Investigation of a magnetorheological elastomer metamaterial sandwich beam with tunable graded stiffness for broadband vibration attenuation

Investigation of a magnetorheological elastomer metamaterial sandwich beam with tunable graded stiffness for broadband vibration attenuation

Metamaterials with local resonance show promising application prospects in low-frequency vibration attenuation. However, with the drawback of narrow band gap, such potential is greatly limited. In order to broaden the local resonant band gap, a semi-active graded magnetorheological elastomer (MRE) m...

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Veröffentlicht in:Smart materials and structures 2023-06, Vol.32 (6), p.65022
Hauptverfasser: Wang, Yuhuai, Yang, Jian, Chen, Zexin, Lin, Yu, Gong, Liping, Zhang, Shiwu, Li, Weihua, Sun, Shuaishuai
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broadband vibration attenuation
magnetorheological elastomer metamaterial
tunable graded stiffness strategy
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container_issue 6
container_start_page 65022
container_title Smart materials and structures
container_volume 32
creator Wang, Yuhuai
Yang, Jian
Chen, Zexin
Lin, Yu
Gong, Liping
Zhang, Shiwu
Li, Weihua
Sun, Shuaishuai
description Metamaterials with local resonance show promising application prospects in low-frequency vibration attenuation. However, with the drawback of narrow band gap, such potential is greatly limited. In order to broaden the local resonant band gap, a semi-active graded magnetorheological elastomer (MRE) metamaterial sandwich beam (GMREMSB) with real-time tunable graded stiffness was proposed and investigated in this study. For theoretical calculation, a mass-spring model was established for the GMREMSB. Then the calculated band gap and transmissibility using Timoshenko beam theory and spectral element method were compared. An experimental test was also conducted for verification. The results show that the bandwidth of the proposed GMREMSB can be widened by the graded stiffness arranged in ascending order. The experimental band gap of the GMREMSB under the graded current of 0.0–0.5–1.0 A is 6.4 Hz wider than the band gap of the periodic structure with the single current of 0.0 A and is 5.0 Hz wider than that of 1.0 A. The growth rate reaches 15.06% and 11.39%, respectively.
doi_str_mv 10.1088/1361-665X/acd289
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However, with the drawback of narrow band gap, such potential is greatly limited. In order to broaden the local resonant band gap, a semi-active graded magnetorheological elastomer (MRE) metamaterial sandwich beam (GMREMSB) with real-time tunable graded stiffness was proposed and investigated in this study. For theoretical calculation, a mass-spring model was established for the GMREMSB. Then the calculated band gap and transmissibility using Timoshenko beam theory and spectral element method were compared. An experimental test was also conducted for verification. The results show that the bandwidth of the proposed GMREMSB can be widened by the graded stiffness arranged in ascending order. The experimental band gap of the GMREMSB under the graded current of 0.0–0.5–1.0 A is 6.4 Hz wider than the band gap of the periodic structure with the single current of 0.0 A and is 5.0 Hz wider than that of 1.0 A. 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The results show that the bandwidth of the proposed GMREMSB can be widened by the graded stiffness arranged in ascending order. The experimental band gap of the GMREMSB under the graded current of 0.0–0.5–1.0 A is 6.4 Hz wider than the band gap of the periodic structure with the single current of 0.0 A and is 5.0 Hz wider than that of 1.0 A. The growth rate reaches 15.06% and 11.39%, respectively.</abstract><pub>IOP Publishing</pub><doi>10.1088/1361-665X/acd289</doi><tpages>15</tpages><orcidid>https://orcid.org/0000-0002-6376-8231</orcidid><orcidid>https://orcid.org/0000-0002-6190-8421</orcidid><orcidid>https://orcid.org/0000-0001-7118-7704</orcidid><orcidid>https://orcid.org/0000-0002-8695-9217</orcidid></addata></record>
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magnetorheological elastomer metamaterial
tunable graded stiffness strategy
title Investigation of a magnetorheological elastomer metamaterial sandwich beam with tunable graded stiffness for broadband vibration attenuation
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