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模块化填充双帽梁复合结构的轴向压缩与能量吸收一体化设计

Axial Crushing and Energy Absorption Integrated Design of Modular Filled Double-Hat Beam Composite Structures.

作者信息

Yi Xiaojian, Hu Lin, Li Qiqi, Tang Yong

机构信息

School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China.

Hunan Province Key Laboratory of Safety Design and Reliability Technology for Engineering Vehicle, Changsha University of Science and Technology, Changsha 410114, China.

出版信息

Materials (Basel). 2024 Aug 30;17(17):4302. doi: 10.3390/ma17174302.

DOI:10.3390/ma17174302
PMID:39274691
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11395828/
Abstract

In order to study the influence of modular filled and composite material forms on the axial crushing and energy absorption properties of structures, modular filled composite structures were constructed, and innovatively applied to the inner side of double-hat beam (DHB) structures in automobiles. The modular filled structures comprise hexagonal, quadrilateral, and triangular sections. By analyzing the collision performance of modular filled DHB structures, significant enhancements were observed in both the sectional characteristics and the specific Mean Crushing Force of modular filled DHBs compared to the conventional double-hat beam structure. These advancements notably improved the plastic deformation characteristics of the structures. Additionally, dynamic weightlessness experiments were conducted to validate the accuracy of the simulation model. Among the proposed schemes, namely QU-5, HE-5, and TR-5, notable improvements in crashworthiness were identified. Specifically, crashworthiness indicators increased by 32.54%, 78.9%, and 116.53%. Compared with other thin-walled structures, modular filled composite DHBs have advantages in axial crushing and energy absorption. By optimizing layout characteristics, the modular filled structures will achieve significant lightweight and energy absorption performance improvements. This work has clear reference value for automotive engineers and scholars to further explore the axial crash safety, platform modularization, and lightweight design of vehicles.

摘要

为了研究模块化填充和复合材料形式对结构轴向压缩和能量吸收特性的影响，构建了模块化填充复合结构，并创新性地应用于汽车双帽梁（DHB）结构的内侧。模块化填充结构包括六边形、四边形和三角形截面。通过分析模块化填充DHB结构的碰撞性能，与传统双帽梁结构相比，模块化填充DHB的截面特性和比平均压溃力均有显著提高。这些进展显著改善了结构的塑性变形特性。此外，还进行了动态失重实验以验证仿真模型的准确性。在所提出的方案中，即QU-5、HE-5和TR-5，发现其耐撞性有显著提高。具体而言，耐撞性指标分别提高了32.54%、78.9%和116.53%。与其他薄壁结构相比，模块化填充复合DHB在轴向压缩和能量吸收方面具有优势。通过优化布局特性，模块化填充结构将实现显著的轻量化和能量吸收性能提升。这项工作对汽车工程师和学者进一步探索车辆的轴向碰撞安全性、平台模块化和轻量化设计具有明确的参考价值。

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