Crashworthiness multi-objective optimization of the thin-walled tubes under probabilistic 3D oblique load

Rad, Mohammad Arjomandi; Khalkhali, Abolfazl

doi:10.1016/j.matdes.2018.07.008

Cited by 31 publications

(2 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this study, the critical force ICF and specific energy absorption SEA are used as optimization indicators for the collision resistance performance of multicellular tubes [ 37 ]. From the non-dominated sorting genetic algorithm (NSGAII), a set of Pareto solutions with high accuracy can be obtained through non-dominated sorting while maintaining population diversity, which is suitable for nonlinear optimization of SEA and critical forces [ 38 , 39 ]. Given its superiority, NSGAII was selected in this study for multi-objective optimization, so as to determine the objective functions and constraints, which can be detailed as follows:

…”

Section: Discussionmentioning

confidence: 99%

Axial Crushing Theory and Optimization of Lattice-Filled Multicellular Square Tubes

Zhou,

Liu,

Rong

et al. 2024

Materials

View full text Add to dashboard Cite

A lattice-filled multicellular square tube features a regular cross-sectional shape, good energy consumption, and good crashworthiness, which is suitable for the design of energy absorbers in various protection fields such as automobiles, aerospace, bridges, etc. Based on the super folding theory, two reference planes are set to refine the energy consumption zone of the super folding element in this study. The energy consumption calculation of convex panel stretching is involved, and the critical crushing force formula is introduced in this study. Meanwhile, the calculation method from a single-cell square tube to a multicellular thin-walled square tube is extended and the structural optimization is investigated, in which the NSGAII algorithm is used to obtain the Pareto front (PF) of the crashworthiness performance index of the square multicellular tubes, the Normal Boundary Intersection (NBI) method is adopted to select knee points, and the influence of different cross-sectional widths on the number, as well as the thickness, of cells are discussed. This study’s results indicate that the theoretical value is consistent with that obtained from the numerical simulation, meaning that the improved theoretical model can be applied to predict the crashworthiness of multicellular square cross-sectional tubes. Also, the optimization method and study results proposed in this study can provide a reference for the design of square lattice multicellular tubes.

show abstract

…”

Section: Discussionmentioning

confidence: 99%

Axial Crushing Theory and Optimization of Lattice-Filled Multicellular Square Tubes

Zhou,

Liu,

Rong

et al. 2024

Materials

View full text Add to dashboard Cite

show abstract

“…Because artificial control was difficult to guarantee randomness, the validation sampling points were also obtained using a DOE method. Here, the LHD method, which is also used widely in structure optimization, 39 was adopted. Totally 25 validation sampling points were produced and are shown in Figure 12 .…”

Section: Approximate Model and Factorial Analysismentioning

confidence: 99%

Crashworthiness analysis of a multi-layered bi-directionally corrugated steel plates structure

Che

et al. 2020

Science Progress

View full text Add to dashboard Cite

This paper proposed a multi-layered bi-directionally corrugated plates structure (BCPS) for energy absorption. Quasi-static compression experiments and finite element method (FEM) were used to investigate the crushing performance of the multi-layered BCPS. The results showed that the multi-layered BCPS had very small initial peak crushing force, and the fluctuation of force was very small during the whole compression process. These characteristics made the multi-layered BCPS more advantageous in crashworthiness than traditional structures. It was also found that the crushing performance of the multi-layered BCPS was very sensitive to the geometrical parameters, such as the number of the cellular structures along the width nc, the number of plates nl, and the ratio of width of small square ws to width of big square wb of the pyramid cell η. Therefore, parameters optimization was carried out using the Multi-Objective Genetic Algorithm to find the best geometrical configuration of the structure. After optimization, the optimum parameters nc = 5, nl = 11 and η = 0.38 was obtained. The specific energy absorption increased by 143.76% compared with the initial configuration.

show abstract

Aheat‐press‐treatmentmethod for3Dprintedthin‐walledcomposite structures with improved interfacial and compressive properties

et al. 2022

View full text Add to dashboard Cite

3D printed thin-walled composite structures suffered from the inherent low interlayer bonding, which limited the mechanical properties and influenced compressive behaviors. This work focused on effects of the postprocess on interfacial properties and compressive behaviors of thin-walled composite structures made by fused deposition modeling. To improve the interfacial properties, a heat-press-treatment method was proposed. Compared to the nontreated thin-walled structures, the energy absorption (EA) of the heatpress-treated structures increased from 61 to 90 J. It was found that both heat and pressure were indispensable conditions. The heat-press-treated thinwalled structures presented a stable progressive collapse mode, while the heattreated structures without pressure collapsed in an unstable buckling manner due to the brittle fractures. The heat-press-treated structures presented higher crushing force efficiency (CFE) and EA than the heat-treated structures. The difference was more significant with the increase of the treatment temperature from 50 to 200 C. Finally, the mechanisms of the improvement by the heatpress-treatment on interfacial bonding were analyzed. The findings of this research offered new insights on improving the EA for 3D printed thin-walled composite structures.

show abstract

Crashworthiness multi-objective optimization of the thin-walled tubes under probabilistic 3D oblique load

Cited by 31 publications

References 43 publications

Axial Crushing Theory and Optimization of Lattice-Filled Multicellular Square Tubes

Axial Crushing Theory and Optimization of Lattice-Filled Multicellular Square Tubes

Crashworthiness analysis of a multi-layered bi-directionally corrugated steel plates structure

Aheat‐press‐treatmentmethod for3Dprintedthin‐walledcomposite structures with improved interfacial and compressive properties

Contact Info

Product

Resources

About