Design and Modelling Methodologies of an Efficient and Lightweight Carbon-fiber Reinforced Epoxy Monocoque Chassis, Suitable for an Electric Car

Tsirogiannis, Ch Evangelos

doi:10.24218/msear.2017.21

Cited by 16 publications

(9 citation statements)

References 6 publications

(7 reference statements)

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“…The worst case stress scenario which is used in the current work has been thoroughly described in our previous paper [8]. In this scenario, the vehicle is turning in the first corner and the wheel is positioned in the apex at 30 km/h, it encounters a stationary preceding vehicle and decelerates immediately (6 m/s 2 ), to avoid the accident [22][23][24][25][26][27][28].…”

Section: Worst Case Stress Scenariomentioning

confidence: 99%

“…The chassis load calculator (CLC) model has been presented analytically in our previous paper [8] and it is used in the current work in order to calculate automatically the magnitude and the direction of the loads acting on the car, by importing its characteristics. The model has been implemented by the use of vehicle dynamics theory [22,[29][30][31][32][33] and the model's output is presented in Tables 5-7.…”

Section: Chassis Load Calculator Modelmentioning

confidence: 99%

“…The present publication has been revealed through the development of previous works. The design and manufacturing of the aforementioned space frame chassis was presented in [6] as well as both modeling and simulation steps in [7,8].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Electric Car Chassis for Shell Eco Marathon Competition: Design, Modelling and Finite Element Analysis

Tsirogiannis

Stavroulakis

Makridis

2019

WEVJ

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The increasing demand for energy efficient electric cars, in the automotive sector, entails the need for improvement of their structures, especially the chassis, because of its multifaceted role on the vehicle dynamic behaviour. The major criteria for the development of electric car chassis are the stiffness and strength enhancement subject to mass reduction as well as cost and time elimination. Towards this direction, this work indicates an integrated methodology of developing an electric car chassis considering the modeling and simulation concurrently. The chassis has been designed in compliance with the regulations of Shell Eco Marathon competition. This methodology is implemented both by the use of our chassis load calculator (CLC) model, which automatically calculates the total loads applied on the vehicle’s chassis and by the determination of a worst case stress scenario. Under this extreme stress scenario, the model’s output was evaluated for the chassis design and the FEA method was performed by the pre-processor ANSA and the solver Ansys. This method could be characterized as an accurate ultrafast and cost-efficient method.

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Section: Worst Case Stress Scenariomentioning

confidence: 99%

Section: Chassis Load Calculator Modelmentioning

confidence: 99%

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Electric Car Chassis for Shell Eco Marathon Competition: Design, Modelling and Finite Element Analysis

Tsirogiannis

Stavroulakis

Makridis

2019

WEVJ

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“…The main goal is the design and production of a lightweight structure suitable for the fuel cell powered car, in a low production cost. The current work has been revealed through the development of previous works [2,3]. It is worth noting that the chassis is particular designed for the needs of the Shell Eco Marathon racing competition [4].…”

Section: Introductionmentioning

confidence: 99%

“…The fuel cell uses a hydrogen 200 bar bottle as a fuel tank. The achieved autonomy is around 70 km/kwh and the CO 2 emissions are 0 g. These specifications are adopted by [2,3,7].…”

Section: Introductionmentioning

confidence: 99%

Lightweight Design and Welding Manufacturing of a Hydrogen Fuel Cell Powered Car’s Chassis

et al. 2018

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The development of the chassis for the hydrogen fuel cell powered car has been involved in the designing and manufacturing aspects, while taking into consideration the mass, strength, stiffness, centre of gravity (COG), and manufacturing cost requirements. Towards this direction, a chassis design is proposed employing a space frame structure and constructed by an aluminium alloy with great strength. The structural design has been derived through the lightweight engineering approaches in conjunction with the part consolidation, Design for Assembly (DFA) and Design for Manufacture methods. Moreover, it has been performed in compliance with the safety regulations of the Shell Eco Marathon racing competition. The material's principal characteristics are the great strength, the low mass, as well as the great workability, machinability, and weldability. Following the national and global environmental issues, the recyclable characteristics of the aluminium alloy are an extra asset. Furthermore, the existence of aluminium alloy manufacturers around the fabricating area provides low cost supply and fast delivery benefits. The integration of the fuel cell powered vehicle is obtained through the designing and the manufacturing processes of the chassis and the parts fitted on the chassis. The manufacturing procedures are described thoroughly; mainly consisting of the cutting and welding processes and the assembling of the parts that are fitted on the chassis. Additionally, the proper welding parameters for the custom chassis design are investigated and are selected after deductive reasoning. The quality control of the weld joints is conducted by non-destructive methods (NDT) ensuring the required structural properties of the welds. A combination of the selected material, the specific type of the chassis, and the manufacturing processes lead to construction simplicity in a low manufacturing cost by using the existing laboratory equipment. Furthermore, the designing and manufacturing parameters lead to a stiff with a low centre of gravity, and the most lightweight chassis of the urban concept category at the Shell Eco Marathon race.

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Nanobainite formation in high-Al medium-Mn steels: thermodynamic approach

Morawiec,

Opara,

Grajcar

2024

J Therm Anal Calorim

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The objective of this study was to analyze the thermodynamic feasibility of forming nanobainite in Al-alloyed medium-Mn steels through intercritical annealing (IA) and subsequent heat treatments. The research aimed to determine the influence of IA temperature and Mn content on the stability of austenite, the Ms temperature, and the resulting bainite plate thickness (BPT). Our findings indicate that the IA temperature range of 780–860 °C effectively decreased the Ms temperature, facilitating the formation of nanobainite. The results demonstrated that a higher Mn content increases an austenite fraction during IA, thus enhancing the potential for nanobainite formation. For the 3MnNb steel, the IA temperature of 860°C was sufficient to achieve bainitic plates thinner than 100 nm, whereas the 4MnNb steel required lower IA temperatures due to its higher Mn content. The transformation kinetics was found to be faster in 3MnNb steel, with a complete transformation time of 300 min, compared to approximately 600 min for the 4MnNb steel. Dilatometric analysis confirmed that the real austenite fractions were approximately 20% higher than the ones predicted by thermodynamic simulations, indicating potential limitations of the commercial software in accurate predicting the experimental conditions. The obtained results validate the proposed heat treatment strategy for achieving nanobainitic structures in medium-Mn steels.

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Design and Modelling Methodologies of an Efficient and Lightweight Carbon-fiber Reinforced Epoxy Monocoque Chassis, Suitable for an Electric Car

Cited by 16 publications

References 6 publications

Electric Car Chassis for Shell Eco Marathon Competition: Design, Modelling and Finite Element Analysis

Electric Car Chassis for Shell Eco Marathon Competition: Design, Modelling and Finite Element Analysis

Lightweight Design and Welding Manufacturing of a Hydrogen Fuel Cell Powered Car’s Chassis

Nanobainite formation in high-Al medium-Mn steels: thermodynamic approach

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