Folded Structures Lab

Research Group at the University of Queensland

Thin-Walled Mechanics

Behaviours of Thin-Walled Folded Structures

Elastic Buckling Shape Control

Curved-crease origami can control the shape of elatically-buckled tubes. By using pre-embedded curved-crease origami patterns in thin-walled cylinders, the failure mode can be pre-determined as a stabilized high-order elastica surface, which manifests via a diamond buckling mode. Measurements of the deformed surface show the buckled shapes to have a near-exact correspondence to the analytical curved-crease origami description. Further information: DOI: 10.1016/j.ijmecsci.2018.11.005.

Rotational Stiffness in Steel Fold Lines

Digitally-fabricated hinge lines for folded steel structures enable simple, fast, and accurate assembly of complex folded and origami-inspired forms. They also enable reliable control and prediction of hinge stiffness attributes, so that the behaviours of folded structures can be rapidly simulated using simplified analysis techniques. A structural characterisation was developed for these hinges, with several key advances in knowledge related to their elastic-plastic rotational behaviour and folding mechanics, including thick panel clash behaviour. An ‘over-kerf’ manufacturing strategy was developed to eliminate this clash behaviour in steel plate up to 3mm thick. Further information: DOI:10.1016/j.engstruct.2020.110218.

Propagation Buckling

Origami-inspired tubular geometries possess a geometric texturing than can improve resistance to propagation buckling failures in pipelines. Experimental and numerical investigations both showed that this behaviour also occurs in localized instabilities (bulging) of elastic textured tubes, with an increase in critical and propagation pressures as compared to smooth tubes. Further information: DOI: 10.1016/j.ijmecsci.2016.07.026.