用纤维增强塑料结构增强薄热冲压部件的疲劳强度特性

Bernd-Arno Behrens , Sven Hübner , Denis Fink , Timo Fünfkirchler , Jörn Wehmeyer , Klaus Dilger , Sven Hartwig , Christian Gundlach
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引用次数: 0

摘要

为了实现轻量化设计、高效车身结构和增强功能,汽车工业对多材料结构提出了很高的要求。这些结构利用了这种组合的良好机械性能和减轻的重量,特别是当金属和塑料结合在一起产生协同效应时。本研究论文概述了热冲压和压缩工具的进步,以促进热辅助压缩过程。该工艺可以实现GMT(玻璃垫增强热塑性塑料)和22MnB5钢的无缝连接,而无需额外的粘合剂。在该工艺的初始步骤中,热冲压工具被用来制造帽轮廓部件。然后进行GMT的联合压缩和连接过程。通过粘附,GMT材料结合到alsi涂层22MnB5的粗糙表面,从而能够去除最终组件。通过对演示部件进行静态和动态试验,评估了工艺参数的影响。总的来说,确定采用GMT加筋结构可以改善构件的静态和动态性能,因此可以减少结构的钢厚度。厚度的减少伴随着测试结构质量的减少,同时保持甚至增强其静态和动态性能。通过额外的组件和工艺优化,可以进一步减轻重量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Enhancement of thin hot-stamped components using fiber-reinforced plastic structures with improved fatigue strength characteristics
The automotive industry has high demands for multi-material structures in achieving lightweight design, efficient body construction and enhanced functionality. These structures capitalize on the favorable mechanical properties and reduced weight of such combinations, especially when metal and plastic are integrated to create a synergistic effect. This research paper outlines the advancement of a hot-stamp and an compression tool to facilitate a thermally assisted compression process. This process enables the seamless joining of GMT (Glass Mat reinforced Thermoplastics) and 22MnB5 steel without the need for additional bonding agents.
In the initial step of the process, a hot-stamping tool is utilized to fabricate cap profile components. Afterwards a combined compression and joining process of the GMT takes place. Through adhesion, the GMT material bonds to the rough surface of the AlSi-coated 22MnB5, enabling the removal of the final component.
The influence of process parameters was assessed through static and dynamic tests conducted on demonstrator components. Overall, it was determined that the introduction of a GMT stiffening structure leads to improvements in both the static and dynamic properties of the component so a reduction of the steel thickness of the structure can be carried out. This reduction in thickness is accompanied by a decrease in the mass of the test structure, while maintaining or even enhancing its static and dynamic properties. Further weight savings are possible through additional component and process optimization.
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CiteScore
3.80
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