Crashworthiness optimal design of a new extruded octagonal multi-cell tube under dynamic axial impact

Bai, Zhonghao; Sun, Kening; Zhu, Feng; Cao, Libo; Hu, Jun; Chou, Clifford C.; Jiang, Binhui

doi:10.1504/ijvs.2018.093056

Cited by 11 publications

(3 citation statements)

References 6 publications

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“…The von Mises yield criteria is used to define isotropic yielding. It is should be noted that the 6-series aluminum alloys generally show low strain-rate sensitivity, thus, the strain rate effect is not considered in the FE analysis, similar to literature [52,53].…”

Section: Finite Element (Fe) Models and Their Validationmentioning

confidence: 99%

Bending Response of Lattice Structure Filled Tubes under Transverse Loading

Cetin

Baykaşoğlu

2022

Hittite Journal of Science and Engineering

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Thin-walled tubes are widely used as passive energy-absorbing structures in a variety of industries. These structures are typically filled with lightweight materials to improve their energy absorption capabilities. At this point, additive manufacturing technology offers a great chance to researchers for the production of novel filler structures to increase the crashworthiness performance of thin-walled tubes. In the current work, additive manufacturable body-centered cubic (BCC) lattice structures are suggested as filling materials for tubes, and the bending response of these structures are investigated under transverse loads via finite element modeling approach. The aspect ratio and strut diameter are considered as design parameters, and three-point bending simulations are conducted to understand transverse load bearing behaviors of the structures. Different loading offsets are also taken into account for three-point bending simulations. The numerical results revealed that the BCC lattice structures used as filler materials significantly increase the energy absorption performance of thin-walled tubes due to synergetic interactions. In particular, the results showed that the hybrid tubes can absorb up to 84% more energy than the empty tubes, while the crush force efficiency of these structures is up to 42% higher compared to the empty tubes. The present study also showed that the transverse crushing characteristics of tubes can be considerably improved by suitable selection of the design parameters. These primary outcomes reveal that the proposed lattice structures can be considered as a potential alternative to traditional filler materials for enhancing the bending response of thin-walled tubes under transverse loading.

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Section: Finite Element (Fe) Models and Their Validationmentioning

confidence: 99%

Bending Response of Lattice Structure Filled Tubes under Transverse Loading

Cetin

Baykaşoğlu

2022

Hittite Journal of Science and Engineering

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“…Under the dynamic loading conditions, two vehicular components are studied, i.e. the thin-walled Sshaped beam (ShB) discussed in our previous studies [80,81] and thin-walled octagonal multi-cell tube (OMcT) reported in Bai et al [82]. Their geometry parameterization and FE models are illustrated in Figure 5.…”

Section: Structures Subject To Dynamic Loadingmentioning

confidence: 99%

Understanding the Effect of Hyperparameter Optimization on Machine Learning Models for Structure Design Problems

Zhu

2021

Computer-Aided Design

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“…The findings revealed that among the various section shapes examined, the circular tube stands out with the highest EA capacity and average force. Bai et al [10] presented a novel structural configuration for an octagonal energy absorber that incorporated an inner tube, an outer tube, and interconnected webs. Furthermore, in this study, a methodology is introduced utilising a multi-objective optimisation approach.…”

Section: Introductionmentioning

confidence: 99%

Quasi-static crashworthiness behaviour of auxetic tubular structures based on rotating deformation mechanism

Solak,

Orhan

2024

Smart Mater. Struct.

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Auxetic materials have attracted significant interest due to their exceptional mechanical characteristics and distinctive deformation modes. Nevertheless, the practical use of these materials in engineering is constrained by their limited ability to absorb energy. Thus, enhancing the energy absorption (EA) capabilities of auxetic materials is crucial to expand their range of potential applications. In this study, the EA capabilities of auxetic tubular structures with rotating deformation mechanisms are examined, with a specific emphasis on three different perforation shapes: elliptic, peanut, and square, along with their modified versions incorporating stiffeners. The study employs a combination of experimental testing and numerical modelling, utilising ANSYS/LS-DYNA to evaluate various crashworthiness parameters. These parameters include total EA, specific EA, maximum crushing force, and crushing force efficiency, all of which are assessed under quasi-static compression conditions. The research highlights the importance of perforation shape and stiffener incorporation in enhancing crashworthiness. Results show that elliptic perforations exhibit superior EA and stiffened auxetic models outperform conventional ones in terms of crash absorber performance. The presence of stiffeners significantly improves the ability of tubular structures to withstand crushing forces. Furthermore, the study validates the numerical model against experimental findings, demonstrating a high level of agreement in terms of crushing force–displacement, EA, and failure modes. The research provides valuable insights into the design and performance of crashworthy structures and offers potential applications in various fields where impact resistance and EA are critical.

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Crashworthiness optimal design of a new extruded octagonal multi-cell tube under dynamic axial impact

Cited by 11 publications

References 6 publications

Bending Response of Lattice Structure Filled Tubes under Transverse Loading

Bending Response of Lattice Structure Filled Tubes under Transverse Loading

Understanding the Effect of Hyperparameter Optimization on Machine Learning Models for Structure Design Problems

Quasi-static crashworthiness behaviour of auxetic tubular structures based on rotating deformation mechanism

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