Engineering Mechanics and Strength of materials

Strength of materials - ENGINEERING MECHANICS
It is the branch of Physics which deals with the effect of external force on the bodies at rest or Uniform motion along a straight line.

1. Department of Collegiate and Technical Education ENGINEERING MECHANICS & STRENGTH of MATERIALS (15CE31T-III Sem) Introduction to Mechanics(Session I) Prepared by Major Anil Kumar. G PRINCIPAL Government Polytechnic Sira Civil Engineering – 15CE31T

2. STRENGTH OF MATERIAL It is the capacity of the material to resist ( take up) the external load (force) before failure (Rapture) ENGINEERING MECHANICS It is the branch of Physics which deals with the effect of external force on the bodies at rest or Uniform motion along a straight line. Civil Engineering – 15CE31T

3. Civil Engineering – 15CE31T

4. FORCE: It is an external agent which will changes are tends to change the state of rest or uniform motion of body along a straight line. It is a vector quantity. Characteristics of Force: Being a vector quantity force is having following 4 characteristics. Magnitude - Amount of force F= 5N Direction - θ inclination of line of action of force with respect to horizontal direction. Civil Engineering – 15CE31T

5. Point of Application- O is the point at which force is acting on the body . Nature of the force or sense and Line of action – It is the line along which force is acting OA , acting towards from the body (Pull) or acting away from the body represented by an Arrow head (►). Civil Engineering – 15CE31T

6. Effects of Force It may change state of rest or motion of a body. It may record or accelerates motion of body. It may develop internal stress in the body. It may keep the body in equilibrium. System of Forces: If two are more forces acting simultaneously on body they are called to form a system of forces. Civil Engineering – 15CE31T

7. TYPES OF FORCES SYSTEMS: Co-planar Forces : Forces lying in the same plane Collinear Forces : Forces acting along a same straight line . Civil Engineering – 15CE32T F 1 F 2 F 3

8. Concurrent Forces : Forces acting at point simultaneously. Co planar Concurrent Forces : Forces lying in the same plane and acting at a point. Co planar non-Concurrent forces : Forces lying in the same plane and acting at different Points. Civil Engineering – 15CE31T

9. Non-Co planar Concurrent forces : Forces lying in the different planes and acting at Point . Non-Co planar Non-Concurrent forces : Forces lying in the different plane and acting at Different point . PRINCIPAL OF TRANSMISSIBILITY OF FORCES : It States, “If a force acts at any point a rigid body, it may also be considered to act at any other point on its line of action . Civil Engineering – 15CE31T

10. THANK YOU Civil Engineering – 15CE31T