This paper describes the experimental and numerical study on axial compressive behaviour of circular-in-circular concrete-filled double-skin steel tube (CFDST) stub columns with large void ratio. Nine specimens various ratio (Rv), diameter-to-thickness outer (Do/to) strength concrete (fcu) were tested under compression. The failure patterns, load versus displacement (strain) relationship, ultim...

A hollow cylinder apparatus was used to study some engineering properties of hollow cylindrical sand specimens prepared using the wet-pluviation technique. The refined specimen preparation method displayed good repeatability. Wet pluviation produced inherently cross-anisotropic specimens, with the level of initial anisotropy reducing with decreasing initial void ratio. The variation in the init...

Motivated by a recently developed technique for measuring soft materials properties at the tip of an embedded needle [Zimberlin, et al., Soft Matter, 2007, 3, 763], the mechanics of elasticity- and surface tension-governed void growth within a neo-Hookean material is explored. Previous efforts to describe this technique relied on a hybrid spherical void/spherical cap approximation, thus assumin...

This study observes that copper (Cu) films deposited by high current densities or in an aged electrolyte easily generate void defects after chemical mechanical polishing (CMP). The (111)/(200) ratio and the impurity amount of an electroplated Cu film are found to have strong correlation with the formation of void defects. Furthermore, pulse-reverse waveform plating following direct current plat...

This report describes the static and dynamic loading of a 12-inch-wide by 18-inch-deep by 6-foot-long rigid footing, representing the strip footing of a subsurface shelter. Boundary conditions simulated those of a torsionally restrained footing of a flexible arch structure with simulated overburden of 20 feet at one side of the footing. Saturated and partially saturated sand was the test soil. ...