Mechanical behaviour of a creased thin strip

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 elasticperfect 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.Published by Copernicus Publications.

On sound insulation of pyramidal lattice sandwich structure

“…magnetorheological fluids, has been actively investigated as this method has combined the merits of the passive method and active method. Another research will concentrate on the semi-active sound insulation method based on the origami/kirigami-based sandwich structures or metamaterials [32][33][34][35][36] in the future.…”

CFRP Origami Metamaterial with Tunable Buckling Loads: A Numerical Study

“…Although topology optimization can achieve novel designs that possess excellent buckling resistance ability, the buckling load is determined and hard to change once designed. However, a tunable mechanical property is in higher demand, which is generally realized by structural design with multiple materials [ 10 , 11 ] or the origami technique [ 12 , 13 ]. The latter is considered in this study.…”

Revealing the Dynamic Characteristics of Composite Material-Based Miura-Origami Tube

“…Some representative works are as follows: Lv [ 24 ] and co-workers studied the mechanical properties of periodically-arranged Miura sheets and found that the Miura sheet model can achieve both positive and negative Poisson ratios, which is consistent with its shear behavior and infinite bulk elastic modulus; in this study, a Miura sheet was considered to be a rigid origami structure, i.e., during the folding process, the facets between creases were not allowed to deform. Since then, more and more researchers have studied the stiffness characteristics of non-periodic origami structures and their load-bearing capacity, demonstrating their exotic mechanical properties [ 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 ]. Liu et al [ 25 ] numerically and experimentally studied the deformation laws and energy-absorbing capacity of Miura sheets made of polymers under different loading conditions; the outcomes revealed that the dynamic properties of the Miura sheet can be broadly tailored.…”

“…Zhou et al [ 10 ] designed experiments to study the brace hysteretic behavior of a novel origami energy dissipation brace, formed by a combination of Miura and Tachi unit cells. Nevertheless, most of the aforementioned origami metamaterials are composed of open Miura origami, which obviously has a relatively poor out-of-plane stiffness [ 31 ], leading to limitations to engineering applications.…”