Out-of-plane dynamic crushing behavior of joint-based hierarchical honeycombs

2020 ◽  
pp. 109963622090978
Author(s):  
Yong Tao ◽  
Weiguo Li ◽  
Tianbao Cheng ◽  
Zhonggang Wang ◽  
Liming Chen ◽  
...  
Keyword(s):  
Out Of Plane ◽  
Crushing Behavior ◽  
Dynamic Crushing

Parameter Effects on Dynamic Crushing Behavior of Aluminum Staggered Kelvin Cellular Metal

2014 ◽  
Vol 703 ◽  
pp. 385-389 ◽  
Author(s):  
Xiao Bing Dang ◽  
Kai He ◽  
Jiu Hua Li ◽  
Qi Yang Zuo ◽  
Ru Xu Du
Keyword(s):  
Finite Element ◽  
Base Material ◽  
Element Model ◽  
Edge Length ◽  
Shell Elements ◽  
Structure Characteristics ◽  
Cellular Metal ◽  
Crushing Behavior ◽  
Full Factorial ◽  
Dynamic Crushing

This paper is aimed at investigating the parameter effects on dynamic crushing behavior of staggered Kelvin cellular metal using finite element method. The geometrical characteristics of the staggered cellular structure were analyzed and the finite element model was constructed using shell elements. A full factorial Design of Experiment simulation was carried out and four individual factors including two structure characteristics of the cellular metals and two mechanical parameters of the base material were selected, namely cell edge length, cell wall thickness, yield stress and tangent modulus. Their single and interaction effects on plateau stress, densification strain and densification strain energy were mainly researched. From the results it could be seen that the structure characteristics were a little more important than the base material properties for aluminum staggered Kelvin cellular metal.

Dynamic Crushing Behavior of the High-Density Closed-Cell Foams

2011 ◽  
Vol 306-307 ◽  
pp. 485-488
Author(s):  
Wei Chen ◽  
Zi Xing Lu
Keyword(s):  
Aspect Ratio ◽  
Loading Rate ◽  
High Density ◽  
Stress Strain ◽  
Constant Loading ◽  
Closed Cell ◽  
Crushing Behavior ◽  
Strain Model ◽  
Constant Loading Rate ◽  
Dynamic Crushing

The face-centered cubic model is used to investigate the dynamic crushing behavior of high density closed-cell foams. The influences of the constant loading rate and the specimen aspect ratio on the crushing stress were discussed. It is demonstrated that the crushing stress is more sensitive to the constant loading rate than the specimen aspect ratio. To describe the dynamic crushing behavior of the foam theoretically, the idealized rigid-perfectly plastic-locking (RPPL) stress-strain model is extended to a more general case, in which both the density and the cross-section area are discontinuous. The good agreement between the finite element results and theoretical results confirms that the dynamic crushing behavior of foam can be described by the modified RPPL stress-strain model.

Dynamic crushing behavior and energy absorption of graded lattice cylindrical structure under axial impact load

2018 ◽  
Vol 127 ◽  
pp. 333-343 ◽  
Author(s):  
Liming Chen ◽  
Jian Zhang ◽  
Bing Du ◽  
Hao Zhou ◽  
Houchang Liu ◽  
...  
Keyword(s):  
Energy Absorption ◽  
Impact Load ◽  
Axial Impact ◽  
Cylindrical Structure ◽  
Crushing Behavior ◽  
Graded Lattice ◽  
Dynamic Crushing

scholarly journals Inserting Stress Analysis of Combined Hexagonal Aluminum Honeycombs

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Xiangcheng Li ◽  
Kang Li ◽  
Yuliang Lin ◽  
Rong Chen ◽  
Fangyun Lu
Keyword(s):  
Structural Parameters ◽  
Base Material ◽  
Peak Stress ◽  
Displacement Curve ◽  
Out Of Plane ◽  
Aluminum Honeycomb ◽  
The One ◽  
Absorbing Property ◽  
Crushing Behavior ◽  
Energy Absorbing

