Friction and frictional forces

In the scope of the paper studying the pile group effect in case of multilayered foundation, especially the effect of porous, medium-tight sand layers in the foundation on the load bearing capacity and subsidence of friction piles, the following issues are clarified: (i) coefficient of pile group in multi-layered foundation, with sand and clayey soil layer; (ii) distribution of forces along the pile shaft; (iii) effect of pile group on settlement of the pile group.

8p vifilm 24-09-2024 4 1   Download

Jacking force is the most crucial factor in pipe jacking engineering. The calculation of jacking force directly affects to design of back wall pipe strength and intermediate jacking station. This paper introduces and compares some agreeable methods which are being used in the world for estimating the required jacking force.

7p viyoko 24-09-2024 2 1   Download

We numerically study the effects of the size polydispersity and the friction coefficient on the compressive strength of wet granules under a diametrical compression test by using discrete element simulations. The numerical method is coupled with the capillary cohesion law which is enhanced by the cohesive forces between grains in the pendular regime.

9p vifaye 20-09-2024 1 1   Download

This study presents a formulation of the nominal’s coefficient and friction forces generated in machining between workpiece and cutting tool using cutting force profiles. The obtained equations led to the evaluation of coefficient, frictional forces and cutting inserts characterization in terms of better surface finish and lowest frictional forces.

8p tohitohi 19-05-2020 12 1   Download

This chapter provides classification of metal forming processes based on types of forces applied onto metals. • Mechanics of metal forming will be outlined to understand stress criterion for plastic deformation. • Differences between hot and cold working will be highlighted and advantages-disadvantages of hot and cold working will be given. • Effects of deformation speed and friction on metal working process will be included.

50p tieulac 27-11-2010 78 14   Download

Describe the frictional force between two objects. Differentiate between static and kinetic friction, study the properties of friction, and introduce the coefficients for static and kinetic friction.

10p kieucongviet 24-12-2009 107 9   Download