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Mech. Sci., 9, 91-102, 2018
https://doi.org/10.5194/ms-9-91-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
20 Feb 2018
Mechanical behaviour of a creased thin strip
Jie Liu1,2, Shanqing Xu1, Guilin Wen2, and Yi Min Xie1,3 1Centre for Innovative Structures and Materials, School of Engineering, RMIT University, Melbourne 3001, Australia
2State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China
3XIE Archi-Structure Design (Shanghai) Co., Ltd., Shanghai 200092, China
Abstract. In this study the mechanical behaviour of a creased thin strip under opposite-sense bending was investigated. It was found that a simple crease, which led to the increase of the second moment of area, could significantly alter the overall mechanical behaviour of a thin strip, for example the peak moment could be increased by 100 times. The crease was treated as a cylindrical segment of a small radius. Parametric studies demonstrated that the geometry of the strip could strongly influence its flexural behaviour. We showed that the uniform thickness and the radius of the creased segment had the greatest and the least influence on the mechanical behaviour, respectively. We further revealed that material properties could dramatically affect the overall mechanical behaviour of the creased strip by gradually changing the material from being linear elastic to elastic-perfect plastic. After the formation of the fold, the moment of the two ends of the strip differed considerably when the elasto-plastic materials were used, especially for materials with smaller tangent modulus in the plastic range. The deformation patterns of the thin strips from the finite element simulations were verified by physical models made of thin metal strips. The findings from this study provide useful information for designing origami structures for engineering applications using creased thin strips.

Citation: Liu, J., Xu, S., Wen, G., and Xie, Y. M.: Mechanical behaviour of a creased thin strip, Mech. Sci., 9, 91-102, https://doi.org/10.5194/ms-9-91-2018, 2018.
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Short summary
The mechanical behaviour of a creased thin strip under opposite-sense bending was investigated,revealing that a simple crease could significantly alter the overall mechanical behaviour of a thin strip. The influence of the geometrical parameters on the mechanical behaviour of the creased strip was studied. The deformation patterns of the thin strips from the finite element simulations were verified by physical models made from thin metal strips.
The mechanical behaviour of a creased thin strip under opposite-sense bending was...
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