Two kinds of hexagonal aluminum honeycombs are tested to study their out-of-plane crushing behavior. In the tests, honeycomb samples, including single hexagonal aluminum honeycomb (SHAH) samples and two stack-up combined hexagonal aluminum honeycombs (CHAH) samples, are compressed at a fixed quasistatic loading rate. The results show that the inserting process of CHAH can erase the initial peak stress that occurred in SHAH. Meanwhile, energy-absorbing property of combined honeycomb samples is more beneficial than the one of single honeycomb sample with the same thickness if the two types of honeycomb samples are completely crushed. Then, the applicability of the existing theoretical model for single hexagonal honeycomb is discussed, and an area equivalent method is proposed to calculate the crushing stress for nearly regular hexagonal honeycombs. Furthermore, a semiempirical formula is proposed to calculate the inserting plateau stress of two stack-up CHAH, in which structural parameters and mechanics properties of base material are concerned. The results show that the predicted stresses of three kinds of two stack-up combined honeycombs are in good agreement with the experimental data. Based on this study, stress-displacement curve of aluminum honeycombs can be designed in detail, which is very beneficial to optimize the energy-absorbing structures in engineering fields.

Combined Compression-Shear Behavior of Aluminum Honeycombs

2014 ◽  
Vol 626 ◽  
pp. 127-132 ◽  
Author(s):  
Asm Ashab ◽  
Dong Ruan ◽  
Guo Xing Lu ◽  
Yat C. Wong
Keyword(s):  
Mechanical Response ◽  
Indentation Load ◽  
Shear Loading ◽  
Plane Orientation ◽  
Out Of Plane ◽  
Aluminum Honeycomb ◽  
Good Energy ◽  
Plane Direction ◽  
Crushing Behavior ◽  
Naval Engineering

Aluminum honeycombs are lightweight and have good energy absorption capability. They are widely used in industrial products and also as core materials in various fields of engineering such as aerospace, automotive and naval engineering because of their high specific strengths and they can undergo large plastic deformation to absorb high impact energy. In the applications of aluminum honeycombs they are not only subjected to pure compressive or indentation load but sometime also under combined compression-shear load. The mechanical response and crushing behavior under combined compression-shear loading condition is still limited in literature. In this paper, quasi-static out-of-plane combined compression-shear tests were conducted to study the deformation mechanism of different types of HEXCELL® aluminum honeycombs with different cell sizes and wall thicknesses. Three types of aluminum honeycombs were used in this study. A universal MTS machine with specially designed fixtures was employed in the quasi-static loading tests. The experiments were conducted at three different loading angles, that is, 30°, 45° and 60° and in TL and TW (T is out-of-plane direction and L, W are the two in-plane directions) plane orientation loading directions of aluminum honeycomb. The effects of different loading angle and different plane orientation are reported in this experimental study. Similarly, the effects of cell size and cell wall thickness were also analyzed.

scholarly journals Numerical Investigation on Dynamic Crushing Behavior of Auxetic Honeycombs with Various Cell-Wall Angles

2014 ◽  
Vol 7 (2) ◽  
pp. 679678 ◽  
Author(s):  
Xin-chun Zhang ◽  
Hai-min Ding ◽  
Li-qiang An ◽  
Xiao-lei Wang
Keyword(s):  
Cell Wall ◽  
Numerical Investigation ◽  
Crushing Behavior ◽  
Dynamic Crushing

Dynamic crushing behavior of 3D closed-cell foams based on Voronoi random model

2010 ◽  
Vol 31 (9) ◽  
pp. 4281-4289 ◽  
Author(s):  
Yanze Song ◽  
Zhihua Wang ◽  
Longmao Zhao ◽  
Jian Luo
Keyword(s):  
Random Model ◽  
Closed Cell ◽  
Crushing Behavior ◽  
Dynamic Crushing
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