The University of Iowa – TechConnect Briefs

Fracture of Vacancy-defected Carbon Nanotubes and Their Embedded Composites

Xiao S.P., Hou W.Y., The University of Iowa, US

In this paper, we investigate the effects of vacancy defects on the fracture of carbon nanotubes and carbon nanotube/aluminum composites. Our studies show that even a one-atom vacancy defect can dramatically reduce the failure stresses [...]

Bridging Domain Multiscale Method

Xiao S.P., Hou W.Y., The University of Iowa, US

A bridging domain method for coupling continuum models with molecular models is described. In this method, the continuum and molecular domains are overlapped in a bridging subdomain, where the Hamiltonian is taken to be a [...]

A Temperature-related Homogenization Technique for Nanoscale Continuum Approximation

Xiao S.P., Yang W.X., The University of Iowa, US

A new homogenization technique, the temperature-related Cauchy-Born (TCB) rule, is proposed in this paper with the consideration of the free energy instead of the potential energy. The TCB rule is verified via stress analyses of [...]

Studies of Nanotube-based Co-axial and Resonant Oscillators

Xiao S.P., Andersen D., Hou W.Y., The University of Iowa, US

In this paper, we first investigate mechanisms of nanotube-based co-axial oscillators, shown in Figure 1, based on molecular dynamics simulation. We mainly study the interlayer friction between the outer tube and the inner tube when [...]