Interactions in laser joining of metals to polymers

金属与聚合物激光连接中的相互作用

基本信息

项目摘要

The joining of metals and plastics becomes more and more important due to the increasing use of plastics in many industrial sectors and an increased demand for lightweight structures. This trend is reinforced by a development towards miniaturization and functional integration in the electrical industry as well as by the utilization of specific lightweight potentials of materials that are used in the automotive sector. Such compounds are, however, procedurally not easy to realize as the materials have very different physical and mechanical properties. Within this context, flat, firmly bonded compounds are especially difficult to realize.It is the aim of this research project to investigate the adhesion mechanisms and composite properties of firmly bonded, laser beam joined plastic-metal composites that were subjected to physical / chemical surface pre-treatments. The metallic specimens will be directly joined to the plastic specimen by using two different configurations in a lap joint procedure, utilizing direct as well as indirect laser beam joining processes. In a first step, significant influencing factors on the bond strength of thermally joined metal-plastic joints will be determined. The correlation of the process parameters and the obtained bond strengths allows the determination of useful process windows for selected material combinations. For this purpose, the failure behavior of thermal joints is analyzed and evaluated. Subsequently, an examination of the bonding strength and adhesion mechanisms is conducted in relation to the plasma pretreatment /coating. Additionally, the influence of the plasma pretreatment /coating on the aging of the composite is investigated. Furthermore, metal-plastic composites with metallic interlayers will be produced and examined concerning their bond strength and adhesion mechanisms. The influence of the metallic interlayers on the aging of the composite will be investigated as well. In the part that is concerned with modeling, the thermal and thermo-mechanical images of the direct and indirect laser beam joining processes will be used to calculate the local temperature fields as well as the thermally induced stresses. Finally, the process variants with a plasma pretreatment / coating or with metallic interlayers will be compared and evaluated.
由于塑料在许多工业部门中的使用越来越多,以及对轻质结构的需求增加,金属和塑料的连接变得越来越重要。电子工业向着小型化和功能集成化的发展,以及汽车部门使用的材料的特殊轻量化潜力的利用,加强了这一趋势。然而,这种化合物在程序上不容易实现,因为这些材料具有非常不同的物理和机械性能。在这种背景下,平板、牢固结合的化合物尤其难以实现。本研究项目的目的是研究经过物理/化学表面处理的牢固结合、激光连接的塑料-金属复合材料的结合机理和复合材料性能。金属试件将在搭接过程中使用两种不同的配置直接连接到塑料试件,采用直接和间接激光连接工艺。在第一步中,将确定对热连接金属-塑料接头粘接强度的重要影响因素。工艺参数和所获得的结合强度的相关性允许确定所选材料组合的有用工艺窗口。为此,对热接头的失效行为进行了分析和评价。随后,对与等离子处理/涂层有关的结合强度和结合机理进行了检查。此外,还研究了等离子体前处理/涂层对复合材料老化的影响。此外,还将制作具有金属夹层的金属-塑料复合材料,并研究其结合强度和粘接机理。研究了金属过渡层对复合材料时效性能的影响。在建模部分,将使用直接和间接激光拼接过程的热图像和热机械图像来计算局部温度场和热应力。最后,将比较和评估使用等离子预处理/涂层或使用金属中间层的工艺变体。

项目成果

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Professor Dr.-Ing. Christian Hopmann其他文献

Professor Dr.-Ing. Christian Hopmann的其他文献

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{{ truncateString('Professor Dr.-Ing. Christian Hopmann', 18)}}的其他基金

Development of a databased model for the prediction of effective mechanical and thermal properties of injection-moulded semi-crystalline thermoplastics by means of an artificial neural network (KNN) taking into account the microstructure
开发数据库模型,通过考虑微观结构的人工神经网络 (KNN) 来预测注塑半结晶热塑性塑料的有效机械和热性能
  • 批准号:
    426052003
  • 财政年份:
    2019
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Analysis and modeling of the damage behavior of long-fibre-reinforced semi-crystalline thermoplastics considering fibre length and fibre curvature
考虑纤维长度和纤维曲率的长纤维增强半结晶热塑性塑料的损伤行为分析和建模
  • 批准号:
    416461157
  • 财政年份:
    2019
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Simulation of the development of the microstructure of injection-moulded semi-crystalline thermoplastics by means of a multi-scale approach under consideration of shear-induced crystal forms (alpha and beta)
在考虑剪切诱导晶型(α 和 β)的情况下,通过多尺度方法模拟注塑半结晶热塑性塑料的微观结构的发展
  • 批准号:
    408012354
  • 财政年份:
    2019
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Experimental and numerical investigations of laminated, fibre reininforced plastics under crash loading
碰撞载荷下层压纤维增强塑料的实验和数值研究
  • 批准号:
    404502442
  • 财政年份:
    2018
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Development and validation of a method to determine the frequency- and temperature-dependent stiffness and damping properties of plastics for the structure-borne noise simulation more precisely using the example of the for the ultrasonic welding process r
开发和验证一种方法,以确定塑料的与频率和温度相关的刚度和阻尼特性,以使用超声波焊接工艺的示例更精确地进行结构噪声模拟
  • 批准号:
    398244070
  • 财政年份:
    2018
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Analysis and modelling of the environmental stress cracking resistance of short fiber reinforced amorphous thermoplastics
短纤维增强非晶态热塑性塑料的耐环境应力开裂性能分析与建模
  • 批准号:
    369874665
  • 财政年份:
    2017
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Analysis of the flow paths in a rubber internal mixer in dependency of different process parameters
橡胶密炼机中不同工艺参数的流路分析
  • 批准号:
    377803088
  • 财政年份:
    2017
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Integrative calculation of the weld strength of plastics parts based on an interdiffusion model presented for laser transmission welding
基于激光透射焊接相互扩散模型的塑料件焊接强度综合计算
  • 批准号:
    321043881
  • 财政年份:
    2016
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Fundamental research on foaming of elastomers with water as physical blowing agent and description of mechanisms of foaming
水为物理发泡剂的弹性体发泡基础研究及发泡机理描述
  • 批准号:
    317030171
  • 财政年份:
    2016
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Development and analysis of a material model based on the reptation theory for the description of the strain behaviour of PET at high strain rates
基于蠕动理论的材料模型的开发和分析,用于描述 PET 在高应变率下的应变行为
  • 批准号:
    328107189
  • 财政年份:
    2016
  • 资助金额:
    --
  • 项目类别:
    Research Grants

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  • 批准号:
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纳米线的激光连接和组装:加工、结构、特性和性能
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Laser joining and assembly of nanowires: processing, structure, properties and performance
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ULTIMATE - Unconvensional Laser joining Technology for multI-MATErial products
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