BACKGROUND The aim of this study was to construct an alternative classification system for occupational hand injuries based on etiologic mechanisms and to analyze the injury patterns resulting from various mechanisms. METHODS A retrospective analysis of patients operated between January 2005 and December 2007 in two hand surgery units staffed by a team of hand surgeons was made. The patient f...

This paper investigates the energy absorption response of winding kenaf fiber composite tubes when subjected to an axial quasi-static crushing test. The square composites were prepared firstly by submerging the kenaf yarn into resin bath before it is warped around the mould for different number of layers and fiber orientations. The parameters measured were peak load, mean load and specific ener...

An apparatus is designed and fabricated for conducting experiments concerning fluidized segregation to verify a proposed design concept for a more efficient comminution machine. Previous studies have found that the fines distribute the intended crushing load imposed by the machine on the particle bed; thus, the load that must be applied to crush the larger particles increases. By removing the f...

In this paper we address some fascinating aspects of the well-known, simple demonstration of a collapsing can. An Internet search on “collapsing can” or “imploding can” gives more than 700 hits.1 Because physics and physics teaching journals have not given a corresponding amount of attention to this experiment,2 we decided to make our own contribution to the literature. We show that a careful s...

This paper explores the effect of particle breakage on mechanical behavior coarse sand through 3D Discrete Element Method (DEM) simulations direct shear tests (DST). The objective is to gain insights into macro- and micro-mechanical behaviors crushable sand, with a particular focus stress–strain relationship, volumetric deformation, evolution grain crushing. involve comparison between non-crush...

Self-centering rocking walls are known as viable alternatives to typical shear walls, as they provide a number of solutions for eliminating seismic flaws of conventional designs. These rocking walls have a generally positive impact on the seismic behavior of structural systems, but their design makes them susceptible to concrete crushing around their base, which can lead to significantly advers...

Discrete Element Method (DEM) is extensively used for mathematical modeling and simulating the behavior of discrete discs and discrete spheres in two and three dimensional space, respectively. Prediction of particles flow regime, power draw and kinetic energy for a laboratory or an industrial mill is possible by DEM simulation. In this article, a new approach was used to assess the main paramet...