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Damping Characterization of Hybrid Carbon Fiber Elastomer Metal Laminates using Experimental and Numerical Dynamic Mechanical Analysis

1
Karlsruhe Institute of Technology, Institute for Applied Materials, Engelbert-Arnold-Strasse 4, D-76131 Karlsruhe, Germany
2
Karlsruhe Institute of Technology, Institute of Vehicle System Technology, Lightweight Technology, Rintheimer Querallee 2, D-76131 Karlsruhe, Germany
*
Author to whom correspondence should be addressed.
J. Compos. Sci. 2019, 3(1), 3; https://doi.org/10.3390/jcs3010003
Received: 19 November 2018 / Revised: 23 December 2018 / Accepted: 28 December 2018 / Published: 4 January 2019
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Abstract

Lightweight structures which consist to a large extent of carbon fiber reinforced plastics (CFRP), often lack sufficient damping behavior. This also applies to hybrid laminates such as fiber metal laminates made of CFRP and aluminum. Since they are usually prone to vibrations due to their high stiffness and low mass, additional damping material is required to meet noise, vibration and harshness comfort demands in automotive or aviation industry. In the present study, hybrid carbon fiber elastomer metal laminates (HyCEML) are investigated which are intended to influence the damping behavior of the laminates by an elastomer interlayer between the CFRP ply and the aluminum sheets. The damping behavior is based on the principle of constrained layer damping. To characterize the damping behavior, dynamic mechanical analyses (DMA) are performed under tension on the elastomer and the CFRP, and under three point bending on the hybrid laminate. Different laminate lay-ups, with and without elastomer, and two different elastomer types are examined. The temperature and frequency dependent damping behavior is related to the bending stiffness and master curves are generated by using the time temperature superposition to analyze the damping behavior at higher frequencies. A numerical model is built up on the basis of DMA experiments on the constituents and micro mechanical studies. Subsequently, three point bending DMA experiments on hybrids are simulated and the results are compared with the experimental investigations. In addition, a parameter study on different lay-ups is done numerically. Increasing vibration damping is correlated to increasing elastomer content and decreasing elastomer modulus in the laminate. A rule of mixture is used to estimate the laminate loss factor for varying elastomer content. View Full-Text
Keywords: fibre metal laminate; dynamic mechanical analysis; damping; CFRP; elastomer; aluminum; numerical analysis; viscoelasticity fibre metal laminate; dynamic mechanical analysis; damping; CFRP; elastomer; aluminum; numerical analysis; viscoelasticity
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Sessner, V.; Jackstadt, A.; Liebig, W.V.; Kärger, L.; Weidenmann, K.A. Damping Characterization of Hybrid Carbon Fiber Elastomer Metal Laminates using Experimental and Numerical Dynamic Mechanical Analysis. J. Compos. Sci. 2019, 3, 3.

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J. Compos. Sci. EISSN 2504-477X Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
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