In recent years, significant research efforts have been dedicated to developing self-powered wireless sensors without the limit of battery lifetime, such that those sensors can be deployed to continuously monitor structural conditions and detect potential failures for Structural Health Monitoring (SHM). In order to overcome the energy bound, a mechanism has recently been developed to harvest el...

In this paper, the behavior of free vibrations and buckling of the sandwich panel with a flexible core was investigated using a new improved ‎high-order sandwich panel theory. In this theory, equations of motion were formulated based on shear stresses in the core. First-order shear deformation theory was ‎applied for the procedures. In this theory, for the first time, incompatibility problem of...

Bacteria swim by rotating rigid helical flagella and periodically reorienting to follow environmental cues1,2. Despite the crucial role of reorientations, their underlying mechanism has remained unknown for most uni-flagellated bacteria3,4. Here, we report that uni-flagellated bacteria turn by exploiting a finely tuned buckling instability of their hook, the 100-nm-long structure at the base of...

In the present study, the dynamic compressive behavior of aluminum-alloy-based tetrahedral-core truss structures is investigated as a function of impact velocity using a split Hopkinson pressure bar. The results are used to understand the phenomenon of buckling in truss structures as a function of loading rates and test temperatures, and its implication on the dynamic crush resistance of tetrah...

The delamination buckling approach provides a facile means to dynamically control the optical transmittance of extremely flexible and stretchable graphene oxide coatings with fast response time. Such graphene oxide coatings can be deposited by scalable solution-processing methods for potential applications in dynamic glazing.

In the present study, the buckling analysis of the rectangular nanoplate under biaxial non-uniform compression using the modified couple stress continuum theory with various boundary conditions has been considered. The simplified first order shear deformation theory (S-FSDT) has been employed and the governing differential equations have been obtained using the Hamilton’s principle. An analytic...

The transformation of the straight embryonic heart tube into a helically wound loop is named cardiac looping. Such looping is regarded as an essential process in cardiac morphogenesis since it brings the building blocks of the developing heart into an approximation of their definitive topographical relationships. During the past two decades, a large number of genes have been identified which pl...