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
基本信息
- 批准号:398244070
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:德国
- 项目类别:Research Grants
- 财政年份:2018
- 资助国家:德国
- 起止时间:2017-12-31 至 2021-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The ultrasonic welding has been established in the industry since the 1960s. Up to now, the design of the joining parts is usually based on the user experience. As well as the geometric design of the joining part bodies, which has to be suitable for welding, an appropriate component construction requires the consideration of constructive details, such as a process-specific design of the joining zone geometry. Additional functional elements or rib structures, which directly affect the structure-borne sound processes and thus the welding process, are often also to be taken into account. In general, extensive practical trials are necessary before the start of production.The component development also requires extensive practical trials for the determination of the welding parameters. In many cases, iterative elaborate and cost-intensive redesigns of the injection moulding tools arise to influence the sound propagation, so that a high-quality weld seam is achieved. The material analysis of the dynamic stiffness and damping behaviour of plastics is challenging due to the high frequencies of ultrasonic welding, and can only be carried out by means of iterative approaches. Realistic simulation of the acoustic structure interactions can be contributed to detect and avoid critical areas. However, input data are required, which precisely reflect the viscoelastic material behaviour of thermoplastic plastics.The aim of the research project is a further development of an alternative method, which is based on a reverse engineering process. This is supposed to determine mechanical characteristic values for an amorphous plastic (PMMA) and two semi-crystalline plastics (PP and PA), which allow a model description of the complex structure-borne sound processes in joining parts for the ultrasonic welding process, taking into account thermal influences.With the help of the research results, it is to be shown that the appropriate joining part design can already take place in the design phase. As a result, time and cost-intensive iterations in the development phase of complex joining parts will be omitted. Furthermore, a comprehensive basis for a better material and process understanding of the highly dynamic ultrasonic welding process and the sound propagation will be created.
自20世纪60年代以来,超声波焊接已在行业中确立。到目前为止,连接部件的设计通常基于用户体验。除了必须适合于焊接的连接部件主体的几何设计之外,适当的部件构造还需要考虑构造细节,例如连接区域几何形状的工艺特定设计。通常也要考虑附加的功能元件或肋结构,它们直接影响固体声过程,从而影响焊接过程。一般来说,在开始生产之前,需要进行大量的实际试验。部件开发也需要进行大量的实际试验,以确定焊接参数。在许多情况下,注塑模具的反复精心设计和成本密集型重新设计会影响声音传播,从而实现高质量的焊缝。由于超声波焊接的高频率,塑料动态刚度和阻尼行为的材料分析具有挑战性,并且只能通过迭代方法进行。声学结构相互作用的真实仿真可以有助于检测和避免关键区域。然而,需要输入数据,这些数据精确地反映了热塑性塑料的粘弹性材料行为。该研究项目的目的是进一步开发一种基于逆向工程过程的替代方法。这是为了确定非晶塑料(PMMA)和两种半结晶塑料的机械特性值(PP和PA),它允许在考虑热影响的情况下,对超声波焊接过程中连接部件的复杂结构声过程进行模型描述。借助研究结果,可以看出,在设计阶段就可以进行适当的连接部件设计。因此,在复杂连接部件的开发阶段中的时间和成本密集型迭代将被省略。此外,还将为更好地理解高动态超声波焊接过程和声音传播的材料和工艺奠定全面的基础。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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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
Interactions in laser joining of metals to polymers
金属与聚合物激光连接中的相互作用
- 批准号:
417913350 - 财政年份:2019
- 资助金额:
-- - 项目类别:
Research Grants
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
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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