Ramathasan Thevamaran's blog

By: Ramathasan Thevamaran (Theva)

Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA.

Research Lab: https://thevamaran.engr.wisc.edu

Dear Colleagues,

I invite you to read our recent paper on the orientation dependent plasticity mechanisms that control the dynamic creation of nanostructures and their  behavior under subsequent quasistatic microcompression published in the International Journal of Plasticity: https://doi.org/10.1016/j.ijplas.2023.103657

Dear Colleagues,

I invite you to read our recent paper on the process-structure-property relations in heterogeneous nanostructured metals created through a laser induced projectile impact of single crystal microcubes published in the Extreme Mechanics Letters: https://doi.org/10.1016/j.eml.2023.102037

Dear Colleagues,

I invite you to read our latest paper published in ACS Nano: https://pubs.acs.org/doi/10.1021/acsnano.3c01223

Dear Colleagues,

I invite you to read our recent publication on Acta Materialia on the dynamic hardness evolution in metals.

Dear Colleagues, 

I invite you to read our recent Extreme Mechanics Letters paper presenting a novel viewpoint on enhancing emissivity near exceptional point singularities in a non-Hermitian metamaterial. We present the experiments and numerical modeling in an elastodynamic framework--where the actuation forces from an actuator are enhanced by coupling to a passive dissipative non-Hermitian metamaterial--and present the theory further generalized and applicable to other physical frameworks from acoustics to optics and microwaves.

Dear Colleagues,

I invite you to read our recent paper on hierarchically architected foams published in Extreme Mechanics Letters: Read full article here.

Abstract

Dear Colleagues, Our recent publication on the Journal of Applied Mechanics:

Exceptional points (EP) are non-Hermitian degeneracies where eigenvalues and their corresponding eigenvectors coalesce. Recently, EPs have attracted attention as a means to enhance the responsivity of sensors, through the abrupt resonant detuning occurring in their proximity. In many cases, however, the EP implementation is accompanied by noise enhancement, leading to the degradation of the sensor’s performance.