• miura_kirigami_small
  • bas

Welcome

Welcome to the Bertoldi Group at Harvard University. In our research, we combine theoretical, computational and experimental methods to gain deeper insight into the non-linear behavior of materials and structures. Guided by theoretical and numerical analysis, we exploit material and geometric non-linearities to design novel materials with tunable exceptional properties, and we seek to create and test such materials. Read more about some of our recent and ongoing research projects in the Research section.

Recent Publications

Wang P, Zheng Y, Fernandes MC, Sun Y, Xu K, Sun S, Kang SH, Tournat V, Bertoldi K. Harnessing Geometric Frustration to Form Band Gaps in Acoustic Networks. Physical Review Letters [Internet]. 2017;118 (8) :084302. Publisher's VersionAbstract

We demonstrate both numerically and experimentally that geometric frustration in two-dimensional periodic acoustic networks consisting of arrays of narrow air channels can be harnessed to form band gaps (ranges of frequency in which the waves cannot propagate in any direction through the system). While resonant standing wave modes and interferences are ubiquitous in all the analyzed network geometries, we show that they give rise to band gaps only in the geometrically frustrated ones (i.e., those comprising of triangles and pentagons). Our results not only reveal a new mechanism based on geometric frustration to suppress the propagation of pressure waves in specific frequency ranges but also open avenues for the design of a new generation of smart systems that control and manipulate sound and vibrations.

More

Latest News

Welcome Bolei, Eder and Tim!

Welcome Bolei, Eder and Tim!

August 30, 2016

We welcome Bolei Deng and Eder Medina who will join our lab as Graduate Students. We also welcome Tim, who will be a visiting student.

Sahab defense

Sahab defense

June 29, 2016

Congratulations to Dr. Sahab Babaee for a successful defense.

Bas defense

Bas defense

April 18, 2016

Congratulations to Dr. Johannes Overvelde for a brilliant defense. Well done Bas!

Jia defense

Jia defense

March 25, 2016

Congratulations to Dr. Jia Liu for a successful defense

More