JNTUK R20 B.Tech Civil 2-2 Strength of Materials – II Material/ Notes PDF Download: Our meticulously curated material covers all essential aspects of this subject, ensuring a thorough understanding for students. With a focus on key objectives, our material aims to equip students with concepts of principal stresses and strains in beams, including stress analysis on inclined planes. We delve into the theories of material failure, providing insights into different failure mechanisms. Additionally, our material imparts knowledge of torsion, enabling students to calculate power transmission in shafts and springs and design cross-sections under varying loads. Download the JNTUK R20 B.Tech Civil 2-2 Strength of Materials – II Material PDF from the given below Links.
JNTUK R20 B.Tech Civil 2-2 Strength of Materials – II Material – Units
| No. Of Units | Name of the Unit |
| Unit – 1 | Principal Stresses and Strains And Theories of Failures, Theories of Failures |
| Unit – 2 | Torsion of Circular Shafts and Springs, |
| Unit – 3 | Columns and Struts |
| Unit – 4 | Direct and Bending Stresses |
| Unit – 5 | Unsymmetrical Bending and Shear Centre Un-symmetrical Bending, Shear Centre |
Unit 1 Syllabus PDF Download | JNTUK R20 B.Tech Civil 2-2 Strength of Materials – II Material
Principal Stresses and Strains And Theories of Failures: Introduction – Stresses on an inclined section of a bar under axial loading – compound stresses – Normal and tangential stresses on an inclined plane for biaxial stresses – Two perpendicular normal stresses accompanied by a state of simple shear – Mohr’s circle of stresses – Principal stresses and strains – Analytical and graphical solutions.
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Theories of Failures: Introduction – Various Theories of failures like Maximum Principal stress theory – Maximum Principal strain theory – Maximum shear stress theory – Maximum strain energy theory – Maximum shear strain energy theory.
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Unit 2 Syllabus PDF Download | JNTUK R20 B.Tech Civil 2-2 Strength of Materials – II Material
Torsion of Circular Shafts and Springs: Theory of pure torsion – Derivation of Torsion equations: T/J = q/r = Nϕ/L – Assumptions made in the theory of pure torsion – Torsional moment of resistance – Polar section modulus – Power transmitted by shafts – Combined bending and torsion and end thrust – Design of shafts according to theories of failure.
Springs: Introduction – Types of springs – deflection of close and open coiled helical springs under axial pull and axial couple – springs in series and parallel.
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Unit 3 Syllabus PDF Download | JNTUK R20 B.Tech Civil 2-2 Strength of Materials – II Material
Columns and Struts: Introduction – Types of columns – Short, medium and long columns – Axially loaded compression members – Crushing load – Euler’s theorem for long columns- assumptions- derivation of Euler’s critical load formulae for various end conditions – Equivalent length of a column – slenderness ratio – Euler’s critical stress – Limitations of Euler’s theory – Rankine – Gordon formula – Long columns subjected to eccentric loading – Secant formula – Empirical formulae – Straight line formula – Prof. Perry’s formula.
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Unit 4 Syllabus PDF Download | JNTUK R20 B.Tech Civil 2-2 Strength of Materials – II Material
Direct and Bending Stresses: Stresses under the combined action of direct loading and B.M. Core of a section – determination of stresses in the case of chimneys, retaining walls and dams – conditions for stability – stresses due to direct loading and B.M. about both axis.
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Unit 5 Syllabus PDF Download | JNTUK R20 B.Tech Civil 2-2 Strength of Materials – II Material
Unsymmetrical Bending and Shear Centre Un-symmetrical Bending: Introduction – Centroidal principal axes of section – Graphical method for locating principal axes – Moments of inertia referred to any set of rectangular axes – Stresses in beams subjected to unsymmetrical bending – Principal axes – Resolution of bending moment into two rectangular axes through the centroid – Location of neutral axis Deflection of beams under unsymmetrical bending.
Shear Centre: Introduction Shear centre for symmetrical and unsymmetrical sections (channel, I, T and L sections)
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JNTUK R20 B.Tech Civil 2-2 Strength of Materials – II Notes – Outcomes
- Students will grasp fundamental concepts related to principal stresses arising in structural members under various loading conditions and learn to design appropriate sections accordingly.
- They will gain proficiency in analyzing stresses in diverse engineering components such as shafts, springs, columns, and struts when subjected to different loading scenarios.
- By comprehending stress distribution and its effects on different materials and structures, students will be equipped to make informed decisions in designing and optimizing structural elements for optimal performance and safety across various engineering applications.
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