Optimum honeycomb filled crash absorber design

Zarei, Hamid Reza; Kröger, Matthias

doi:10.1016/j.matdes.2006.10.013

Cited by 141 publications

(88 citation statements)

References 18 publications

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“…Extensive investigations into various honeycomb filled structures have been performed over the years [23,10,24,25]. Structures such as hexagonal tubes, circular tubes and bi-hexagonal tubes have been compared.…”

Section: Introductionmentioning

confidence: 99%

“…According to [26] structures absorb significantly more energy when loaded axially. Comparing results from different studies [10,24,25], it is possible to conclude that specific energy absorption (SEA) increases as the density of the cell increases. However, structures with dense honeycomb fillers perform poorly since they are not suitable for different types of impact loading [25].…”

Section: Introductionmentioning

confidence: 99%

“…However, structures with dense honeycomb fillers perform poorly since they are not suitable for different types of impact loading [25]. Optimised versions, where the weight and geometry of the honeycomb filled structures have been optimised for a certain scenario, as discussed in [9,10], show marginally better performance than non-optimised structures [25].…”

Section: Introductionmentioning

confidence: 99%

“…Studies dedicated to material variation [7,10,20,24,25] show that aluminium alloy is the most commonly used material for both main structure and fillers. Study from [27] shows that steel has higher energy absorption per unit weight than aluminium alloy.…”

Section: Introductionmentioning

confidence: 99%

“…Foam and honeycombs are the most commonly found fillers in modern industry [10,24,25,29,30]. Without the addition of significant weight to the main structure these fillings are found to provide a significant improvement in energy absorption capability [30].…”

Section: Introductionmentioning

confidence: 99%

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Application of smart honeycomb structures for automotive passive safety

Ganilova

Low

2017

Proceedings of the Institution of Mechanical Engineers, Part D:

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Nowadays, most energy absorbing devices used in industry absorb energy through permanent deformation. In some cases, consumers have to repair or even replace energy absorbers even after a mild collision. The work presented in this paper proposes a novel re-usable solution in the form of a hybrid bumper-crush can design where a recoverable structure is integrated into the bumper beam and crush can for a mild collision situation in addition to the traditional energy absorbers recommended for more severe collisions. The main investigation is focused around the performance and optimisation of Negative Stiffness honeycomb, the recoverable structure and honeycomb-filled elements. A comprehensive study was undertaken to investigate numerically the behaviour of these energy absorbing structures under crash conditions, corresponding to real scenarios and simulated using a specially developed finite element model.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Application of smart honeycomb structures for automotive passive safety

Ganilova

Low

2017

Proceedings of the Institution of Mechanical Engineers, Part D:

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Microstructure and Compression Strength of Novel TRIP‐Steel/Mg‐PSZ Composites

et al. 2009

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Powder metallurgy is a widely used technology to produce metal and composite components, respectively. This technology has a high efficiency in terms of material and offers the possibility to produce materials which cannot be formed by conventional techniques. In the field of metal matrix composites, hard metals are well-known examples. Other metal matrix composite materials offer high strength, wear resistance, and/or stiffness values combined with significant ductility or toughness, respectively.Most composite materials are based on light metal matrices as aluminum or titanium. However, iron-based composites have drawn only limited attention until now. Nevertheless, some examples of steel-based composite materials are presented in literature with high wear resistance or strength, respectively. [1][2][3][4][5] In the last decade several scientists have investigated different composite materials and micro-and macrostructure designs according to their ''crashworthiness.'' [6,7] Crashworthiness is the absorption of mechanical energy through controlled failure mechanisms and modes that enable a defined load profile during energy absorption. The specific energy absorption (SEA) per unit mass, the SEA per unit volume as well as the interlaminar fracture toughness as a ratio of the fracture toughness parameter to the Young's modulus are expressions in terms of the crashworthiness.In the present study, a novel composite material is suggested, composed of a metastable austenitic stainless steel as matrix which shows the so-called transformation-induced plasticity (TRIP) effect. This TRIP effect yields high strain hardening and high ductility due to the deformation-induced formation of martensite. [8][9][10][11][12] As reinforcing phase, we suggest MgO partially stabilized zirconia (Mg-PSZ), which also shows a martensitic phase transformation from the tetragonal to the monoclinic crystal structure during deformation and/or temperature changes. [13][14][15] The transformation of Mg-PSZ provides a high shear and volume expansion, thus increasing the TRIP-effect of the steel.In terms of this work the ceramic extrusion technology, i.e., a plastic forming process at room temperature has been applied in order to produce cellular honeycomb structures based on MgO partially stabilized zirconia (Mg-PSZ) reinforced austenitic TRIP-steel matrix composites. [16,17] Compact COMMUNICATION Novel composites on basis of austenitic stainless TRIP-steel as matrix with reinforcements of Mg-PSZ are presented. Compact rods were produced by cold isostatic pressing and sintering, square honeycomb samples by the ceramic extrusion technique. The samples are characterized by optical and scanning electron microscopy before and after deformation, showing the microstructure and the deformationinduced martensite formation. The mechanical properties of samples with 5 vol% zirconia are superior compared to zirconia-free samples and composites with higher zirconia contents in terms of bending and compression tests. The honeycomb samples exhibit extraordin...

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Axial Impact Performances of Composite Aluminum Foam Tubes

Wang,

Xu,

Zhang

et al. 2024

Adv Eng Mater

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An improved melt foaming method is employed to fabricate composite aluminum foam tubes (CAFTs) with varying diameter ratios, achieving metallurgical bonding between the aluminum foam and aluminum tubes. Based on the structural characteristics of aluminum foam‐filled tubes and traditional numerical formula for calculating the energy absorption properties of metal foams, a new calculation formula is proposed to accurately evaluate energy absorption performance of CAFTs under axial load, enabling more precise numerical calculation of total energy absorption. Furthermore, drop weight impact tests and finite element simulations are conducted to investigate the axial impact performance and deformation mechanism of CAFTs. The influence of diameter ratio on crashworthiness and energy absorption performance is also analyzed. As the diameter ratios decrease, both the impact resistance and total energy absorption of CAFTs increase, while the degree of tube damage gradually decreases. Moreover, finite element simulation results demonstrate that metallurgical combination between aluminum foam and aluminum tubes effectively transfers stress to thin‐walled tubes with better load‐bearing performance, preventing concentrated collapse of aluminum foam core. Additionally, the presence of aluminum foam provides robust restraint against deformation or rupture in thin‐walled tubes.

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Optimum honeycomb filled crash absorber design

Cited by 141 publications

References 18 publications

Application of smart honeycomb structures for automotive passive safety

Application of smart honeycomb structures for automotive passive safety

Microstructure and Compression Strength of Novel TRIP‐Steel/Mg‐PSZ Composites

Axial Impact Performances of Composite Aluminum Foam Tubes

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