# Mechanical Devices

## Engineering materials: Brittle Fracture Mechanics and Considerations

One of most important concepts in Material engineering is fracture. Brittle fracture is key concern in Industrial Damage Mechanism and describe by sudden fracture in material under stress. As rule all materials of construction are at risk to damage and efforts have been made to prevent failures in tool caused by fracture mechanism. We will define and discuss brittle material

## Engineering Materials – Atomic Structure Introduction

All material things are made from atoms. There are different types of atom called elements. Well, as you know, an atom consists of electrons protons and neutrons. The number of electrons in outer shell gives us number of atom. Similarly, number of protons and neutrons are associated with atomic number and mass number of atoms. In this article, we will

## Engineering Materials – Desirable Bearing Materials Properties

Bearings play an important role in application which is used to support another rotary motion. It is used to give free rotational motion to shaft. It reduces friction and heat. Here, we learn about many different types of materials bearings can be made of. Properties of Bearing Materials Bearing is mechanical element which locates two machine parts relative to each

## Fluid Mechanics – Reynolds Number

In fluid mechanics, Reynolds Number (Re) is most important dimensionless number. Reynolds Number is used to determine whether fluid flow is laminar or turbulent. It is one of main controlling parameters in all viscous flow where numerical model is selected according to pre-calculated Reynolds Number. This article gives you detailed introduction into topic of Reynolds Number and its application. What

## Fluid Mechanics – Friction Factor and Darcy-Weisbach Equation

In fluid mechanics, Darcy-Weisbach equation relates pressure-loss to average flow velocity. It contains dimensionless friction factor known as Darcy-Friction equation. This is also called Darcy-Weisbach friction factor which simply friction factor. Here, fluid is assumed to be incompressible in nature. Darcy-Weisbach equation However, Pressure loss in pipe flow is calculated using equation known as Darcy-Weisbach equation. This Darcy-Weisbach equation is

## Fluid Mechanics – Gas Laws

Gas laws are first equation of state that shows relationship temperatures and pressures of gases. Gas Laws explain about changes in behavior of gas when certain conditions are applied. Gas laws deal with how gases behave with respect to volume, pressure, temperature and amount. Following are some of important gas laws. Boyle’s Law Charles’ Law Gay-Lussac’s Law or Amontons’ Law

## Viscosity in Fluid Mechanics

Viscosity is friction of fluids and it also describes internal resistance of flow of fluid. In this article, we are going to discuss what dynamic viscosity and kinematic viscosity are, their definitions, applications of dynamic and kinematic viscosity and finally differences between kinematic viscosity and dynamic viscosity. What is Viscosity? Viscosity can be defined as resistance of fluid to flow.

## Bernoulli’s principle from Equation in Fluid Mechanics

In fluid dynamics, Bernoulli’s principle state that an increase in fluid speed occurs with pressure decrease or decrease in fluids potential energy. This principle can be applied to many types of fluid flow as result in various forms of Bernoulli’s equation. So far, we have discussed fundamental aspects of Bernoulli equation. This article is about Bernoulli’s principle and equation in

## Brake System Types, Functions, Types of Brakes in automobile

Brake system is most important parts of a vehicle. This braking system is necessary in an automobile for stopping vehicle. Brakes are applied on wheels to stop or to slow down the vehicle by converting its kinetic energy into heat. No matter what kind of vehicle people use, an efficient braking system will always use for safety. In this article,

## Difference between Diesel and Petrol Engine

Petrol and diesel engines are two common things used internal engines. Petrol and diesel engine is done on basis of fuel used by these engines. Engine which uses petrol is called petrol engine but engine that uses diesel is called diesel engine. In this article, we will discuss about differences between petrol and diesel engine. There is lot of variation