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Hybride formschlüssige Strukturverbindungen in Leichtbaustrukturen aus Stahlblech und Aluminiumdruckguss

机译:由钢板和压铸铝制成的轻型结构中的混合形状配合结构连接

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摘要

The topic of this paper is the characterisation and numerical modelling of advanced sheet metal components reinforced by light metal cast structures (SADH). The modelling is focused on full car simulation. One major aspect is the discretisation of form closure connections between sheet metal and aluminium cast structure which realise the compound between both materials. A SADH structure consists of a steel sheet metal and an integrated stiffening structure of aluminium. For the manufacturing process a perforated sheet metal is placed in a high pressure die casting tool before the casting. During the casting the holes of the sheet metal are filled with aluminium and a fixed form closure connection is generated. At a demonstrator structure of a SADH typical characteristics are named and analysed. Resulting from different thermal expansion coefficients and manufacturing temperatures residual stresses and distortion are analysed. Static loading tests are carried out to analyse the mechanical performance. For a virtual development process a numerical model of a SADH is generated. To model the material characteristics thermal loading test become necessary for the sheet metal. The sheet metal is exposed to a short and high thermal treatment during the high pressure die casting process which has to be considered for the material card. At a special form closure specimen manufacturing details are investigated. This specimen is further used to generate a loading profile of form closure connections under different conditions. Based on the test data a numerical model of the form closure connections is developed on full car modelling level. The verified form closure model is then transferred to the SADH structural model. Concluding the correlation between numerical calculation and experiments is shown on the SADH structural tests.
机译:本文的主题是轻金属铸造结构(SADH)增强的高级钣金零件的表征和数值建模。建模侧重于完整的汽车仿真。一个主要方面是使金属板和铝铸件之间的形状闭合连接离散化,这实现了两种材料之间的复合。 SADH结构由钢板金属和集成的铝加强结构组成。对于制造过程,在铸造之前将穿孔的金属板放入高压压铸工具中。在铸造过程中,金属板的孔填充有铝,并形成了固定形式的闭合连接。在SADH的演示器结构中,对典型特性进行命名和分析。由于热膨胀系数和制造温度的不同,分析了残余应力和变形。进行静态载荷测试以分析机械性能。对于虚拟开发过程,将生成SADH的数值模型。为了模拟材料特性,钣金必须进行热负荷测试。在高压压铸过程中,金属薄板经受了短时高温热处理,这对于材料卡来说是必须考虑的。在一种特殊形式的封闭样品中,调查了制造细节。该样品还用于在不同条件下产生形状闭合连接的载荷曲线。根据测试数据,在全车模型级别上开发了闭合连接的数值模型。然后将验证后的表单关闭模型转移到SADH结构模型中。 SADH结构测试显示了数值计算与实验之间的相关性结论。

著录项

  • 作者

    Pasligh Niels;

  • 作者单位
  • 年度 2011
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  • 原文格式 PDF
  • 正文语种 ger
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