Crashworthiness analysis and design of a sandwich composite electric bus structure under full frontal impact

Jongpradist, Pattaramon; Saingam, N.; Tangthamsathit, Ploypimol; Chanpaibool, P.; Sirichantra, Jariyavadee; Aimmanee, Sontipee

doi:10.1016/j.heliyon.2022.e11999

Cited by 13 publications

(7 citation statements)

References 14 publications

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“…Numerous studies in the literature have been conducted with the aim of mitigating the problem by identifying low resistance zones and optimizing geometry (Youming, Yongpan, and Hongwu 2013;Morocho et al 2022). For example, Jongpradist et al (Jongpradist P. 2015) presented optimized models that adhere to the ECE R-29 standard, highlighting the importance of incorporating crushing zones in vehicles to effectively manage energy absorption. Other researchers, such as Rooppakhun and Bua-Ngam (2013) and Cerit (2010), have proposed the use of attenuators for controlling variable geometry.…”

Section: Concise Literaturementioning

confidence: 99%

“…The UNECE (Commission for the Union of European Economies) has prioritized this issue with the goal of reducing road related mortality by 50% by 2020 through bodywork improvements and technological solutions, to minimize fatalities (UNECE 2015). Matolcsy (2016) categorized bus accidents as frontal collisions or combined impacts, with frontal collisions being the most common cause (Jongpradist P. 2015). The high number of individuals involved in bus accidents, with potential to injure up to 50 people per incident, is a significant concern (Matolcsy 2016).…”

Section: Concise Literaturementioning

confidence: 99%

“…The status of vehicle deformation directly affects driver safety, with structural incursion into the passenger compartment and decelerations being crucial criteria (Matsumoto 2012). Therefore, it is imperative to incorporate in bus design, innovative technologies that can absorb the crash energy in a controlled manner (Jongpradist P. 2015;Abramowicz 2003). Currently, buses lack the structural capacity to fully absorb the impact energy, resulting in significant intrusion into the driver's cabin (Jongpradist P. 2015).…”

Section: Concise Literaturementioning

confidence: 99%

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Lean Design-for-X Framework applied in the Crashworthiness and Environmental Design Assessment of a redesigned Passenger Coach

Lopes,

Pinto,

Parente

et al. 2023

Preprint

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A comprehensive crashworthiness analysis in the design of coaches, specifically focusing on adapting the ECE R29 standard, was made. The external fiberglass composite panels of two coach models were tested for replacement with a state-of-the-art polymer (DCPD). The analysis was based on the finite element method, using the software Pamcrash®, which evaluates the energy absorption capacity of the models, comparing deformation, displacements, and material penetration values over time. The assessment of the driver's residual space, as specified by the ECE R29 standard, is also included in the analysis. The Lean Design for eXcellence (LeanDfX) methodology was used, which involves multiple domains of analysis including model optimization, manufacturing process, and eco-design. It employs an index on a 0%-100% scale, to compare different 'X' domains, such as energy absorption capacity and material intrusion. An Eco-Design X study is also conducted to assess the environmental impacts of the proposed solution compared to the original models. Quantification is carried out using the Simapro v9.2.0.2 software with the ReCiPe 2016 methodology. The modifications proposed to the coach models are shown to result in significant improvement in the structural behaviour of the vehicle for driver's physical integrity in frontal impact scenarios. The cross results of Design-for-Crashworthiness and Design-for-Eco-Design using the LeanDfX framework provide a new perspective to be integrated in the automotive industry. The use of a state-of-the-art polymer (DCPD) for the external panels, is expected to lead to a more crashworthy and environmentally friendly design for coaches, while ensuring passenger safety.

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Section: Concise Literaturementioning

confidence: 99%

Section: Concise Literaturementioning

confidence: 99%

Section: Concise Literaturementioning

confidence: 99%

See 1 more Smart Citation

Lean Design-for-X Framework applied in the Crashworthiness and Environmental Design Assessment of a redesigned Passenger Coach

Lopes,

Pinto,

Parente

et al. 2023

Preprint

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“…The conditions of the drop weight impact test are set according to the ASTM-D7136 standard (Akangah & Shivakumar, 2013), as shown in Figure 1. Simulation results are obtained by using the Radioss solver and validated with the experiment (Jongpradist et al, 2022). The FE model in Figure 1 consists of a composite plate and an impactor.…”

Section: Validation Of the Composite Materials Modelmentioning

confidence: 99%

“…The stacking sequence is [G(0°/90°) 6 /(±45°) 8 ], and the ply thickness for each layer is 0.4 mm. The material properties of G400 are listed in Table 1 (Jongpradist et al, 2022), and the Tsai-Wu criteria (Groenwold & Haftka, 2006) available for MAT25 (COMPSH) in Radioss is used to investigate the characteristics of material plasticity. The impactor is in a spherical shape of 16-mm diameter created by using solid elements with a mass of 9.6 kg and is assigned as a rigid body.…”

Section: Validation Of the Composite Materials Modelmentioning

confidence: 99%

Optimizing stiffness and lightweight design of composite monocoque sandwich structure for electric heavy quadricycle

Homsnit,

Kongwat,

Ruangjirakit

et al. 2023

Lat. Am. j. solids struct.

Self Cite

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The lightweight design of electric heavy quadricycle (L7e) vehicles has contributed to energy savings and sustainable mobility. This study proposes an optimization methodology to design a monocoque sandwich structure under operating conditions for an L7e using a finite element model via HyperWorks. Woven fiberglass fabrics and high-density PVC foam are assigned as the face and core to construct the sandwich structure, respectively. Free-size optimization based on weight minimization is applied to obtain the suitable initial thickness of face and core structures in all components. Multi-objective size optimization is then performed by minimizing both mass and material cost to determine the optimal thickness of each layer. Finally, shuffle optimization is used to modify the stacking sequence for each component to maximize structural stiffness. The results indicate that the core thickness in the passenger compartment is sufficient to maintain stiffness while maintaining the structure's lightweight. However, shuffle optimization is insignificant for the current monocoque model, as the structural stiffness is only marginally improved after the process. Additionally, this study examines the optimized models for structural stiffness and discusses suitable procedures for designing a lightweight and safe electric vehicle.

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Energy attenuation capability of woven natural silk/epoxy laminates subjected to drop weight impacts

Azhari,

Ude

2024

Polymer Composites Derived From Animal Sources

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Crashworthiness analysis and design of a sandwich composite electric bus structure under full frontal impact

Cited by 13 publications

References 14 publications

Lean Design-for-X Framework applied in the Crashworthiness and Environmental Design Assessment of a redesigned Passenger Coach

Lean Design-for-X Framework applied in the Crashworthiness and Environmental Design Assessment of a redesigned Passenger Coach

Optimizing stiffness and lightweight design of composite monocoque sandwich structure for electric heavy quadricycle

Energy attenuation capability of woven natural silk/epoxy laminates subjected to drop weight impacts

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