Mechanical response and strength characteristics of aluminum honeycomb sandwich panels for infrastructure engineering

Abstract The use of aluminium sandwich panels has been increased in a certain number of engineering applications from infrastructure systems and transportation to aircraft and naval engineering. Due to their structural efficiency these materials are ideal for applications where ratio of strength to weight is of crucial importance. In the current study the investigation of the strength characteristics of aluminium sandwich panels with aluminium honeycomb core and different types of skins is performed using both analytical models and experimental procedures. A series of strength tests such as tension, shear, three point bending and double cantilever beam were conducted on aluminium honeycomb-cored sandwich panel specimens with five different skins in order to examine the mode of failure and the mechanical behaviour of the structural elements. The experimental findings are compared to theoretical values while an attempt for the explanation of the mechanisms leading to failure such as buckling, delamination or debonding between core and skins is performed. The results occurring from the study are very useful for the enhancement of the mechanical behaviour of sandwich constructions, thus more intensive work must be carried out in order to understand the physical mechanisms leading to strength characteristics of sandwich panels.

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Strength Characteristics and Deformation Behavior of Aluminum Honeycomb Sandwich Plates under Three-Point Bending Loads

Key Engineering Materials - Advances in Fracture and Strength ◽

10.4028/0-87849-978-4.1503 ◽

2005 ◽

pp. 1503-1509

Author(s):

Hyoung Gu Kim ◽

Nak Sam Choi

Keyword(s):

Deformation Behavior ◽

Strength Characteristics ◽

Sandwich Plates ◽

Three Point Bending ◽

Honeycomb Sandwich ◽

Aluminum Honeycomb ◽

Bending Loads

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Large deformation of corrugated sandwich panels under three-point bending

Journal of Sandwich Structures & Materials ◽

10.1177/1099636220927650 ◽

2020 ◽

pp. 109963622092765 ◽

Cited By ~ 1

Author(s):

Fukun Xia ◽

Yvonne Durandet ◽

T X Yu ◽

Dong Ruan

Keyword(s):

Energy Absorption ◽

Specific Energy ◽

Mechanical Response ◽

Sandwich Panels ◽

Deformation Mode ◽

Theoretical Models ◽

Peak Force ◽

Specific Energy Absorption ◽

Three Point Bending ◽

Core Height

Corrugated sandwich panels are widely used in engineering applications for their excellent energy absorption and lightweight. In this research, the mechanical response of aluminum corrugated sandwich panels subjected to three-point bending is investigated experimentally, numerically, and theoretically. In the experiments, the sandwich panels were loaded under two conditions, namely base indentation and node indentation. A parametric study is conducted by ABAQUS/explicit to investigate the effects of geometric configurations (corrugation angle, core height, and core thickness) on the deformation mode, peak force, and energy absorption. Both peak force and specific energy absorption vary with the geometric parameters. Theoretical models are further developed to predict the force–displacement curves of the panels under the two loading conditions. The theoretically predicted crushing force is in good agreement with both the experimental and simulated results. Finally, the non-dominated sorting genetic algorithm II is adopted to optimize the geometric configuration to improve the specific energy absorption and reduce the weight of corrugated sandwich panels.

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Combined Compression-Shear Behavior of Aluminum Honeycombs

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.626.127 ◽

2014 ◽

Vol 626 ◽

pp. 127-132 ◽

Cited By ~ 3

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.

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A Novel Implementation of the LDEM in the Ansys LS-DYNA Finite Element Code

Materials ◽

10.3390/ma14247792 ◽

2021 ◽

Vol 14 (24) ◽

pp. 7792

Author(s):

Andrea Zanichelli ◽

Angélica Colpo ◽

Leandro Friedrich ◽

Ignacio Iturrioz ◽

Andrea Carpinteri ◽

...

Keyword(s):

Finite Element ◽

Fracture Behaviour ◽

Sandwich Panels ◽

Experimental Tests ◽

Finite Element Code ◽

Three Point Bending ◽

Four Point Bending ◽

Experimental Findings ◽

The University ◽

Bending Failure

In this paper, a novel implementation of the Lattice Discrete Element Method (LDEM) is proposed: in particular, the LDEM is implemented in the Ansys LS-DYNA finite element code. Such an implementation is employed to evaluate the fracture behaviour of sandwich panels under bending. First, the novel hybrid model proposed is validated by simulating some three-point bending experimental tests carried out at the University of Parma, and then it is used to model the fracture behaviour of sandwich panels under four-point bending. Failure mechanisms, damage locations, and load-deflection curves are numerically determined by employing such a novel model, and the results show a good agreement with the available experimental findings.

