Study on large deformation mechanism and thickness effect of irregular bellows under buckling mode defect and Riks post-buckling analysis
Tian Xiangyu
Guo XiangYing
Zhang Wanxin
Li Yuanfeng
Li Jian
Abstract：Ripple structure is widely used in space suits,and the predicted trajectory motion is realized according to its large deformation behavior.Due to the complexity of irregular bellows structure,the existing researches are mostly based on the display dynamic method,and lack the systematic analysis of geometric nonlinearity and the effect of shell section thickness under the framework of statics.This study combines statics and arc length method(Riks),introduces linear buckling mode defects,and analyzes the ultimate bending behavior of irregular bellows with different shell thicknesses.It is concluded that the thick-shell model exhibits higher apparent deformation tolerance due to geometric softening effect,and the contact force distribution between ripples can be accurately extracted by static analysis,which provides a basis for the inversion of external force loads.The deformation mode of bellows after introducing defects based on statics-Riks is proposed,and the control mechanism of shell section thickness on deformation path is revealed.
Keywords：irregular bellowsimplicit analysisarc length methodbuckling modedefect factornonlinear deformation
Publication Date：2025-04-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 123-128 )