scholarly journals Quasi-static axial crushing of hexagonal origami crash boxes as energy absorption devices

2019 ◽  
Vol 10 (1) ◽  
pp. 133-143 ◽  
Author(s):  
Jiayao Ma ◽  
Huaping Dai ◽  
Mengyan Shi ◽  
Lin Yuan ◽  
Yan Chen ◽  
...  
Keyword(s):  
Energy Absorption ◽  
Reasonable Agreement ◽  
Low Cost ◽  
Absorption Efficiency ◽  
Numerical Results ◽  
Peak Force ◽  
Axial Crushing ◽  
Energy Absorption Efficiency ◽  
Absorption Performance ◽  
Initial Peak

Abstract. Thin-walled tubes are widely used as energy absorption devices for their low cost and high manufacturability. Introduction of the origami technique enables the tube to follow a pre-determined failure mode and to improve its energy absorption efficiency. This paper examines the energy absorption characteristics of the origami crash box under quasi-static axial crushing. Both experimental and numerical results show that the origami pattern develops a diamond-shaped mode, bringing a reduction in initial peak force and a significant increase in energy absorption compared to the conventional hexagonal tube. The sensitivity of its energy absorption performance to various parameters is studied, and it is shown to achieve 68.29 % increase in the specific energy absorption and 13.91 % reduction in the initial peak force in the optimal case. Furthermore, an analytical solution is presented for the energy absorption, which achieves reasonable agreement with the numerical results.

Energy Absorption of Origami Crash Box: Numerical Simulation and Theoretical Analysis

2018 ◽  
Author(s):  
Mengyan Shi ◽  
Jiayao Ma ◽  
Yan Chen ◽  
Zhong You
Keyword(s):  
Energy Absorption ◽  
Theoretical Study ◽  
Low Cost ◽  
Deformation Mode ◽  
Absorption Efficiency ◽  
Great Promise ◽  
Good Match ◽  
Energy Absorption Efficiency ◽  
Thin Walled ◽  
Initial Peak

Thin-walled tubes as energy absorption devices are widely in use for their low cost and high manufacturability. Employing origami technique on a tube enables induction of a predetermined failure mode so as to improve its energy absorption efficiency. Here we study the energy absorption of a hexagonal tubular device named the origami crash box numerically and theoretically. Numerical simulations of the quasi-static axial crushing show that the pattern triggers a diamond-shaped mode, leading to a substantial increase in energy absorption and reduction in initial peak force. The effects of geometric parameters on the performance of the origami crash box are also investigated through a parametric study. Furthermore, a theoretical study on the deformation mode and energy absorption of the origami crash box is carried out, and a good match with numerical results is obtained. The origami crash box shows great promise in the design of energy absorption devices.

Bending Behavior of Simply-Supported Sandwich Beams Subjected to Large Deflection

2018 ◽  
Vol 777 ◽  
pp. 569-574
Author(s):  
Zhong You Xie
Keyword(s):  
Energy Absorption ◽  
Large Deflection ◽  
Absorption Efficiency ◽  
Sandwich Beams ◽  
Element Simulation ◽  
Energy Absorption Efficiency ◽  
Load Carrying ◽  
Absorption Performance ◽  
Bending Behavior ◽  
The Moment

Due to thin skins and soft core, it is apt to local indentation inducing the concurrence of geometrical and material nonlinearity in sandwich structures. In the paper, finite element simulation is used to investigate the bending behavior of lightweight sandwich beams under large deflection. A modified formulation for the moment at mid-span section of sandwich beams under large deflection is presented, and energy absorption performance is assessed based on energy absorption efficiency. In addition, it is found that no local indentation arises initially, while later that increases gradually with loading displacement increasing. The height of the mid-span section as well as load-carrying capacity decreases significantly with local indentation depth increasing.

Energy absorption capability of origami automobile bumper system

2019 ◽  
Vol 233 (18) ◽  
pp. 6577-6587
Author(s):  
Lin Yuan ◽  
Jiayao Ma ◽  
Zhong You
Keyword(s):  
Energy Absorption ◽  
High Speed ◽  
Failure Modes ◽  
Absorption Efficiency ◽  
Vital Role ◽  
Vehicle Safety ◽  
Energy Absorption Efficiency ◽  
Stable Performance ◽  
Absorption Performance ◽  
Bumper System

The crashworthiness of an automobile bumper plays a vital role in overall vehicle safety. Energy absorption efficiency, as well as predictable and stable performance, are the most demanding features in the design of the bumper system. To this end, this paper presents a series of innovative bumper designs using built-in origami patterns. Also, we outline a numerical framework for evaluating the energy absorption performance of a bumper when subjected to an impact loading. Comparative analyses on full frontal and 40% offset frontal impact tests are conducted numerically for both low and high-speed scenarios. It is found that the designed failure modes are successfully triggered and followed during the collision process for the combined origami beam-origami crash box design. Most importantly, this optimal design could absorb 31.5% more energy than the conventional bumper.

