Adaptive Multifunctional Composites

機譯：自適應多功能復合材料

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The adaptive multifunctional composite structure studied here is to address two issues remaining in lightweight structural composites required by many engineering applications. The first is to add additional functionality to multifunctional composites and the second is to provide adaptive damping in structures that cover a wide range of frequencies and temperatures. Because of its potential for practical payoffs, passive structural damping can find wide application through the use of high-damping viscoelastic polymers or elastomers. However, all passive damping using these damping materials suffer from failing at certain temperatures and in certain frequency ranges. The extreme environments often seen by engineering systems provide high temperature, which is exactly where damping levels in structures reduce causing unacceptable vibrations. In addition, as loading frequencies reduce damping levels also fall off, and many loads experienced by large structures are low frequency. The proposed research addresses increasing the range of effectiveness of damping by addressing the temperature and frequency dependence of material damping by using a multifunctional composite system containing an active element. Previous research has yielded a finite element model of linear viscoelastic material and structural behavior that captures characteristic frequency-dependent behavior, continuing research has addressed the accommodation of temperature dependence, and the examination of the new concept of 'electronic damping' or 'e-damping'. The resulting modeling approach is validated through experimental validation.

機譯：本文研究的自適應多功能復合材料結構旨在解決許多工程應用所需的輕型結構復合材料中仍然存在的兩個問題。第一個是向多功能復合材料添加其他功能，第二個是在覆蓋廣泛頻率和溫度范圍的結構中提供自適應阻尼。由于其潛在的實際回報，通過使用高阻尼粘彈性聚合物或彈性體，被動結構阻尼可以得到廣泛的應用。但是，使用這些阻尼材料的所有被動阻尼在某些溫度和某些頻率范圍內都會失效。工程系統經常看到的極端環境會提供高溫，這正是結構中的阻尼水平降低而導致不可接受的振動的地方。另外，隨著負載頻率的降低，阻尼水平也隨之降低，大型結構所承受的許多負載都是低頻的。擬議的研究通過使用包含活性元素的多功能復合系統來解決材料阻尼的溫度和頻率依賴性，從而解決了增加阻尼有效性的問題。先前的研究產生了線性粘彈性材料和結構行為的有限元模型，該模型捕獲了特征頻率相關的行為，繼續的研究解決了溫度相關性的適應性問題，并研究了“電子阻尼”或“電子阻尼”的新概念。 '。通過實驗驗證對生成的建模方法進行了驗證。

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來源
《Micro- and nanotechnology sensors, systems, and applications V ; Flexible electronics》|2013年|87250B.1-87250B.10|共10頁
會議地點 Baltimore MD(US)
作者
Ya Wang; Daniel J. Inman;
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作者單位

Department of Aerospace Engineering University of Michigan Ann Arbor, MI 48109;

Department of Aerospace Engineering University of Michigan Ann Arbor, MI 48109;

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原文格式 PDF
正文語種 eng
中圖分類
關鍵詞
adaptive; multifunctional; viscoelastic modeling; electronic damping;

機譯：適應性多功能粘彈性模型；電子阻尼;

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Adaptive Multifunctional Composites

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