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首页> 外文期刊>Mechanical systems and signal processing >Determination of equivalent transversely isotropic material parameters for sheet-layered lamination stacks
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Determination of equivalent transversely isotropic material parameters for sheet-layered lamination stacks

机译：用于片层层叠层叠层的等同横向各向同性材料参数的测定

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This paper covers the accurate prediction of equivalent homogenized material parameters for sheet-layered lamination stacks, which are located in rotors and stators of electric motors. Modeling the structural and dynamic behavior of these parts is a challenging task due to the special layered design of these stacks, with a huge influence of the applied joining technology, here a full-surface bonding. For the derivation of equivalent transversely isotropic material parameters, three procedures, namely the rule of mixture, an analytical and numerical homogenization, are compared eventuating in only minor differences between them. The investigations show that rather the input parameters for these averaging methods, i.e. the individual material parameters of each layer, are crucial for an accurate modeling. Experimental tests are carried out on coated sheet laminations to determine the initially unknown bonding varnish thickness with two different measurement methods, the 3D laser scanning microscopy and instrumented indentation testing, resulting in almost equivalent and reasonable values. The capability of the ab initio deduced material parameters is demonstrated by comparing an experimental and numerical modal analysis of a sample lamination stack showing an almost perfect agreement. By this, it is also revealed that a varnish Young's modulus measured by nanoindentation is overestimated from a macroscopic point of view. Damping parameters of a bonded lamination stack are determined with the help of the experimental modal analysis showing a relatively low damped system.
机译：本文涵盖了片状层压堆的等效均质材料参数的精确预测，该层叠叠层位于电动机的转子和定子中。由于这些堆叠的特殊分层设计，建模这些部件的结构和动态行为是一个具有挑战性的任务，具有巨大的应用加入技术，这里是一种全面粘合。对于等效的横向各向同性材料参数的推导，三种程序，即混合物的规则，分析和数值均质化，比在它们之间仅进行微小的差异比较。该研究表明，对于这些平均方法的输入参数，即每层的各个材料参数，对于准确建模是至关重要的。实验测试在涂层板叠层上进行，以确定具有两种不同的测量方法的最初未知的粘合清漆厚度，3D激光扫描显微镜和仪表压痕测试，导致几乎等同的值和合理的值。通过比较样品层压堆叠的实验性和数值模态分析，证明了AB初始推导的材料参数的能力。由此，还揭示了通过纳米indentation测量的清漆杨氏模量从宏观的角度估计。借助于示出相对低的阻尼系统的实验模态分析确定粘合层叠堆的阻尼参数。

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