Chapter 1 Analysis of Stress
BAA1133
Mechanics of Materials
ANALYSIS OF STRESS
Lectured by:
MR. KHAIRUL ANUAR SHAHID
FACULTY OF CIVIL ENGINEERING & EARTH RESOURCES
ROOM NO: C 331
Chapter 1 : Lesson Outcomes
• Identify and apply the statics principles or equilibrium equations. • Isolated the rigid body and draw the free body diagram.
• Identify and explain the concepts of stresses.
• Apply the concepts of stresses in calculating the normal and shear stress of body.
• Analyze the average stress acting over the bar’s crosssectional area.
• Describe the single and double shear stresses thus calculate the average shear stress.
• Calculate the stress on oblique plane of body under loading conditions. • Calculate the allowable stress by applying the safety factors.
Introduction
• Mechanics of materials is a study of the relationship between the external loads on a body and the intensity of the internal loads within the body.
• This subject also involves the deformations and stability of a body when subjected to external forces.
External load
Internal load
Equilibrium of a
Deformable Body
- Identify and apply the statics principles or equilibrium equations. - Isolated the rigid body and draw the free body diagram.
External Loads
Surface Forces caused by direct contact of other body’s surface.
Body Forces other body exerts a force without direct contact.
Concentrated Forces acts at a point.
Any load over a relatively small area compared with the size of the loaded member .
Distributed Load resultant forces having a magnitude equal to the area under the load diagram, and having a location that passes through the centroid of this area.
Support Reaction
1. Surface forces develop at the supports or point of contact between bodies are called reactions.
2. If the support prevent translation in a give direction, a force must be developed on the member in the same direction. Likewise if rotation is prevented a moment must be
Mechanics of Materials
ANALYSIS OF STRESS
Lectured by:
MR. KHAIRUL ANUAR SHAHID
FACULTY OF CIVIL ENGINEERING & EARTH RESOURCES
ROOM NO: C 331
Chapter 1 : Lesson Outcomes
• Identify and apply the statics principles or equilibrium equations. • Isolated the rigid body and draw the free body diagram.
• Identify and explain the concepts of stresses.
• Apply the concepts of stresses in calculating the normal and shear stress of body.
• Analyze the average stress acting over the bar’s crosssectional area.
• Describe the single and double shear stresses thus calculate the average shear stress.
• Calculate the stress on oblique plane of body under loading conditions. • Calculate the allowable stress by applying the safety factors.
Introduction
• Mechanics of materials is a study of the relationship between the external loads on a body and the intensity of the internal loads within the body.
• This subject also involves the deformations and stability of a body when subjected to external forces.
External load
Internal load
Equilibrium of a
Deformable Body
- Identify and apply the statics principles or equilibrium equations. - Isolated the rigid body and draw the free body diagram.
External Loads
Surface Forces caused by direct contact of other body’s surface.
Body Forces other body exerts a force without direct contact.
Concentrated Forces acts at a point.
Any load over a relatively small area compared with the size of the loaded member .
Distributed Load resultant forces having a magnitude equal to the area under the load diagram, and having a location that passes through the centroid of this area.
Support Reaction
1. Surface forces develop at the supports or point of contact between bodies are called reactions.
2. If the support prevent translation in a give direction, a force must be developed on the member in the same direction. Likewise if rotation is prevented a moment must be