On design of multi-cell thin-wall structures for crashworthiness

Wu, Shunchuan; Zheng, Gang; Sun, Guangyong; Liu, Qiang; Li, Guangyao; Li, Qing

doi:10.1016/j.ijimpeng.2015.09.003

Cited by 209 publications

(38 citation statements)

References 35 publications

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“… For high strain rate, significant enhancement of the plateau stress was reported due to shockwave effects. [172] Alporas, a closed-cell aluminium foam 400 to 2500 s −1  Strain rate sensitivity was reported  The strain rate sensitivity increased with increasing the foam density [280] ALPORAS functionally graded aluminium foam 1000-2000 s −1  ALPORAS foam exhibited strain rate sensitivity in the range up to 1000 [S −1 ]  For higher strain rate rates (≈ 2000 s -1 ), the foam showed insensitive behaviour to strain rate [281] [283], [185], [120], [246]    [100]    [243]    [245]    [246]    [246]    [246], [284]    [284]    [284]    [285]    [286]    [287]    [121] Indentations   [288]    [47]    [289]    [46]    [290], [230]    [242] Stiffeners   [238] Corrugations   [291]    [292] Indentations   [293] Cut-outs   [113]    [294], [185], [245], [120], [221], [295], [104]    [220], [221]    ...…”

Section: Referencesmentioning

confidence: 99%

On the crashworthiness performance of thin-walled energy absorbers: Recent advances and future developments

Baroutaji

Sajjia

Olabi

2017

Thin-Walled Structures

524

135

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Over the past several decades, a noticeable amount of research efforts has been directed to minimising injuries and death to people inside a structure that is subjected to an impact loading.\ud \ud Thin-walled (TW) tubular components have been widely employed in energy absorbing structures to alleviate the detrimental effects of an impact loading during a collision event and thus enhance the crashworthiness performance of a structure.\ud \ud Comprehensive knowledge of the material properties and the structural behaviour of various TW components under various loading conditions is essential for designing an effective energy absorbing system.\ud \ud In this paper, based on a broad survey of the literature, a comprehensive overview of the recent developments in the area of crashworthiness performance of TW tubes is given with a special focus on the topics that emerged in the last ten years such as crashworthiness optimisation design and energy absorbing responses of unconventional TW components including multi-cells tubes, functionally graded thickness tubes and functionally graded foam filled tubes.\ud \ud Due to the huge number of studies that analysed and assessed the energy absorption behaviour of various TW components, this paper presents only a review of the crashworthiness behaviour of the components that can be used in vehicles structures including hollow and foam-filled TW tubes under lateral, axial, oblique and bending loading

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Section: Referencesmentioning

confidence: 99%

On the crashworthiness performance of thin-walled energy absorbers: Recent advances and future developments

Baroutaji

Sajjia

Olabi

2017

Thin-Walled Structures

524

135

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“…For each kind of sample, the experiments are repeated three times. Specific energy absorption (SEA) [ 47 , 48 , 49 , 50 , 51 ] is used to evaluate the energy absorption capacity of the samples, which is expressed as

where EA is the energy absorption, L is the effective total crushing length (that is to say, the crushing length of the regime of densification, in which the crushing force rises steeply, is not included) [ 45 ], and F is the crushing force and m is the mass of the structure.…”

Section: Effect Of Geometrical Morphology On Energy Absorption Promentioning

confidence: 99%

Mechanical Metamaterials Foams with Tunable Negative Poisson’s Ratio for Enhanced Energy Absorption and Damage Resistance

et al. 2018

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Systematic and deep understanding of mechanical properties of the negative Poisson’s ratio convex-concave foams plays a very important role for their practical engineering applications. However, in the open literature, only a negative Poisson’s ratio effect of the metamaterials convex-concave foams is simply mentioned. In this paper, through the experimental and finite element methods, effects of geometrical morphology on elastic moduli, energy absorption, and damage properties of the convex-concave foams are systematically studied. Results show that negative Poisson’s ratio, energy absorption, and damage properties of the convex-concave foams could be tuned simultaneously through adjusting the chord height to span ratio of the sine-shaped cell edges. By the rational design of the negative Poisson’s ratio, when compared to the conventional open-cell foams of equal mass, convex-concave foams could have the combined advantages of relative high stiffness and strength, enhanced energy absorption and damage resistance. The research of this paper provides theoretical foundations for optimization design of the mechanical properties of the convex-concave foams and thus could facilitate their practical applications in the engineering fields.

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“…Design optimization is an excellent method to consider the appropriate structural parameters to improve the performance . [ 33–36 ] Many researchers have done the crushing analysis and crashworthiness optimization on the foam‐filled [ 37–43 ] and multicell [ 44–50 ] thin‐walled structures under multiple loading cases. Of course, the researchers carried out a series of studies on the optimization of CFRP/metal hybrid structures.…”

Section: Introductionmentioning

confidence: 99%

Structure design and multiobjective optimization of CFRP/aluminum hybrid crash box

Zha

Dong

et al. 2020

Polymer Composites

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To improve the crashworthiness and reduce vehicle weight, a crash box made of carbon fiber reinforced plastics (CFRP)/aluminum (Al) hybrid materials was introduced in the paper. Quasistatic axial compression tests and numerical simulations were conducted for pure Al tubes and CFRP/Al hybrid tubes. The simulation models were validated and were further employed to investigate the effects of geometry, aluminum tube thickness, fiber wrapping angle and CFRP layers on the crashworthiness of the hybrid crash box under axial loading and 30 oblique collision. The multiobjectives were taken to obtain the optimal geometrical dimensions, aluminum tube thickness, wrapping angle, and the number of layers. The crashworthiness of the optimal CFRP/Al hybrid crash box was compared with that of original aluminum crash box. It was found that the mass of the crash box was reduced by 35.21%, while the specific energy absorption (SEA) and mean crushing force (F mean) were increased by more than 18% and 46%, respectively. The paper was aimed to provide some references for the design and optimization of composite crash box.

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On design of multi-cell thin-wall structures for crashworthiness

Cited by 209 publications

References 35 publications

On the crashworthiness performance of thin-walled energy absorbers: Recent advances and future developments

On the crashworthiness performance of thin-walled energy absorbers: Recent advances and future developments

Mechanical Metamaterials Foams with Tunable Negative Poisson’s Ratio for Enhanced Energy Absorption and Damage Resistance

Structure design and multiobjective optimization of CFRP/aluminum hybrid crash box

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