Shear strength

shows that the strength of any free running kind of soil is depend on friction between particles. In civil engineering works, soil is mainly under pressure. So, the compressibility of the soil is an important parameter, which affect the performance of the structural. Thus, shear strength and dilation are two characteristic behaviour of BIM soil. This project will take a representative BIM soil, sand-gravel mixture as an example. To find how gravel content influence shear strength

lim┬(η→∞)⁡〖f^' (η)〗 = 1 Where λ=u_w/u_∞ is the plate velocity ratio that represents the direction and magnitude of the moving plate. The skin friction coefficient C_f can be defined as: C_f=τ_w/(ρ〖〖 u〗_∞〗^2 ) (9) Where τ_w is the surface shear stress which is given by: τ_w=├ μ(∂u/∂y)┤| y=0 (10) Substituting Eqs.(5),(6) into Eqs. (9) and (10) we obtain: √(2〖Re〗_x ) C_f=f^'' (0) (11) Where 〖Re〗_x is the local Reynolds number. Looking for Similarity solution for energy equation, Eq

The National Transportation Safety Board. 2001. Runway Overrun During Landing, American Airlines Flight 1420, McDonnell Douglas MD-82, N215AA, Little Rock, Arkansas, June 1, 1999. Aircraft Accident Report NTSB/AAR-01/02. Washington, DC. Abstract: This report is an overview of the accident that occurred on American Airlines flight 1420 that occurred on a McDonnell Douglas MD-82 aircraft in Little Rock, Arkansas on June 1, 1999. The plane overran the runway during adverse weather that took place at

This work presents a system of a non-linear PDEs, which governing the MHD flow of a Homann nanofluid with heat and mass transfer through a porous medium. The problem is solved numerically by making use of the finite difference method. The formulas of the velocity components, temperature and concentration are obtained as functions of the problem physical parameters. The effects of these parameters on the solutions are illustrated numerically and graphically through a set of figures to reinforce the

I stood there with the dull, black, kitchen scissors in my hand opening and closing them in thoughtful anticipation. This was it. This was the moment I decided to be recklessly happy. I had wanted a haircut for a long time and now I was going to get what I wanted regardless of the consequences. On November 15, 2015, I decided to cut all of my hair off which gave me the courage to be myself whilst handling the consequences, and through it all I learned that my happiness was more important than making

jolted out of her seat when the plane encountered turbulence. She suffered fatal injuries when she hit the armrest on the way back down. The passenger was not wearing a seatbelt; according to the NTSB accident brief (Brief of Accident). Wind Shear Wind shear is a sudden drastic change in wind speed and direction that generally

Microburst and wind shear avoidance As we all know, safety is fundamental to the aviation industry. There are many factors will cause dangerous to flights, such as human factors, problem of aircraft structures and so on. Flight safety has many challenges. Due to the climate variability and suddenness, meteorology has become a severe problem in aviation. Many air crashes are in the result of bad weather. In generally speaking, there are several weather phenomenon have much influence on flights, like

is the region that is closest to the wall. Turbulent motions in the region are affected by friction and possess relatively low Reynolds number. Viscosity is dominant in this region and it ranges around〖 y〗^+≤5. In this sublayer shear stress is negligible to viscous shear stress hence the momentum equation becomes a linear equation. 〖du〗^+/〖dy〗^+ =1 Therefore, u^+= y^+ Buffer Layer: It ranges from 5≤ y^+ ≤30 . In this range both viscosity and inertial

The components of strain rate tensor, E, are calculated by: (12) Effective pressure is the normal stress between sediment grains and is defined as the buoyant weight of the sediments above a certain sediment particle: (13) where is the vertical distance between sediment particles and the water sediment interface, is specific weight of the water and is saturated specific weight of sediment. To obtain at first the interface must be identified in each time step. In the present model the

cells converts mechanical stimuli to biochemical signaling cascades, is involved in the homeostasis of numerous tissues. The mechanotransduction of oscillatory shear stress by bone resident cells has gained special attention because of its role in regulating bone formation, remodeling and disease. Mechanical forces, especially, fluid shear stress has been observed to induce several cellular responses in osteoblastic cells, including intracellular calcium influx, stress fiber formation, ATP, nitric