Structural Bionic Design for Thin-walled Energy Absorber Tube and Parametric Analysis

2017 ◽  
Author(s):  
Zhengjian Feng ◽  
Zhangping Luo ◽  
Jinwu Xiang
Keyword(s):  
Parametric Analysis ◽  
Bionic Design ◽  
Energy Absorber ◽  
Thin Walled

Material Optimization for Design Improvement of Crash Energy Absorbers

2010 ◽  
Author(s):  
Hesham Ibrahim
Keyword(s):  
Impact Energy ◽  
Design Space ◽  
Thickness Distribution ◽  
Optimization Approach ◽  
Optimum Thickness ◽  
Energy Absorber ◽  
Design Improvement ◽  
Material Type ◽  
Thin Walled ◽  
Energy Absorbers

Crash energy absorbers in the form of thin walled tubes play a significant role in mitigating the harmful effects of frontal vehicles accidents on occupants. Specific energy absorbed (SEA), which is the ratio of impact energy absorbed to mass, is usually used to evaluate the efficiency of crash energy absorbers. A good design of a crash energy absorber must maximize the amount of impact energy that can be absorbed with a certain weight. The formal approach that has been used to improve the design of crash energy absorbers is to employ optimization to search for the optimum thickness distribution that maximizes SEA. This approach can be conceptualized as searching the design space in only one dimension (thickness). In this paper, a new dimension is added to the design space (material type). The proposed approach considers the type of material as a variable. An optimum design is then found by not only searching for the optimum thickness distribution, but also by selecting the optimum material type. The approach is demonstrated to the design improvement of a crash energy absorber in the form of a thin walled tube of square cross section. Steel and magnesium have been used as the two material alternatives. Magnesium has been selected due to its low density that had made it a promising candidate for use as a structural material in the automobile manufacturing. The results have shown that following the proposed technique, SEA has been increased by 54% compared to the value obtained through following the formal design optimization approach.

Structural bionic design for thin-walled cylindrical shell against buckling under axial compression

2011 ◽  
Vol 225 (11) ◽  
pp. 2619-2627 ◽  
Author(s):  
D Xing ◽  
W Chen ◽  
J Ma ◽  
L Zhao
Keyword(s):  
Cylindrical Shell ◽  
Axial Compression ◽  
Cross Section ◽  
Cylindrical Shells ◽  
High Load ◽  
Vascular Bundles ◽  
Bionic Design ◽  
Load Bearing ◽  
Thin Walled ◽  
The Cross

In nature, bamboo develops an excellent structure to bear nature forces, and it is very helpful for designing thin-walled cylindrical shells with high load-bearing efficiency. In this article, the cross-section of bamboo is investigated, and the feature of the gradual distribution of vascular bundles in bamboo cross-section is outlined. Based on that, a structural bionic design for thin-walled cylindrical shells is presented, of which the manufacturability is also taken into consideration. The comparison between the bionic thin-walled cylindrical shell and a simple hollow one with the same weight showed that the load-bearing efficiency was improved by 44.7 per cent.

Bionic design of thin-walled structure based on the geometry of the vascular bundles of bamboo

2020 ◽  
Vol 155 ◽  
pp. 106936 ◽  
Author(s):  
Felipe Luis Palombini ◽  
Jorge Ernesto de Araujo Mariath ◽  
Branca Freitas de Oliveira
Keyword(s):  
Vascular Bundles ◽  
Bionic Design ◽  
Thin Walled

Crashworthiness Optimization of a Vertex Fractal Hexagonal Structure

2019 ◽  
Vol 17 (07) ◽  
pp. 1950031 ◽  
Author(s):  
Yong Zhang ◽  
Ning He ◽  
Yubo Hou
Keyword(s):  
Numerical Modeling ◽  
Design Optimization ◽  
Automotive Industry ◽  
Experimental Analysis ◽  
Hexagonal Structure ◽  
Geometrical Parameters ◽  
Energy Absorber ◽  
Crashworthiness Optimization ◽  
Thin Walled Structures ◽  
Thin Walled

Thin-walled structures are used in automotive industry due to their excellent lightweight and crashworthiness properties. This paper proposes a vertex fractal multi-cell hexagonal structure to develop a novel lightweight energy absorber. Experimental analysis and numerical modeling are performed to investigate the crashworthiness of the fractal multi-cell hexagonal structures. The numerical results indicate that fractal configurations and geometrical parameters of the fractal hexagonal structure have significant effect on the crashworthiness. In addition, the multi-objective design optimization is performed to seek the optimal crashworthiness parameters and explore the optimal crashworthiness of the fractal hexagonal structure. The results show that the fractal multi-cell hexagonal structure outperforms non-fractal hexagonal structure.

Bionic design modification of non-convex multi-corner thin-walled columns for improving energy absorption through adding bulkheads

2015 ◽  
Vol 88 ◽  
pp. 70-81 ◽  
Author(s):  
Shutian Liu ◽  
Zeqi Tong ◽  
Zhiliang Tang ◽  
Yang Liu ◽  
Zonghua Zhang
Keyword(s):  
Energy Absorption ◽  
Bionic Design ◽  
Design Modification ◽  
Thin Walled

scholarly journals Oblique Impact on Crashworthiness: Review

2017 ◽  
Vol 4 (2) ◽  
pp. 32-48
Author(s):  
Tan Sze Pei ◽  
Siti Nadiah Mohd Saffe, ◽  
Siti Aishah Rusdan ◽  
Nurul Nadiah Nor Hamran
Keyword(s):  
Axial Loading ◽  
Oblique Impact ◽  
Loading Conditions ◽  
Structural Components ◽  
Energy Absorber ◽  
Oblique Loading ◽  
Foam Filled ◽  
Thin Walled ◽  
Collapse Behavior

This paper reviewed the crashworthiness of foam-filled thin-walled structure subjected to oblique loading conditions. Crashworthiness is the most important part in designing a safety vehicle, so, the types of collisions, crashworthiness parameter and the modes of collapse of structural components are included in this part. Secondly, the energy absorber regarding the axial loading and oblique loading in terms of geometry parameters and materials of the previous research is reviewed. In addition, the manufacturing and properties of aluminium foams with the collapse behavior of foam-filled structures are studied to understand the performance and the relation under loading.

Sign in / Sign up

Export Citation Format

Share Document