Based on a series of shaking table model tests, it was found that the eŠects of 1) subsoil and backˆll deformation, 2) failure plane formation in backˆll, and 3) pullout resistance mobilized by the reinforcements on the seismic behaviors of the geosynthetic reinforced soil retaining walls (GRS walls) were signiˆcant. These eŠects cannot be taken into account in the conventional pseudo-static ba...

Cohesive zone models are explored in order to study cleavage fracture in adhesive bonded joints. A mode I cohesive model is defined which correlates the tensile traction and the displacement jump (crack faces opening) along the fracture process zone. In order to determine the traction-separation relation, the main fracture parameters, namely the cohesive strength and the fracture energy, as wel...

A numerical algorithm for fully–dynamical lubrication problems based on the Elrod– Adams formulation of Reynolds equation with mass–conserving boundary conditions is described. A simple but effective relaxation scheme is used to update the solution maintaining the complementarity conditions on the variables that represents the pressure and fluid fraction. The equations of motion are discretized...

Bolted joints are widely used in industrial rotating machines to fasten the adjacent disks together and affect system dynamic properties. Therefore, there is a strong need study their influence on response of such systems. This paper investigated effect eccentric phase difference disk bolted-disk joint rotor dynamics, which takes into account time-varying bending stiffness bolted joint. The mod...

A high-order Absorbing Boundary Condition (ABC) is devised on an artificial boundary for time-dependent elastic waves in unbounded domains. The configuration considered is that of a two-dimensional elastic waveguide. The proposed ABC is an extension of the Hagstrom-Warburton ABC which was originally designed for acoustic waves, and is applied directly to the displacement field. The order of the...

The concurrent bridging of molecular dynamics and continuum thermodynamics presents a number of challenges, mostly associated with energy transmission and changes in the constitutive description of a material across domain boundaries. In this paper, we propose a framework for simulating coarse dynamic systems in the canonical ensemble using the quasicontinuum method (QC). The equations of motio...

What attracted you to science editing? Complete chance. Having recently abandoned a PhD, on the grounds of hopeless incompetence, I was at home when I received a phone call from the deputy editor of Nature, Peter Newmark, asking if I would like to come and work there as a locum, to cover for the sabbatical absence of Miranda Robertson, a senior member of the biology team; they knew of my availa...

Steel-concrete composite girder bridges, in essence, are thin-walled structures, the dynamic responses of which will be greater than those a typical Euler–Bernoulli beam under train-bridge interaction because shear lag and interface slip. Thus, this study, analysis model train-composite box bridge-multiple tuned mass damper (MTMD) coupling system is proposed, with derived equations time-varying...