• Origami Metamaterials for Tunable Thermal Expansion
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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

Boatti E, Vasios N, Bertoldi K. Origami Metamaterials for Tunable Thermal Expansion. Advanced Materials. 2017;29 (26).Abstract

Materials with engineered thermal expansion, capable of achieving targeted area/volume changes in response to variations in temperature, are important for a number of aerospace, optical, energy, and microelectronic applications. While most of the proposed structures with engineered coefficient of thermal expansion consist of bi-material 2D or 3D lattices, here it is shown that origami metamaterials also provide a platform for the design of systems with a wide range of thermal expansion coefficients. Experiments and simulations are combined to demonstrate that by tuning the geometrical parameters of the origami structure and the arrangement of plates and creases, an extremely broad range of thermal expansion coefficients can be obtained. Differently from all previously reported systems, the proposed structure is tunable in situ and nonporous.

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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

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