tires represent a critical spare part in mines. there is a shortage of medium and large tires. in addition, with increased mining activities and the creation of new mines, the demand for tires has increased significantly. thus, it is particularly important for mining engineers to identify tire characteristics and correctly manage the spare part inventory. spare parts management is critical from...

During the period of the past five winters in Minnesota, we have witnessed a startling increase in the amount of surface wear in the wheel tracks on many pavements—both bituminous and Portland cement concrete. Previously when similar pronounced surface abrasion occurred it was generally related to some deficiency such as unfavorable con­ struction conditions or materials or mixture design that ...

Carbon-fiber-reinforced epoxy-matrix composite (CFRP) laminates with thin plies have strong damage-resistance properties compared standard prepregs. The static and fatigue tensile fracture behavior of cross-ply CFRP should be further studied to establish the applicability thin-ply prepregs for industrial structures. In this study, cross-ply, high-strength polyacrylonitrile (PAN)-based carbon-fi...

A finite element model based on the layerwise theory is developed for the analysis of transverse cracking in cross-ply laminated beams. The numerical model is developed using the layerwise theory of Reddy, and the von Kármán type nonlinear strain field is adopted to accommodate the moderately large rotations of the beam. The finite element beam model is verified by comparing the present numeric...

An analytical and numerical solution for the free vibration of laminated polymeric composite plates with different layups is studied in this paper. The governing equations of the laminated composite plates are derived from the classical laminated plate theory (CLPT) and the first-order shear deformation plate theory (FSDT). General layups are evaluated by the assumption of cross-ply and angle-p...

Gasification is a thermochemical pathways used to convert carbonaceous feedstock into syngas (CO and H2) in deprived oxygen environment. The process can accommodate conventional feedstock such as coal as well as discarded waste including plastics, rubber, and even MSW due to the high reactor temperature of 1000 to 1600oC. Pyrolysis is another conversion pathway yet it is more selective to the c...

In the decade since used tires were identified as the mode of introduction of Aedes albopictus to the United States, similar infestations have been reported from 10 other countries in the Americas and 2 in Europe. Millions of used tires are still being traded throughout the world and although a few governments have implemented inspection procedures to prevent further introductions, these are un...

Discarded vehicle tires are a common habitat for container mosquito larvae, although the environmental factors that may control their presence or abundance within a tire are largely unknown.We sampleddiscardedvehicle tires in six sites locatedwithin four counties of central Illinois during the spring and summer of 2006 to determine associations between a suite of environmental factors and commu...

Bellows are special structures that require high strength as well as good flexibility. The design, manufacture, and analysis of bellow tubes thus are more complicated. Test of bellows to understand their mechanical behavior, and to verify a design purpose finite element program is needed for practical use. In this paper, digital-image-correlation method is applied to measure the stiffness of si...