This is the first video; Introduction of Stress of the 1st module under the subject Strength of Materials. This module provides a complete analysis of stress which comprises of six videos. There are a total of forty videos, each about an hour long to cover the entire subject of Strength of Materials. These videos are made available by the National Programme on Technology Enhanced Learning, a joint venture by Indian institutes of technology & Indian institutes of science.
This video will cover the below notes:
• Engineering mechanics is divided into 3 fundamental areas: Statics, Dynamics, & Mechanics of Material.
• In Statics & Dynamics – deformation characteristics are not covered.
• Mechanics of Material is also known as Strength of Material a.k.a. Mechanics of Deformable Bodies a.k.a. Mechanics of Solids.
• Objective: Physical systems in any engineering discipline composed of individual parts which give structural form – to know the behavior of the element against the external loads.
• Various loading types briefly explained. e.g.: bridge – water load, vehicular load, load of its own weight.
• Effects of external loads to building structure as whole & the individual parts & deform into non usable form with not serviceable condition.
• Whether structure in stable position withstanding all considered loads without undergoing excessive deformation.
• Subject to forces from the loads, individual parts failure may lead to failure of whole structure.
• Look into type of materials & sizing that do not contribute to added weight.
• Analyze individual parts to satisfy the strength requirement, satisfy the deformation requirement, and satisfy the stability requirement.
• Appropriate sizing is necessary to safely withstand imposed forces at an optimal cost. Example: a smaller size of a part can fulfill the requirements safely & cost less hence will be a better choice in terms of cost.
• We are interested in strength, deformation point & character of different kinds of forces which cause different types of stresses in the material.
• Deals with analytical determination of strength, deformation characteristics (stiffness) and stability of different members = Strength of Materials
• Interested in 3 characteristics (3Ss) of Strength of Materials
S = Strength
S = Stiffness
S = Stability
• History of this area of engineering study since 17th century by Galileo & Euler’s column buckling was without experimental evidence until 100 years later.
• French investigators who developed strength material aspects in to what it is today & several theories came up based on their research findings through theoretical & experimental evidence.
• Expected after finish all forty videos:
1. Understand classification of different kinds of forces that structural components are subjected.
2. Effects of different forces on such components & their solution techniques.
3. Different types of stresses & deformations that develop due to forces.
All the above will be analyzed systematically.
• Mainly confined to material useful in engineering application
• Approach:
1. Laws of Newtonian mechanics that govern the equilibrium of forces: theoretical aspects.
2. Essential to know the “mechanical” characteristics (behavior) of material with which the member is fabricated – based on experimental evidence & test results in lab.
Brain of the two: Newtonian mechanics & experimental evidence
• This course is divided into – logical development of concept: derive formula & application of concepts to practical problems. The latter is divided into numerical & algebraic problem groups.
• Numerical: example problems assigning specific values, use international units – meter(m) for length (L), kilogram (kg) for mass (M), & seconds (s) for time (T)
• Arrive at certain derived units which are Area, Velocity, Acceleration, & Force.
• Parameter called as stress & explanation of Newton, Pascal, Megapascal, Kilopascal, Gigapascal.
• Algebraic: arrive at certain expressions general in nature used for solving specific problems that have specific numerical value or parameters.
Other topics covered in this first video includes Body force, Center of gravity, Surface force, equilibrium, Intensity of the forces, symbols, & a summary of the video. Lastly, lecture questions are given at the end of the video for the viewers to try & the answers will be included in the next video in sequence. TUNE IN!
This video will cover the below notes:
• Engineering mechanics is divided into 3 fundamental areas: Statics, Dynamics, & Mechanics of Material.
• In Statics & Dynamics – deformation characteristics are not covered.
• Mechanics of Material is also known as Strength of Material a.k.a. Mechanics of Deformable Bodies a.k.a. Mechanics of Solids.
• Objective: Physical systems in any engineering discipline composed of individual parts which give structural form – to know the behavior of the element against the external loads.
• Various loading types briefly explained. e.g.: bridge – water load, vehicular load, load of its own weight.
• Effects of external loads to building structure as whole & the individual parts & deform into non usable form with not serviceable condition.
• Whether structure in stable position withstanding all considered loads without undergoing excessive deformation.
• Subject to forces from the loads, individual parts failure may lead to failure of whole structure.
• Look into type of materials & sizing that do not contribute to added weight.
• Analyze individual parts to satisfy the strength requirement, satisfy the deformation requirement, and satisfy the stability requirement.
• Appropriate sizing is necessary to safely withstand imposed forces at an optimal cost. Example: a smaller size of a part can fulfill the requirements safely & cost less hence will be a better choice in terms of cost.
• We are interested in strength, deformation point & character of different kinds of forces which cause different types of stresses in the material.
• Deals with analytical determination of strength, deformation characteristics (stiffness) and stability of different members = Strength of Materials
• Interested in 3 characteristics (3Ss) of Strength of Materials
S = Strength
S = Stiffness
S = Stability
• History of this area of engineering study since 17th century by Galileo & Euler’s column buckling was without experimental evidence until 100 years later.
• French investigators who developed strength material aspects in to what it is today & several theories came up based on their research findings through theoretical & experimental evidence.
• Expected after finish all forty videos:
1. Understand classification of different kinds of forces that structural components are subjected.
2. Effects of different forces on such components & their solution techniques.
3. Different types of stresses & deformations that develop due to forces.
All the above will be analyzed systematically.
• Mainly confined to material useful in engineering application
• Approach:
1. Laws of Newtonian mechanics that govern the equilibrium of forces: theoretical aspects.
2. Essential to know the “mechanical” characteristics (behavior) of material with which the member is fabricated – based on experimental evidence & test results in lab.
Brain of the two: Newtonian mechanics & experimental evidence
• This course is divided into – logical development of concept: derive formula & application of concepts to practical problems. The latter is divided into numerical & algebraic problem groups.
• Numerical: example problems assigning specific values, use international units – meter(m) for length (L), kilogram (kg) for mass (M), & seconds (s) for time (T)
• Arrive at certain derived units which are Area, Velocity, Acceleration, & Force.
• Parameter called as stress & explanation of Newton, Pascal, Megapascal, Kilopascal, Gigapascal.
• Algebraic: arrive at certain expressions general in nature used for solving specific problems that have specific numerical value or parameters.
Other topics covered in this first video includes Body force, Center of gravity, Surface force, equilibrium, Intensity of the forces, symbols, & a summary of the video. Lastly, lecture questions are given at the end of the video for the viewers to try & the answers will be included in the next video in sequence. TUNE IN!
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