PROPERTIES OF M E T A L S A N D THEIR USES

MECHANICAL ENGINEERING

Mechanical engineering is the

application of physical principles to the creation of useful devices, objects and machines.

Mechanical engineers use principles such as heat, force, and the conservation of mass

and energy to analyze static and dynamic physical systems, in contributing to the design

of things such as automobiles, aircraft, and other vehicles PROPERTIES OF M E T A L S A N D THEIR USES, heating and cooling systems,

household appliances, industrial equipment and machinery, weapons systems, etc.

Fundamental subjects of mechanical engineering include: dynamics, statics, strength

of materials, hydraulics, kinematics, and applied thermodynamics. Mechanical engineers

should understand and be able to apply concepts from the chemistry and electrical engineering fields.

Engineers in this PROPERTIES OF M E T A L S A N D THEIR USES field design, test, build, and operate machinery of all types; they

also work on a variety of manufactured goods and certain kinds of structures. The field is

divided into machinery, mechanisms, materials, hydraulics, and pneumatics; and heat as

applied to engines, work and energy, heating, ventilating, and air conditioning. The mechanical

engineer, therefore, must be trained PROPERTIES OF M E T A L S A N D THEIR USES in mechanics, hydraulics, and thermodynamics

and must know such subjects as metallurgy and machine design.

A mechanical engineer designs not only the machines that make products but the products

themselves, and must design for both economy and efficiency.

AUTOMOTIVE ENGINEERING

Automotive engineering is a branch of Vehicle engineering. It incorporates

elements of mechanical PROPERTIES OF M E T A L S A N D THEIR USES, electrical, electronic, software and safety engineering as applied

to the design, manufacture and operation of automobiles, buses and trucks and

engineering subsystems.

Automotive engineers are involved in almost every aspect of designing cars and

trucks. Broadly speaking automotive engineers are separated into three main streams:

product engineering, development engineering and manufacturing PROPERTIES OF M E T A L S A N D THEIR USES engineering.

- Product engineer (also called design engineer), that would design

components/systems (i.e brake engineer and battery engineer).

- Development engineer, that engineers the attributes of the automobile.

- Manufacturing engineer determines how to make it.

A Development Engineer is a job function within Automotive Engineering, in

which the development engineer PROPERTIES OF M E T A L S A N D THEIR USES has the responsibility for coordinating delivery of the

engineering attributes of a complete automobile (bus, car, truck, etc.).

APPLIED MECHANICS

Mechanics is a branch of physical science which considers the effect of forces

upon the motion or upon the conditions of material bodies.

Applied mechanics is a part of mechanics. It PROPERTIES OF M E T A L S A N D THEIR USES includes the laws of mechanics to be

applied to the motions of particles and of rigid bodies as used in problems of engineering.

The condition of rest is considered to be the limiting condition of motion.

The subject of applied mechanics may be divided into two parts statics and dynamics,

and PROPERTIES OF M E T A L S A N D THEIR USES dynamics may be further divided into kinematics and kinetics. It is statics

that treats bodies in equilibrium, and dynamics that treats the particles and bodies in motion.

Kinematics is the part of dynamics to treat the motion of particles and rigid bodies

without reference to the forces that produce or change PROPERTIES OF M E T A L S A N D THEIR USES the motion. Kinetics is the part of

dynamics to treat the motion of material bodies which are changed by the application of

forces.There are three common methods of analysis of problems: the graphic method, the

trigonometric method and the algebraic one.

PROPERTIES OF M E T A L S A N PROPERTIES OF M E T A L S A N D THEIR USES D THEIR USES

The selection of the proper metal or alloy for a given use is an important part of the

practice of metallurgy. Because iron and steel are used in larger quantities than any of the

other metals, it is common practice to divide materials into ferrous and nonferrous.

- Strength PROPERTIES OF M E T A L S A N D THEIR USES, ease of shaping and relatively low cost are of greatest importance for

major structural purposes. For these purposes steel is ideally suited. For automobile parts,

and wherever greater strength and toughness are required, more expensive special steels

are used.

- Metals light in weight - For making different machine parts, and in other PROPERTIES OF M E T A L S A N D THEIR USES applications

where strength must be combined with light weight, metals such as aluminum or

magnesium and their alloys are used.

- Softness. Ease in bending - For uses requiring softness and ease in bending, as in

cable-sheathing and where certain chemical properties are needed, lead and its alloys

may be employed.


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