Energy absorption capability of origami automobile bumper system

Yuan, Lin; Zhang, You

doi:10.1177/0954406219862307

Cited by 5 publications

(2 citation statements)

References 34 publications

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“…In decades, many remarkable geometric and mechanical characteristics of origami-inspired deployable structures have been explored and innovated by engineers. [1][2][3][4][5] The origami patterns of miura-ori, 6,7 squaretwist, 8,9 diamond, 10 and waterbomb 11 are most practically used in various origami fields. Meanwhile, many origami-inspired mechanisms have been widely used in engineering applications varying from large space deployable structures (such as membrane antennas, solar sails, and solar arrays), 12 to microscopic DNA nanotechnology, as well as some biomedical structures and civil engineering structures.…”

Section: Introductionmentioning

confidence: 99%

Configuration design and crease topology of origami-inspired spinning space deployable structures

Tang,

Liu,

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part C:

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Origami-inspired space deployable structures can be transformed from the folded states into the deployed states in orbit, which satisfied the demands of complex space missions and had been widely used in the space field. It remains to be investigated how the space deployable structures realized a large deployable ratio in the crease design process of origami patterns for the storage space limitation of spacecraft structures. Origami-inspired Regular Polygons Deployable Structures (RPDS) were proposed by designing the origami configurations and analyzing the deployable mechanism from existing space deployable structures, and a novel crease topology with three different approaches was presented in repeating origami modules to enhance the deployable ratio. The topology results indicated that the deployable ratio of RPDS can be increased effectively by shortening the storage height or performing multi-stage deployment, and the flexibility of RPDS can be verified by changing the shape of the central body. The configuration rationality and deployable reliability of RPDS are confirmed by kinematic modeling and numerical simulation. This study provides new insights into extraordinary geometrical and folding properties of origami-inspired deployable structures via configuration design and crease topology, which can be extended to other origami patterns in various origami-inspired applications.

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Section: Introductionmentioning

confidence: 99%

Configuration design and crease topology of origami-inspired spinning space deployable structures

Tang,

Liu,

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Análogà as dobraduras em papel, essa configuração possui irregularidades geométricas intencionais, ilustradas na Figura 9, que influenciam no modo de falha do componente. Esse tipo de estrutura permitiu ganhos na absorção de energia específica e redução na força de reação máxima [30,31]. Ma [32]).…”

Section: Absorção De Energiaunclassified

Metodologia de análise e otimização de absorvedores de energia em automóveis.

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The development of automobiles in the present day takes different factors into consideration, such as performance, economic viability, safety standards and emissions. However, certain desired objectives often compete with each other. Improving the crashworthiness of a car can negatively affect its cost and handling. The use of optimization techniques is a good alternative when improving one metric without deteriorating other results linked to it. This work aims specifically at parametrically optimizing the midrail of light vehicles, which is a structural part responsible for mitigating occupant injuries during traffic collisions. The experiments are conducted exclusively by the finite element method, known for its flexibility and precision for this kind of phenomenon, and it's often employed during the initial stages of a project development. In spite of the component's simple geometry, the non-linear nature of the experiments, associated with the number of iterations required for optimization, greatly increases the computational cost for solving the problem. In order to reduce the time of the optimization process, there was studied the use of three different optimization algorithms. In parallel, there was analyzed the feasibility of the use of regression models called metamodels, whose main role is to reduce the overall number of experiments. The use of design of experiments was also explored. It is responsible both for feeding data into the metamodels, and for proposing initial projects for the optimizations. All optimizations were able to offer midrails with greater energy absorption per unit of volume, within a maximum reaction force constraint. However, none of them guaranteed that the midrail had the maximum possible performance within the analyzed domain. Despite limitations regarding the response surfaces' adhesion to certain physical phenomena, the combination of metamodels with optimization algorithms reduced the computational time by up to 75%, while generating midrails with more desirable characteristics, when compared to the results of optimizations without metamodels.

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Comparing non-biodegradable plastic with environmentally friendly natural fibre composite on car front bumpers design

Sidde,

Cheung,

Leung

2023

Clean Techn Environ Policy

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Production of plastic is growing, and plastics are used in a variety of products. However, plastics are not biodegradable and do not decompose easily. To overcome the problems in decomposition of plastics, the use of a specific type of natural fibre composite (NFC) material for front-bumper in cars is considered in this investigation. NFCs have the advantages of being environmentally friendly, light weight and high strength. The use of jute fibre is adopted for the design of a car front bumper and compared with the plastic bumper through Finite Element Analysis. The aim is to identify their performances in terms of impact energy, strength and resilience. The results show that when both materials were simulated under the same impact force, jute fibre has a lower equivalent stress with 177.1 MPa compare with 293.18 MPa on plastic material. This finding indicates that jute fibre has greater yield limit and more resilient to fracture. The simulation result also shows that jute fibre has a higher equivalent stress of 65.55 MPa on the front bumper compare with a lower equivalent stress of 39.94 MPa on plastic. This suggests that plastic material will yield soon when an impact force is higher. The total deformation after the same impact force in jute fibre is 2.1 mm, which is significantly less than the deformation in plastic with 11.7 mm. Therefore, this research concludes that jute fibre can potentially replace plastic as a green composite material application to minimise environmental damages. Graphical abstract

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Energy absorption capability of origami automobile bumper system

Cited by 5 publications

References 34 publications

Configuration design and crease topology of origami-inspired spinning space deployable structures

Configuration design and crease topology of origami-inspired spinning space deployable structures

Metodologia de análise e otimização de absorvedores de energia em automóveis.

Comparing non-biodegradable plastic with environmentally friendly natural fibre composite on car front bumpers design

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