ME621A |
Introduction to Solid Mechanics |
Credits: |
3L-0T-0L-0D (9 Credits) |
Course Content:
Mathematical Preliminaries: Vector and tensors calculus, Indicial notation. Strain: Definition of small strain, Strain-Displacement relations in 3D, Physical interpretation of strain components, Principal Strains. Stress and equilibrium: Stress components in 3D, Principal Stresses, Cauchy’s principle, stress equilibrium. Constitutive law, Navier’s equations, compatibility equations. Formulation of boundary value problems and solution methods: Plane Problems - plane stress, plane strain, anti-plane shear. Fourier transform methods. Superposition principle. Additional topics from: Examples - Torsion of prismatic shaft, Contact problems, Wedge problems, Dislocations and inclusions, Cracks, Think-film problems; Advanced transform methods - Complex variable techniques, Potential methods; Advanced ideas - Energy method, Numerical approaches, Finite elements, Eigenstrains, Micromechanics.
Lecturewise Breakup (based on 75min per lecture)
I. Introduction: (1 Lectures)
- Review of strength of Materials and its limitations.
II. Mathematical Preliminaries: (4 Lectures)
- Vector and tensor calculus.
- Indicial notation.
III. Strains: (1 Lectures)
- Definition of small strain, Strain-Displacement relations in 3D, Physical interpretation of strain components, Principal Strains.
IV. Stress and equilibrium: (4 Lectures)
- Stress components in 3D and their physical interpretations. [1 Lecture]
- Principal Stresses. [1 Lecture]
- Cauchy’s principle and derivations of stress equilibrium equations in stress components. [2 Lectures]
V. Constitutive law, Navier’s equations, compatibility: (4 Lectures)
- Constitutive law for general linear elastic solid, Discussions on isotropic, orthotropic and transversely isotropic solid.
- Navier’s equations.
- Stress and displacement approaches.
- Compatibility equations.
VI. Formulation of boundary value problems and solution methods: (15 Lectures)
- Formulation of boundary value problems. [1 Lecture]
- Plane Problems - plane stress, plane strain, anti-plane shear (also in axisymmetric coordinates). [2 Lectures]
- Examples of plane problems: Stress function approach, Series solutions. [6 Lectures]
- Fourier transform methods with examples. [3 Lectures]
- Superposition principle: Flamant’s solutions; Kelvin’s solution; Boussinesq’s solution. [3 Lectures]
VII. Additional topics - a few topics to be selected from below: (11-13 Lectures)
- Further examples: Torsion of prismatic shaft; Contact problems; Wedge problems; Dislocations and inclusions; Cracks; Thin-film problems.
- Further methods: Advanced transform methods; Complex variable techniques; Potential methods.
- Further ideas: Energy methods; Numerical approaches; Finite elements; Eigenstrains; Micromechanics.
References:
- Elasticity, J. R. Barber
- The Linearized Theory of Elasticity, W. L. Slaughter
- Continuum Mechanics for Engineers, G. T. Mase and G. E. Mase
- Theory of Elasticity, S. Timoshenko and J. N. Goodier
- Elasticity: Theory, Applications and Numerics, M. H. Sadd
- Applied Mechanics of Solids, A. Bower