PPT: Mechanical Properties of Materials | Strength of Materials (SOM) - Mechanical Engineering PDF Download

 Page 1


INTRODUCTION:
? The practical application of engineering materials
in manufacturing engineering depends upon a thorough
knowledge of their particular properties under a wide
range of conditions.
? The term ”p roperty ” is a qualitative or quantitative
measure of response of materials to externally imposed
conditions like forces and temperatures.
? However,the range of properties found in different
classes of materials is very large.
Page 2


INTRODUCTION:
? The practical application of engineering materials
in manufacturing engineering depends upon a thorough
knowledge of their particular properties under a wide
range of conditions.
? The term ”p roperty ” is a qualitative or quantitative
measure of response of materials to externally imposed
conditions like forces and temperatures.
? However,the range of properties found in different
classes of materials is very large.
Classification of material property:
Page 3


INTRODUCTION:
? The practical application of engineering materials
in manufacturing engineering depends upon a thorough
knowledge of their particular properties under a wide
range of conditions.
? The term ”p roperty ” is a qualitative or quantitative
measure of response of materials to externally imposed
conditions like forces and temperatures.
? However,the range of properties found in different
classes of materials is very large.
Classification of material property:
MECHANICAL  PROPERTIES:
? The properties of material that determine its behaviour
under applied forces are known as mechanical properties.
? They are usually related to the elastic and plastic
behaviour of the material.
? These properties are expressed as functions of stress-
strain,etc.
? A sound knowledge of mechanical properties of materials
provides the basis for predicting behaviour of materials
under different load conditions and designing the
components out of them.
Page 4


INTRODUCTION:
? The practical application of engineering materials
in manufacturing engineering depends upon a thorough
knowledge of their particular properties under a wide
range of conditions.
? The term ”p roperty ” is a qualitative or quantitative
measure of response of materials to externally imposed
conditions like forces and temperatures.
? However,the range of properties found in different
classes of materials is very large.
Classification of material property:
MECHANICAL  PROPERTIES:
? The properties of material that determine its behaviour
under applied forces are known as mechanical properties.
? They are usually related to the elastic and plastic
behaviour of the material.
? These properties are expressed as functions of stress-
strain,etc.
? A sound knowledge of mechanical properties of materials
provides the basis for predicting behaviour of materials
under different load conditions and designing the
components out of them.
STRESS AND STRAIN
? Experience shows that any material subjected to a load 
may either deform, yield or break, depending upon the 
? The Magnitude of load
? Nature of the material
? Cross sectional dime.
Page 5


INTRODUCTION:
? The practical application of engineering materials
in manufacturing engineering depends upon a thorough
knowledge of their particular properties under a wide
range of conditions.
? The term ”p roperty ” is a qualitative or quantitative
measure of response of materials to externally imposed
conditions like forces and temperatures.
? However,the range of properties found in different
classes of materials is very large.
Classification of material property:
MECHANICAL  PROPERTIES:
? The properties of material that determine its behaviour
under applied forces are known as mechanical properties.
? They are usually related to the elastic and plastic
behaviour of the material.
? These properties are expressed as functions of stress-
strain,etc.
? A sound knowledge of mechanical properties of materials
provides the basis for predicting behaviour of materials
under different load conditions and designing the
components out of them.
STRESS AND STRAIN
? Experience shows that any material subjected to a load 
may either deform, yield or break, depending upon the 
? The Magnitude of load
? Nature of the material
? Cross sectional dime.
CONTI..
? The sum total of all the elementary interatomic forces or
internal resistances which the material is called upon to
exert to counteract the applied load is called stress.
? Mathematically, the stress is expressed as force divided
by cross-sectional area.