Prof. Rui Zhu Profile

Prof. Rui Zhu

at Beijing Institute of Technology

SPIE Involvement:

Author

Publications (2)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 1 April 2019 Presentation + Paper

Flexural wave control via origami-based elastic metamaterials

Mingkai Zhang, Jinkyu Yang, Rui Zhu

Proceedings Volume 10972, 109720Q (2019) https://doi.org/10.1117/12.2514179

KEYWORDS: Metamaterials, Wave propagation, Bistability, Adaptive control

Read Abstract +

The overall mechanical properties of an origami can be programed by its pattern of crease, which introduces various interesting mechanical properties, such as tunable stiffness, multistability and coupled deformations. Once obtaining the knowledge about the properties of the side plates, the creases and the folding procedure, the mechanical response of origami can be completely determined. Therefore, origami with highly designable and tunable abilities offers new possibilities for the metamaterial design. In this research, we aim to combine origami with elastic metamaterials. By introducing the tunable twisting origami structure into the subwavelength-scale resonator design, a three-dimensional elastic metamaterial with low-frequency dynamic performance has been proposed, which, at the same time, has the advantages of lightweight and controllablility. The geometrical nonlinearity of the origami building block is first studied, which indicates that the large structural deformation can be harnessed to tune the effective stiffness of the origami. Further research discovers the quantitative relationship between the overall stiffness and each geometric parameter through the potential energy analysis. Then, the designed origami cell is used as an attachable resonator to control the flexural wave propagation in a metamaterial beam. Finally, both static and dynamic experiments are conducted on the origami cell and the metamaterial beam to verify the tunable stiffness and the on-demand bandgaps, respectively.

Proceedings Article | 1 April 2019 Presentation + Paper

Isolating vibrations with different polarizations via lightweight embedded metastructure

Weijia Zhao, Yitian Wang, Guoliang Huang, Rui Zhu

Proceedings Volume 10972, 109720J (2019) https://doi.org/10.1117/12.2514295

KEYWORDS: Resonators, Polarization, Vibration isolation, Structural engineering, Aluminum, 3D microstructuring, Optical simulations, Metamaterials, Aerospace engineering, Signal attenuation

Read Abstract +

Lightweight engineering structures often suffer from environmental vibration that is difficult to suppress due to its low frequency and multiple polarizations. The emerging field of metastructure offers a practical solution for the lowfrequency vibration reduction without introducing extra isolators that have gigantic size and heavy weight. In this research, 3D printed subwavelength-scale microstructures are embedded into a honeycomb structure to form a lightweight metastructure which can suppress vibrations with different polarizations at targeted frequencies. Moreover, by simply rotating the fabricated resonators from horizontal embedment into vertical embedment, the bandgaps as well as the vibration isolations can be easily switched for different vibration sources. The multi-polarization vibration suspensions have also been demonstrated with strategically positioned resonators following interval and segment arrangements. Finally, metastructures with quasi-zero dynamic stiffness are designed to achieve the ultra-low frequency vibration isolation while maintaining their lightweight.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years