The energy-absorbing properties of composite tube-reinforced aluminum honeycomb

2017 ◽  
Vol 176 ◽  
pp. 630-639 ◽  
Author(s):  
A. Al Antali ◽  
R. Umer ◽  
J. Zhou ◽  
W.J. Cantwell
Keyword(s):  
Composite Tube ◽  
Aluminum Honeycomb ◽  
Energy Absorbing

scholarly journals Numerical Simulation on In-plane Deformation Characteristics of Lightweight Aluminum Honeycomb under Direct and Indirect Explosion

Materials ◽  
2019 ◽  
Vol 12 (14) ◽  
pp. 2222 ◽  
Author(s):  
Xiangcheng Li ◽  
Yuliang Lin ◽  
Fangyun Lu
Keyword(s):  
Plane Deformation ◽  
Buffering Capacity ◽  
Response Mode ◽  
Deformation Characteristics ◽  
Rigid Plate ◽  
Dynamic Impact ◽  
Aluminum Honeycomb ◽  
Energy Absorbing ◽  
Deformation Modes ◽  
Better Than

Lightweight aluminum honeycomb is a buffering and energy-absorbed structure against dynamic impact and explosion. Direct and indirect explosions with different equivalent explosive masses are applied to investigate the in-plane deformation characteristics and energy-absorbing distribution of aluminum honeycombs. Two finite element models of honeycombs, i.e., rigid plate-honeycomb-rigid plate (RP-H-RP) and honeycomb-rigid plate (H-RP) are created. The models indicate that there are three deformation modes in the X1 direction for the RP-H-RP, which are the overall response mode at low equivalent explosive masses, transitional response mode at medium equivalent explosive masses, and local response mode at large equivalent explosive masses, respectively. Meanwhile, the honeycombs exhibit two deformation modes in the X2 direction, i.e., the expansion mode at low equivalent explosive masses and local inner concave mode at large equivalent explosive masses, respectively. Interestingly, a counter-intuitive phenomenon is observed on the loaded boundary of the H-RP. Besides, the energy distribution and buffering capacity of different parts on the honeycomb models are discussed. In a unit cell, most of the energy is absorbed by the edges with an edge thickness of 0.04 mm while little energy is absorbed by the other bilateral edges. For the buffering capacity, the honeycomb in the X1 direction behaves better than that in the X2 direction.

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.

Cushioning and Energy Absorbing Property of Combined Aluminum Honeycomb

2015 ◽  
Vol 17 (10) ◽  
pp. 1434-1441 ◽  
Author(s):  
Yu-Liang Lin ◽  
Zhi-Feng Zhang ◽  
Rong Chen ◽  
Yan Li ◽  
Xue-Jun Wen ◽  
...  
Keyword(s):  
Aluminum Honeycomb ◽  
Absorbing Property ◽  
Energy Absorbing

Composite energy-absorbing structures combining thin-walled metal and honeycomb structures

2016 ◽  
Vol 231 (4) ◽  
pp. 394-405 ◽  
Author(s):  
Hui Zhou ◽  
Ping Xu ◽  
Suchao Xie
Keyword(s):  
Metal Structure ◽  
Honeycomb Structure ◽  
Railway Vehicle ◽  
Hardening Material ◽  
Honeycomb Structures ◽  
Anisotropic Mechanical Properties ◽  
Aluminum Honeycomb ◽  
Thin Walled ◽  
Energy Absorbing ◽  
Composite Energy

The energy-absorbing structure of a crashworthy railway vehicle was designed by combining the characteristics of thin-walled metal structures and aluminum honeycomb structures: finite element models of collisions involving energy-absorbing structures were built in ANSYS/LS-DYNA. In these models, the thin-walled metal structure was modeled as a plastic kinematic hardening material, and the honeycomb structure was modeled as an equivalent solid model with orthotropic–anisotropic mechanical properties. The analysis showed that the safe velocity standard for rail vehicle collisions was improved from 25 km/h to 45 km/h by using a combined energy-absorbing structure; its energy absorption exceeded the sum of the energy absorbed by the thin-walled metal structure and honeycomb structure when loaded separately, because of the interaction effects of thin-walled metal structure and aluminum honeycomb structure. For an aluminum honeycomb to the same specification, the composite structure showed the highest SEA when using a thin-walled metal structure composed of bi-grooved tubes, followed by that using single-groove tubes: that with a straight-walled structure had the lowest SEA.

