Use of Mohr's Circle in Geotechnical Engineering | Shear Strength of Soil

In this lecture, we discuss the application of Mohr's Circle in Geotechnical Engineering for understanding the Shear Strength of Soil. Building upon the concepts of stress transformation and Mohr's Circle, this lecture explains how principal stresses, failure planes, and soil strength parameters are related through graphical analysis. 📌 Previous Video (Part 1): 2D Stress Analysis | Mohr's Circle and Stress Transformation    • 2D Stress Analysis | Mohr's Circle and Str...   The lecture covers: ✔ Shear strength of soil ✔ Mohr-Coulomb failure criterion ✔ Principal stresses at failure ✔ Failure plane orientation ✔ Effective and total stress concepts ✔ Determination of cohesion (c) and angle of shearing resistance (ϕ) ✔ Application of Mohr's Circle in soil mechanics ✔ Direct shear and triaxial test concepts ✔ Numerical problem solving using Mohr's Circle This topic is important for students of: 🔹 Civil Engineering 🔹 Geotechnical Engineering 🔹 Structural Engineering 🔹 Engineering Geology The lecture is also useful for preparation of: 📚 GATE Civil Engineering 📚 ESE (IES) 📚 SSC JE 📚 State Engineering Service Examinations 📚 University Examinations 🎯 By the end of this lecture, you will be able to use Mohr's Circle to determine soil shear strength parameters, identify failure planes, and solve geotechnical engineering problems related to soil failure. If you find this lecture helpful, please Like, Share, and Subscribe to the channel for more content on Soil Mechanics, Foundation Engineering, Strength of Materials, Structural Analysis, Theory of Elasticity, Structural Dynamics, Finite Element Method, and Engineering Mechanics. #MohrsCircle #SoilMechanics #ShearStrengthOfSoil #GeotechnicalEngineering #MohrCoulombTheory #DirectShearTest #TriaxialTest #PrincipalStress #FailurePlane #CivilEngineering #GateCivil #SSCJE #engineeringeducation ⏱️ Chapters 00:00 Introduction & Scope of the Lecture 00:37 Stress Convention in Geotechnical Engineering 03:57 Stress Transformation on an Inclined Plane 05:06 Stress Transformation Equations for Soil Mechanics 08:53 Construction of Mohr's Circle in Geotechnical Engineering 13:39 Double-Angle Relationship in Mohr's Circle 16:07 Major and Minor Principal Stresses 22:01 Maximum Shear Stress and Shear Planes 25:01 Pole Method and Origin of Planes 32:38 Shear Failure Mechanism in Soil 35:59 Mohr-Coulomb Failure Criterion 40:01 Stress State in Soil Mass and Failure Envelope 43:28 Loading Effect and Growth of Mohr's Circle 45:27 Determination of Failure Plane using Pole Method 49:07 Numerical Example 1: Direct Shear Test 54:48 Numerical Example 2: Triaxial Compression Test