Original scientific paper Aiming at answering the questions of wear and failure of hob in the rock breaking process, the rock breaking process was simulated in different broken rock conditions by using finite element method. The relationship between normal force, lateral force, rolling force and time was obtained by rock breaking simulation analysis on the single edge disc cutter. The rock stre...

In the present study, the presence of brass mesh on the bond strength of aluminum (AA1050) strips in the cold roll bonding process was investigated. The influence of various process parameters including reduction in thickness, pre-rolling annealing, initial thickness of the strips, and post-rolling annealing was also considered. After cold roll bonding process, peeling test was carried out and ...

The radial cold rolling process is widely used in industry due to the advantages of chip removing processing. In this study, circular complex profiles were formed by cold-rolling with feed, using a patented device two roller-tools. By achieving several numerical simulations process, study aimed establish influence that maximum set force and diameter workpiece have on productivity quality trapez...

Abstract. Dynamic recrystallization of high-speed steel (HSS) M2 occurs through a discontinuous mechanism, involving nucleation and growth strain-free grains. The initiation completion dynamic (dDRX) must be carried out in single rolling pass. time for 99% dDRX depends on the critical strain, strain rate equivalent that generated workpiece material level plays key role terms possibility to comp...

Approach: The structure of the model represents the legs and trunk of a male of average height and weight. We also plan to build a female model. The model has seven rigid links, 12 actuated degrees of freedom, and a realistic mass distribution. The equations of motion are generated and solved based on Newtonian mechanics. Kinematic and force-plate data acquired from healthy, young subjects are ...

In this paper, our main objective is to present the use of Microsoft Software Excel 2007/2003 for teaching college and university level curriculum in science and engineering. In particular, we discuss two interesting and fascinating examples of interactive applications of Microsoft Excel targeted for undergraduate students in (1) computational physics and physics education, and in (2) computer ...

Abstract The phenomenon of rising bubbles in pure water is an important aspect the bubble and liquid interactions. Due to several forces that act on accompanied by pressures inside outside bubble, behaviour may vary depending a few parameters such as characteristics medium. In general, increase occurs following drag motion determined coefficient but under certain conditions also move rolling pa...

this study was conducted in split plot design based on a randomized complete block design in naghadeh region, urmia, iran in 2009-10. two sowing patterns including a1) single row planting with 50 cm between-row spacing, and a2) two rows planting on the hill with 40 cm distance and 50 cm between-row spacing (40×50) were allocated to main plots and four furrow compactions including b1) control, b...

In order to present the reasonable crown of hot rolling mills, the bend force and shift position should be pre-computed in a reasonable manner, while maintaining a good profile. How to search the optimal crown trajectory in ratio crown range is the key problem. Crown and flatness allocation strategy is researched based on dynamic programming method which has been improved and optimized by the a...

We study the effects of coupling a cosmologically rolling scalar field to higher order curvature terms. We show that when the strong coupling scale of the theory is on the 10−3 − 10−1eV range, the model passes all experimental bounds on the existence of fifth forces even if the field has a mass of the order of the Hubble scale in vacuum and non-suppressed couplings to SM fields. The reason is t...