Stability Loss Analysis for Thin-Walled Shells with Elliptical Cross-Sectional Area

Kostka, J.; Bocko, Jozef; Frankovský, Peter; Delyová, Ingrid; Kula, Tomáš; Varga, Patrik

doi:10.3390/ma14195636

Materials

2021

DOI: 10.3390/ma14195636

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Stability Loss Analysis for Thin-Walled Shells with Elliptical Cross-Sectional Area

J. Kostka

Jozef Bocko

Peter Frankovský

et al.

Abstract: The aim of the scientific contribution is to point out the possibility of applicability of cylindrical shells with a constant elliptical cross-sectional shape for stability loss analysis. The solution to the problem consists of two approaches. The first approach is the experimental measurement of critical force levels, where the work also describes the method of production of the sample and jigs that cause the desired elliptical shape. The second approach is solving the problem in the use of numerical methods—… Show more

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References 35 publications

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Application of finite element method in industrial design, example of an electric motorcycle design project

Graba,

Grycz

2024

Open Engineering

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This study presents the use of finite element method (FEM) in solving the real engineering problems, e.g., an electric motorcycle design project. A simplified scheme of industrial design is presented, followed by an indication of how to use the capabilities of the selected CAD/CAM/ CAE software in the industrial design of industrial form. Using concurrent design based on the CAD system with the simultaneous use of CAE modules, the interdisciplinary of industrial design engineering was shown, which cannot exist without access to numerical methods. In the electric motorcycle project discussed in this article, the close relation between CAD and CAE modules was used, looking for the best solution in the construction of the motorcycle frame. By conducting a series of numerical simulations based on the FEM and topological optimization, the final shape of the frame and the rear control arm mounting was presented. The designed structure was optimized in terms of mass and effective stress distributions determined from the Huber-Mises-Hencky hypothesis. The resulting model of the frame was adapted to the design project, briefly discussed in the summary of the article. This study indicates the need to use the FEM and CAD/CAM/CAE applications at almost every stage of engineering design.

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Application of finite element method in industrial design, example of an electric motorcycle design project

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Grycz

2024

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Investigation of Functionality of Vehicle Crumple Zones Recovered after a Traffic Accident

et al. 2023

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It is fairly common for a used vehicle to have a history of damage related to traffic accidents. Post-accident repair of a vehicle is associated with both technical and economic challenges. Safe operation is mentioned primarily in the technical requirements that restrict further use of the vehicle. Here, forecasting the behaviour of the restored safety elements during another traffic accident should be addressed from the theoretical perspective. During a collision, the longitudinal members lose local stability due to the compressive impact load and partially absorb the impact energy due to the plastic deformations taking place during buckling. Recent research has placed a considerable focus on the analysis of this process, and guidelines have been developed for the design of these elements. However, the accumulated data on the effect of potential operational damages and the behaviour of the damaged elements during a traffic accident are insufficient. Moreover, no theoretical models have been developed, and the experimental investigations are insufficient. Investigating changes in the properties of elements of the crumple zone by using materials of different mechanical characteristics or changing the geometry is the essential part of this paper and forms the basis for the study of key deformation properties of the elements. This study designed numerical models allowing for forecasting of the longitudinal member and other structural elements of the vehicle in case of collision with an obstacle. The methodology was designed to forecast the amount of energy absorbed by the thin-walled sections used in the vehicle safety cage and the course of deformation under impact loads that caused stability loss. The effect of potential damages, such as geometric deviations and changes in the characteristics of materials and fabricated joints, was identified on the deformation of the restored safety elements.

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Stability Loss Analysis for Thin-Walled Shells with Elliptical Cross-Sectional Area

Cited by 2 publications

References 35 publications

Application of finite element method in industrial design, example of an electric motorcycle design project

Application of finite element method in industrial design, example of an electric motorcycle design project

Investigation of Functionality of Vehicle Crumple Zones Recovered after a Traffic Accident

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