Axial Crushing of Thin-Walled Tubes With Kite-Shape Pattern

2015 ◽  
Author(s):  
Degao Hou ◽  
Yan Chen ◽  
Jiayao Ma ◽  
Zhong You
Keyword(s):  
Energy Absorption ◽  
Peak Force ◽  
Great Promise ◽  
Axial Crushing ◽  
Crushing Force ◽  
Collapse Mode ◽  
Shape Pattern ◽  
The Mean ◽  
Thin Walled ◽  
Initial Peak

Thin-walled tubes are widely used as energy absorption devices in automobiles, designed to protect the costly structures and people inside during an impact event through plastic deformation. They show excellent performance under axial loading in terms of weight efficiency, stroke distance and total energy absorption, but also have the disadvantage that the crushing force is not uniform during deformation process, especially with the existence of a high initial peak force. Recently, pattern design on tubular structures has received increasing attention. It has been found that, if the surface of a tube is pre-folded according to an origami pattern, the collapse mode of the tube can be altered, leading to changes in energy absorption performance. In this paper, we present a series of origami patterned tubes with a kite-shape pattern that is constructed by joining two pieces of Miura-ori. First of all, the geometry of the pattern is presented. We develop a theoretical model to predict the energy absorption associated with the axial crushing of the patterned tubes and derive a mathematical formula to calculate the mean crushing force accordingly. Secondly, a family of origami tubes with various profiles are designed, and their performances subjected to quasi-static axial crushing are numerically investigated. A parametric study is also conducted to establish the relationship between the pre-folded angle of the pattern and the initial peak force as well as the mean crushing force. Numerical results show that introducing patterns to thin-walled tubes offers three advantages in comparison with conventional tubes, i.e., a lower initial peak force, a more uniform crushing load, and a stable and repeatable collapse mode. A 36.0% increase in specific energy absorption and 67.2% reduction in initial peak force is achieved in the optimum case. The new origami patterned tubes show great promise as energy absorption devices.

EXPERIMENTAL INVESTIGATION ON THE MAXIMUM AXIAL FORCE OF AN ALUMINUM SQUARE COLUMN

2015 ◽  
Vol 76 (11) ◽  
Author(s):  
Hafizi Lukman ◽  
Amir Radzi Ab. Ghani ◽  
Hafizan Hashim ◽  
Mohd Adzureen Bin Zulkefli ◽  
M Mahat
Keyword(s):  
Energy Absorption ◽  
Design Patterns ◽  
High Performance ◽  
Low Cost ◽  
Transportation Systems ◽  
Peak Force ◽  
Thin Wall ◽  
Specific Energy Absorption ◽  
Wall Structures ◽  
Initial Peak

Energy absorption is one of the characteristics that must be included especially in transportation systems. This property dissipates kinetic energy during collisions. Normally, industries use thin wall structures because of their ease of fabrication, high performance, and low cost. This study determines the first peak force and energy absorption of an aluminum square column. The square columns prepared with various design patterns exhibited different results. The designs showed favorable results in terms of increasing the specific energy absorption and reducing the initial peak force. To achieve the project objective, this project conducted two types of analyses using INSTRON 3382 for the experimental analysis.

A Novel Origami Crash Box With Varying Profiles

2013 ◽  
Author(s):  
Jiayao Ma ◽  
Zhong You
Keyword(s):  
Numerical Simulation ◽  
Energy Absorption ◽  
Cross Sections ◽  
Peak Force ◽  
Geometric Imperfection ◽  
Axial Crushing ◽  
Collapse Mode ◽  
Thin Walled Tube ◽  
Thin Walled ◽  
Initial Peak

Crash boxes in automobiles are often made from thin-walled tubes. They are designed to absorb energy when subjected to axial crushing. In this paper we present a novel crash box known as the origami crash box. It is produced by pre-folding the surface of a thin-walled tube according to a developable origami pattern. The pre-folded surface serves both as a type of geometric imperfection to lower the initial peak force, and as a mode inducer to trigger a collapse mode that is more efficient in terms of energy absorption. Numerical simulation of quasi-static axial crushing of the origami crash box has shown that a new collapse mode deemed the completed diamond mode can be triggered in tubes with square, rectangular, and polygonal cross sections and tapered shapes, leading to both a substantial gain in overall energy absorption, while at the same time, a reduction in initial peak force.

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