Structural Performance of Thin-Walled Twisted Box-Section Structure

Wang, Shijun; Zan, Wang; Chang, Ping; Wang, Xing; Wu, Huiying; Feng, Jian; Cai, Jianguo

doi:10.3390/buildings12010012

Cited by 3 publications

(1 citation statement)

References 28 publications

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“…Using FEM and creating a full 3D model for very complex structures would not only be laborious but also very time-consuming in terms of modeling time and computational cost [ 13 ]. In such cases, the complex structures are often modeled with a mesoscale approach, in which some parts of the structure are simplified to reduce the cost of the computations without losing the required accuracy [ 14 , 15 ]. Simplification may be obtained through adopting the numerical homogenization technique, which will be able to represent the behavior of the substructure with sufficient accuracy.…”

Section: Introductionmentioning

confidence: 99%

Effective Stiffness of Thin-Walled Beams with Local Imperfections

2022

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Thin-walled beams are increasingly used in light engineering structures. They are economical, easy to manufacture and to install, and their load capacity-to-weight ratio is very favorable. However, their walls are prone to local buckling, which leads to a reduction of compressive, as well as flexural and torsional, stiffness. Such imperfections can be included in such components in various ways, e.g., by reducing the cross-sectional area. This article presents a method based on the numerical homogenization of a thin-walled beam model that includes geometric imperfections. The homogenization procedure uses a numerical 3D model of a selected piece of a thin-walled beam section, the so-called representative volume element (RVE). Although the model is based on the finite element method (FEM), no formal analysis is performed. The FE model is only used to build the full stiffness matrix of the model with geometric imperfections. The stiffness matrix is then condensed to the outer nodes of the RVE, and the effective stiffness of the cross-section is calculated by using the principle of the elastic equilibrium of the strain energy. It is clear from the conducted analyses that the introduced imperfections cause the decreases in the calculated stiffnesses in comparison to the model without imperfections.

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Section: Introductionmentioning

confidence: 99%

Effective Stiffness of Thin-Walled Beams with Local Imperfections

2022

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Propagation characteristics of circumferential feature guided waves propagation in a revolved topological waveguide

Yuan,

Li,

Deng

2024

Wave Motion

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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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Structural Performance of Thin-Walled Twisted Box-Section Structure

Cited by 3 publications

References 28 publications

Effective Stiffness of Thin-Walled Beams with Local Imperfections

Effective Stiffness of Thin-Walled Beams with Local Imperfections

Propagation characteristics of circumferential feature guided waves propagation in a revolved topological waveguide

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

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