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Strength Characteristics and Deformation Behavior of Aluminum Honeycomb Sandwich Plates under Three-Point Bending Loads

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.297-300.1503 ◽

2005 ◽

Vol 297-300 ◽

pp. 1503-1509

Author(s):

Hyoung Gu Kim ◽

Nak Sam Choi

Keyword(s):

Failure Modes ◽

Skin Layer ◽

Strength Characteristics ◽

Sandwich Plates ◽

Honeycomb Core ◽

Three Point Bending ◽

Honeycomb Sandwich ◽

Aluminum Honeycomb ◽

Deformation Behaviors ◽

Bending Loads

The strength characteristics as well as local deformation behaviors of honeycomb sandwich composite (HSC) structures under three-point bending loads were investigated in consideration of various failure modes such as skin layer yielding, interface-delamination as well as shear deformation and local buckling in the core layer. Various types of aluminum honeycomb core and skin layer were used for this study. Their finite-element simulation was performed to analyze stresses and deformation behaviors of honeycomb sandwich plates. The results were very comparable to the experimental ones. Consequently, thicker skin layer, smaller cell size of honeycomb core and less delamiantion had dominant effects on the improvement in strength and deformation behaviors of honeycomb sandwich plates.

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The strength characteristics of aluminum honeycomb sandwich panels

Thin-Walled Structures ◽

10.1016/s0263-8231(99)00026-9 ◽

1999 ◽

Vol 35 (3) ◽

pp. 205-231 ◽

Cited By ~ 135

Author(s):

Jeom Kee Paik ◽

Anil K Thayamballi ◽

Gyu Sung Kim

Keyword(s):

Sandwich Panels ◽

Strength Characteristics ◽

Honeycomb Sandwich ◽

Aluminum Honeycomb

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Mechanical Response of Porous Copper Manufactured by Lost Carbonate Sintering Process

Materials Science Forum ◽

10.4028/www.scientific.net/msf.539-543.1863 ◽

2007 ◽

Vol 539-543 ◽

pp. 1863-1867 ◽

Cited By ~ 6

Author(s):

X.F. Tao ◽

Li Ping Zhang ◽

Y.Y. Zhao

Keyword(s):

Particle Size ◽

Flexural Strength ◽

Relative Density ◽

Mechanical Response ◽

Compaction Pressure ◽

Absorption Capacity ◽

Energy Absorption Capacity ◽

Three Point Bending ◽

Porous Copper ◽

The Impact

This paper investigated the mechanical response of porous copper manufactured by LCS under three-point bending and Charpy impact conditions. The effects of the compaction pressure and K2CO3 particle size used in producing the porous copper samples and the relative density of the samples were studied. The apparent modulus, flexural strength and energy absorption capacity in three-point bending tests increased exponentially with increasing relative density. The impact strength was not markedly sensitive to relative density and had values within 7 – 9 kJ/m2 for the relative densities in the range 0.17 – 0.31. The amount of energy absorbed by a porous copper sample in the impact test was much higher than that absorbed in the three-point bending test, impling that loading strain rate had a significant effect on the deformation mechanisms. Increasing compaction pressure and increasing K2CO3 particle size resulted in significant increases in the flexural strength and the bending energy absorption capacity, both owing to the reduced sintering defects.

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Virtual trabecular bone models and their mechanical response

Proceedings of the Institution of Mechanical Engineers Part H Journal of Engineering in Medicine ◽

10.1243/09544119jeim408 ◽

2008 ◽

Vol 222 (8) ◽

pp. 1185-1195 ◽

Cited By ~ 5

Author(s):

F E Donaldson ◽

P Pankaj ◽

A H Law ◽

A H Simpson

Keyword(s):

Finite Element ◽

Trabecular Bone ◽

Mechanical Behaviour ◽

Mechanical Response ◽

Elastic Response ◽

Anatomical Site ◽

Virtual Samples ◽

Micro Level ◽

Architectural Characteristics

The study of the mechanical behaviour of trabecular bone has extensively employed micro-level finite element (μFE) models generated from images of real bone samples. It is now recognized that the key determinants of the mechanical behaviour of bone are related to its micro-architecture. The key indices of micro-architecture, in turn, depend on factors such as age, anatomical site, sex, and degree of osteoporosis. In practice, it is difficult to acquire sufficient samples that encompass these variations. In this preliminary study, a method of generating virtual finite element (FE) samples of trabecular bone is considered. Virtual samples, calibrated to satisfy some of the key micro-architectural characteristics, are generated computationally. The apparent level elastic and post-elastic mechanical behaviour of the generated samples is examined: the elastic mechanical response of these samples is found to compare well with natural trabecular bone studies conducted by previous investigators; the post-elastic response of virtual samples shows that material non-linearities have a much greater effect in comparison with geometrical non-linearity for the bone densities considered. Similar behaviour has been reported by previous studies conducted on real trabecular bone. It is concluded that virtual modelling presents a potentially valuable tool in the study of the mechanical behaviour of trabecular bone and the role of its micro-architecture.

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