Nacrtak In Turkey ground base skidding method is frequently used to extract log material. Physical damages occurring on the skidded log during ground based skidding cause quality and quantity loss of the log. This damage is formed by the ground structure, mass of transported logs, friction coefficient and skidding distance. In this study to improve a »Damage Prediction Model« means to predict t...

Ecological bags have been gradually adopted for ecological protection on the subgrade slope because of their good soil fixation effect, strong water retention performance, fast construction and other advantages. made natural jute obvious attributes in environmental economic efficiency. In this study, tensile tearing strength common-used cloth tested. The result shows that meet requirements stan...

The finite element technique has been accepted as a tool for modeling geotechnical complex processes. In this study, (FE) of various stages the soil-nailing process, i.e., construction and overburden pressure stages, is carried out considering different soil parameters, simulating with in-house developed laboratory models. process built in models idealized plain strain problem modeled PLAXIS so...

A fully nonlinear non-dispersive energy balance for surfzone waves is derived based on the shallow water equations (NLSWE) to study nearshore dynamics of infragravity (IG) waves. Based simulations a relatively moderate and mild beach slope with non-hydrostatic wave-flow model (SWASH), new theory shows that spatial gradients in IG flux are nearly completely balanced by combined effect bottom str...

How to quantitatively characterise the impact of underground coal mining on stability and slippage loess slopes is a key problem in evaluation damage under slopes, but it more difficult study this particular mechanical properties topographical features slopes. In order clarify seam slope, theoretical analysis, numerical simulation physical similarity experiments are used address based theory sl...

This paper presents a laboratory study to investigate the effects of bottom roughness on wave transmission across submerged coral reef that has steep fore-reef slope. Experimented models were carried out in flumes for four different bed levels: including smooth and three heights. Our investigations showed there is significant dissipation energy short-period waves (SS-waves), owing friction, com...

Abstract The origin of rebound suppression an impacting droplet by a small amount polymer additive has been tentatively explained various physical concepts including the dynamic surface tension, additional energy dissipation non-Newtonian elongational viscosity, elastic force stretched polymer, and friction on receding contact line. To better understand role molecular level, we performed multi-...

Recent research on friction in robot joints and transmission systems has considered meshing friction a position-dependent friction component. However, in this paper we show experimental evidence that meshing friction depends highly on joint speed. We identify the meshing friction in the gearboxes of a robotic leg, and we propose a new mathematical model that considers the rate dependency of mes...

Land-based plastic waste is the major source for freshwater and marine pollution. Yet, transport pathways over land remain highly uncertain. Here, we introduce a new conceptual model to forecast on land: Plastic Pathfinder ; numerical that simulates spatiotemporal distribution of macroplastic (>0.5 cm) at river basin scale. The driving forces are wind surface runoff, while resisted by te...

The estimation of the maximum wave run-up height is a problem of practical importance. Most of the analytical and numerical studies are limited to a constant slope plain shore and to the classical nonlinear shallow water equations. However, in nature the shore is characterized by some roughness. In order to take into account the effects of the bottom rugosity, various ad hoc friction terms are ...