The energy-absorbing characteristics of composite tube-reinforced foam structures

2014 ◽  
Vol 61 ◽  
pp. 127-135 ◽  
Author(s):  
R.A. Alia ◽  
W.J. Cantwell ◽  
G.S. Langdon ◽  
S.C.K. Yuen ◽  
G.N. Nurick
Keyword(s):  
Composite Tube ◽  
Energy Absorbing

Experimental Study of Energy Absorption of Fluid-Filled Honeycomb Structure

2014 ◽  
Author(s):  
S. Jenson ◽  
M. Ali ◽  
K. Alam ◽  
J. Hoffman
Keyword(s):  
Energy Absorption ◽  
High Speed ◽  
Honeycomb Structure ◽  
High Speed Camera ◽  
Damage Area ◽  
Impact Forces ◽  
Aluminum Honeycomb ◽  
Energy Absorbing ◽  
The Impact ◽  
Absorption Characteristics

The work presented here is a continuation of the study performed in exploring the energy absorption characteristics of non-Newtonian fluid-filled regular hexagonal aluminum honeycomb structures. In the previous study, energy absorbing properties were investigated by using an air powered pneumatic ram, dynamic load cell, and a high speed camera. This study was conducted using a pneumatic ram which was designed to exploit only its kinetic energy during the impact. Experimental samples included an empty honeycomb sample and a filled sample as the filled samples showed the largest difference in energy absorption with respect to the empty samples in the previous study. Therefore, the filled samples were further investigated in this study by measuring the impact forces at the distal end as well as the damage on the impact end. Upon impact, the filled samples were able to reduce the damage area on impact end and were able to lower average and peak forces by 71.9% and 77.4% at the distal end as compared to the empty sample.

Effects of Functionally Graded Cellular Core on Energy Absorption Response of Thin Walled Composite Axial Members

2016 ◽  
Author(s):  
Muhammad Ali ◽  
Khairul Alam ◽  
Eboreime Ohioma
Keyword(s):  
Energy Absorption ◽  
Compressive Loading ◽  
Deformation Mode ◽  
High Energy ◽  
Steel Tube ◽  
Absorption Capacity ◽  
Functionally Graded ◽  
Composite Tube ◽  
Thin Walled ◽  
Energy Absorbing

Thin walled axial members are typically used in vehicles’ side and front chassis to improve crashworthiness. Extensive work has been done in exploring energy absorbing characteristics of thin walled structural members under axial compressive loading. The present study is a continuation of the work presented earlier on evaluating the effects of presence of functionally graded cellular structures in thin walled members. A functionally graded aluminum cellular core in compact form was placed inside a steel square tube. The crushing behavior was modeled using ABAQUS/Explicit module. The variables affecting the energy absorbing characteristics, for example, deformation or collapsing modes, crushing/ reactive force, plateau stress level, and energy curves, were studied. An approximate 35% increase in the energy absorption capacity of steel tube was observed by adding aluminum graded cellular structure to the square tube. The aluminum graded structure crushed systematically in a layered manner and its presence as core supported the steel square tube side walls in transverse direction and postponed the local (tube) wall collapse. This resulted in composite tube undergoing larger localized folds as compared to highly compact localized folds, which appeared in the steel tube without any graded core. The variation in deformation mode resulted in increased stiffness of the composite structure, and therefore, high energy absorption by the structure. Further, a relatively constant crushing force was observed in the composite tube promoting lower impulse. This aspect has a potential to be exploited to improve the crashworthiness of automobile structures.

The energy-absorbing behaviour of composite tube-reinforced foams

2018 ◽  
Vol 139 ◽  
pp. 227-237 ◽  
Author(s):  
J. Zhou ◽  
Z. Guan ◽  
W.J. Cantwell
Keyword(s):  
Composite Tube ◽  
Energy Absorbing

Energy Absorbing Characteristics of GF/Nylon Tubes

1998 ◽  
Vol 47 (5) ◽  
pp. 458-463
Author(s):  
Hiroyuki KAWADA ◽  
Takeshi HONDA ◽  
Maiko TAKASHIMA ◽  
Hajime SATOH
Keyword(s):  
Energy Absorbing
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