Exploring the design space for nonlinear buckling of composite thin-walled lenticular tubes under pure bending

This paper presents an automatic finite element simulation scheme accounting for high geometric nonlinearity and the difference between linear nonlinear buckling of composite thin-walled lenticular tubes (CTLTs). Parameterizing cross-section shapes generation design space CTLTs with both circular parabolic arcs were accomplished, several key factors identified, in particular contrary effect lumbus length coefficient on bending stiffness anisotropy. The first quantitative comparison triangular rollable collapsible (TRAC) booms is given terms performance two directions, showing that optimal CTLT carefully selected from demonstrates a comparable or even better than TRAC boom. great importance academic engineering perspectives. Our efforts enhance understanding post-buckling behavior CTLTs, provide guidelines future desirable performance.