在LFT结构的头设计:制造诱导残余应力的影响

IF 1.8 Q3 ENGINEERING, MANUFACTURING
Design Science Pub Date : 2021-03-18 DOI:10.1017/dsj.2021.4
S. Revfi, Marvin Mikus, K. Behdinan, A. Albers
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引用次数: 1

摘要

摘要在长纤维增强热塑性塑料(LFT)结构的设计中,直接依赖于制造。因此,在设计过程中融入制造的影响是必不可少的。这不仅为材料和负载适应设计提供了新的机会,而且还减少了后期阶段的成本密集型修改。本贡献的目标是通过提出一种在自动优化循环中耦合LFT制造和结构模拟的方法,使复杂性易于管理。本文研究了线弹性、局部各向异性材料性能以及LFT压缩成型产生的残余应力对串珠板刚度优化设计的影响。基于本论文的模拟研究,可以总结出,考虑各向异性和残余应力的结果,与各向同性模型相比,头高度和侧面角更小。作为结论,强度约束限制了最大头高度,并且由于局部纤维取向和制造产生的残余应力,需要额外选择侧面角。优化的头截面只对特定的系统有效,因为它们取决于定义的边界条件(负载情况、初始电荷几何形状和位置、纤维方向等)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
On the bead design in LFT structures: the influence of manufacturing-induced residual stresses
Abstract In the design of long fibre reinforced thermoplastic (LFT) structures, there is a direct dependency on the manufacturing. Therefore, it is indispensable to integrate the manufacturing influences into the design process. This not only offers new opportunities for material- and load-adapted designs, but also reduces cost-intensive modifications in later stages. The goal of this contribution is to make the complexity manageable by presenting a method which couples LFT manufacturing and structural simulations in an automated optimization loop. Herein, the influence of linear-elastic, local anisotropic material properties as well as residual stresses resulting from the compression molding of LFT on the stiffness-optimized design of beaded plates is investigated. Based on the simulation studies in this contribution, it can be summarized that the resulting bead height and flank angle, considering anisotropies and residual stresses, are smaller compared to isotropic modelling. As a conclusion, the strength constraint limits the maximum bead height and the flank angle needs to be additionally chosen as a consequence of the local fibre orientations and residual stresses resulting from manufacturing. Optimized bead cross sections are only valid for a specific system under investigation, as they depend on the defined boundary conditions (load case, initial charge geometry and position, fibre orientations, etc.).
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来源期刊
Design Science
Design Science ENGINEERING, MANUFACTURING-
CiteScore
4.80
自引率
12.50%
发文量
19
审稿时长
22 weeks
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