Crushing analysis and multiobjective crashworthiness optimization of combined shrinking circular tubes under impact loading

Guan, Weiyuan; Gao, Guangjun; Yu, Yiqiang

doi:10.1007/s00158-021-02938-8

Cited by 18 publications

(5 citation statements)

References 35 publications

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“…In addition, SEA values for thin-walled CFRP tubes subjected to quasi-static loads often range between 50.4 kJ/kg and 86.3 kJ/kg [1,26,29,61], which are smaller than the values in this study. Guan et al [51] prepared circular metallic tubes (made of AISI 1020 steel) with similar geometrical dimensions to those of the CFRP tubes in this study. Axial crushing tests were performed at a velocity of 6.1 m/s.…”

Section: Resultsmentioning

confidence: 99%

“…A circular-shaped tube is a commonly used component in the crashworthiness design of railway vehicles, such as the energy-absorbing device [50,51,56]. As shown in Figure 1, the circular CFRP tubes were designed with an inner diameter (D) of 100 mm and a length (L) of 310 mm.…”

Section: Specimen Preparationmentioning

confidence: 99%

“…Guan et al [51] prepared circular metallic tubes (made of AISI 1020 steel) with similar geometrical dimensions to those of the CFRP tubes in this study. Axial crushing tests were performed at a velocity of 6.1 m/s.…”

Section: Model Setupmentioning

confidence: 99%

“…For example, railway vehicles have a larger mass than automobile equipment, which often leads to higher collision energies [48,49]. These energy-absorbing components are often required to carry a maximum average impact force of 500-2000 kN with wall thicknesses of 7-12 mm [50][51][52]. Conclusions from existing studies have shown that the failure mechanisms and mechanical performance of thick composite panels (with thicknesses larger than 6 mm) differ from those of thinner panels [53][54][55].…”

Section: Introductionmentioning

confidence: 99%

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On Crashworthiness and Energy-Absorbing Mechanisms of Thick CFRP Structures for Railway Vehicles

Chen

Sun

Li³

et al. 2022

Polymers

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This study aims to provide important guidelines for the crashworthiness design of composite energy-absorbing structures, especially railway vehicles. An experimental and numerical investigation was carried out to explore the crushing response of circular composite tubes reinforced with plain woven carbon fiber-reinforced polymers (CFRP). Quasi-static and dynamic axial crushing tests were performed on CFRP tubes with an inner diameter of 100 mm and a nominal wall thickness of 12 mm. Experimental results showed that increasing loading velocity led to a 21.8% reduction in specific energy absorption (from 99.7 kJ/kg to 78.7 kJ/kg) but had negligible influence on failure modes. Finite element models were also established and validated against the experimental results using ABAQUS/Explicit software. The effects of several different parameters such as the number of shell layers, friction coefficient, and interface properties on the simulated results, were also investigated and analyzed. A small variation in these parameters could change the total energy absorption of CFRP tubes. The comparisons between the predicted and experimental results indicated that a finite element model with 10 shell layers could effectively replicate the crushing response. In addition, the simulated results indicated that the damage of tubal wall materials dominated the major energy-absorbing mechanisms of CFRP tubes under quasi-static loads, which was 69.1% of the total energy. The energy dissipated by friction effects between the loading platen and the crushed fronds was 24.1% of the total energy. The increase in the loading velocity led to a decrease in the composite damage energy except for friction energy, resulting in a decrease in the total energy absorption.

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Section: Resultsmentioning

confidence: 99%

Section: Specimen Preparationmentioning

confidence: 99%

Section: Model Setupmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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On Crashworthiness and Energy-Absorbing Mechanisms of Thick CFRP Structures for Railway Vehicles

Chen

Sun

Li³

et al. 2022

Polymers

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“…Therefore, engineers often adopt conservative designs to ensure the performance of vehicles, which increases SM and cost. To meet the requirements of the impact safety and the lightweight of BEV, a variety of materials which are characterized with lightweight and high-strength have been studied, such as high-strength steel [27][28][29], aluminum alloy [30][31][32][33] and composite materials [34][35][36][37][38][39][40][41]. Among these materials, high-strength steel is the most widely used lightweight material in the automotive industry due to its advantages in price, performance and manufacturing [42].…”

Section: Introductionmentioning

confidence: 99%

Multi-objective optimization design of B-pillar and rocker sub-systems of battery electric vehicle

Chen

et al. 2021

Struct Multidisc Optim

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B-pillar and rocker are the key force transmission sub-systems of the side impact of Battery Electric Vehicle (BEV), and scholars have studied the side crashworthiness of these sub-systems and vehicle body a lot. However, these works are insufficient on the analysis of benchmarking vehicle models, the simulation and experiment of the B-pillar and rocker sub-systems, and the optimization of these sub-systems. To make up these shortcomings, this work aims to design the B-pillar and the rocker, and improve the side crashworthiness of BEV. It presents a systematic method on the side crashworthiness of BEV. The dynamic bending performance of the B-pillar and the rocker are studied in simulation analyses and experiments. The materials, structures and crashworthiness of these two sub-systems of eleven benchmark models are studied. Minimizing structural mass (SM) and Cost as well as maximizing mean crushing force (MCF) are performed based on multi-objective artificial tree (MOAT) algorithm to optimize the B-pillar and the rocker. The optimized sub-systems are applied to the body of a BEV. As a result, the performance of the B-pillar and the rocker is significantly improved, and their optimal solution templates are provided. The performance of the BEV is also improved under the Advanced European Mobile Deformable Barrier (AEMDB) side impact and the oblique pole side impact. Some interesting conclusions for BEV are presented. In summary, this work has obvious reference value for automotive engineers and scholars to further study the crashworthiness and lightweight of BEV.

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Energy absorption design for crash energy management passenger trains based on scaled model

Wang

et al. 2021

Struct Multidisc Optim

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Crushing analysis and multiobjective crashworthiness optimization of combined shrinking circular tubes under impact loading

Cited by 18 publications

References 35 publications

On Crashworthiness and Energy-Absorbing Mechanisms of Thick CFRP Structures for Railway Vehicles

On Crashworthiness and Energy-Absorbing Mechanisms of Thick CFRP Structures for Railway Vehicles

Multi-objective optimization design of B-pillar and rocker sub-systems of battery electric vehicle

Energy absorption design for crash energy management passenger trains based on scaled model

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