Mechanical Deformation in Materials

stress-strain curve to understand the nature of the material

In materials science, deformation is a change in the shape or size of an object due to an applied force. This can be a result of tensile (pulling) forces, compressive (pushing) forces, shear, bending or torsion (twisting). Deformation is often described as strain.

BEARING MANUFACTURING

This video best explains the mechanical engineering. It is actually the manufacturing of bearing. It shows all the mechanical machines used to manufacture a bearing. It help you to understand the mechanical design and mechanical engineering of the bearing.

Background of Mechanical Energy & Revolution

Background

• before the industrial revolution which began 200 years ago, people were torally dependent on human/animal labor

• life was simple, unsophisticated and the environment was relitively clean. as such energy requirement were met through food in-take.

Industrial Revolution

• invention of steam engine by james ex scotland brought industrial revolution in 1785. a first step toward industrialiazation revolution or beginning of mechanical age or age of machines.

• the advent of IC engine in 19th century gave further momontum to this trend.

• gradually, industrial revolution spread the whole world.

ENERGY AND HISTORY

Throughout the history of human race, major advances in civilization have been accompained by increase in the rate of energy consumption.

Energy consumption appears to be directly related to the:

• level of living standard of populance

• degree of industrialization of the country

Countries with abundant supplies of energy available to them have shown:

• high rate of industrial growth

• corresponding increase in the gross national product (GNP)

The availability of low cost energy have led to the following:

• inefficient utilization of the energy