This article discusses a new polyethylene-based metamaterial designed for acoustic control, emphasizing a relaxed micromorphic modeling approach for finite-sized metamaterials. Key findings include the development of automation in the fitting procedure of relaxed micromorphic parameters, improving accuracy in handling cut-offs and asymptotes during analysis. The study demonstrates robust consistency of the model relative to changes in material properties and unit cell size. Future research directions include further enhancing the model with additional parameters to broaden its applications in sound control technology.
The fitting procedure we present has been largely automated, allowing for precise control of cut-offs and minimizing asymptotes' mean square error against numerical values.
Our results indicate that the relaxed micromorphic model can be enhanced further by incorporating additional micromorphic parameters, opening avenues for future investigations.
The relaxed micromorphic parameters show significant consistency regarding changes in the unit cell's material properties and size, confirming the robustness of our modelling approach.
This research underscores the potential of polyethylene-based metamaterials in acoustic applications, providing a basis for improved designs in sound control and material sciences.
#metamaterials #acoustic-engineering #relaxed-micromorphic-model #finite-size-modeling #polyethylene
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