when the stiffened panel enters the plastic region, however, the formability increases slightly at the ageing temperature.
AB - This paper focuses on the prediction of the formability limit of the stiffened panels during the loading stage and heating stage of the creep age forming (CAF) process. A set of non-linear finite element (FE) simulations has been carried out to investigate the elastic-plastic buckling behaviour of stiffened panels subjected to pure bending at the room temperature and the ageing temperature (155°C) for AA2050. From the nonlinear FE simulations, the effects of main geometric parameters (stiffener thickness and stiffener height) on the critical buckling stress and the critical radius of the stiffened panel have been investigated at both temperatures. Increasing the stiffener thickness or decreasing the stiffener height leads to an increase of the critical buckling stress and an increase of formability limit. The critical buckling stress at the ageing temperature is smaller than that at the room temperature when the stiffened panel enters the plastic region, however, the formability increases slightly at the ageing temperature.
KW - Buckling
KW - Creep age forming
KW - Formability
KW - Non-linear finite element method
KW - Stiffened panel
UR - http://www.scopus.com/inward/record.url?scp=85099807215&partnerID=8YFLogxK
U2 - 10.1016/j.promfg.2020.08.112
DO - 10.1016/j.promfg.2020.08.112
M3 - Conference article
AN - SCOPUS:85099807215
SN - 2351-9789
VL - 50
SP - 625
EP - 629
JO - Procedia Manufacturing
JF - Procedia Manufacturing
T2 - 18th Metal Forming International Conference, Metal Forming 2020
Y2 - 13 September 2020 through 16 September 2020
ER -