Learn · Mechanical Behavior of Polymers and Composites
Lecture 30 of 53Week 7
7B Symmetry in stress, strain and stiffness matrix
Prof. Naresh V Datla · IIT Delhi
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- Mechanical Behavior of Polymers and Composites, IIT Delhi (at NPTEL)
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All the lectures
- Introduction to polymers
- Polymer structure
- Polymer classification
- Polymer length, packing and tacticity
- Glass transition temperature
- 2A Temperature effects, glassy regime
- 2B Viscoelastic, rubbery, viscous, decomposition
- 2C Relaxation and creep tests
- 2D Failure of polymers
- 2E Heaviside, Dirac delta, Laplace
- 3A Introduction to linear viscoelasticity
- 3B Phenomenological models for linear viscoelasticity
- 3C Maxwell model
- 3D Kelvin model
- 3E Three and four parameter models
- 3F Generalized Maxwell and Kelvin models
- 4A Boltzman superposition principle
- 4B Alfrey’s correspondence principle
- 4C Analysis of viscoelastic bars
- 4D Analysis of viscoelastic beams
- 5A Dynamic mechanical analysis (DMA)
- 5B Dynamic mechanical thermal analysis (DMTA)
- 5C Time temperature superposition principle (TTSP)
- 5D Plastic design consideration and practices
- 6A What are composites?
- 6B Composite materials and types
- 6C Composite advantages and applications
- 6D Fabrication and other aspects of composites
- 7A 3D stress and strain components
- 7B Symmetry in stress, strain and stiffness matrix
- 7C Monoclinic, orthotropic and isotropic materials
- 7D 3D stress strain relation for orthotropic material
- 8A Plane stress: Specially orthotropic material
- 8B Plane stress: Generally orthotropic material
- 8C Lamina engineering constants
- 8D Lamina hygrothermal effects
- 8E Lamina fundamental strengths
- 9A Lamina failure criteria
- 9B Tsai-Hill and Hoffman failure criteria
- 9C Micromechanics: Assumptions, RVE
- 9D Micromechanics: Stiffness prediction
- 10A Micromechanics: Stiffness and strength
- 10B Macromechanics of laminate
- 10C Classical laminate theory
- 10D Classical laminate theory - II
- 11A Symmetric laminates, orthotropic laminates
- 11B Angle-ply, cross-ply and quasi-isotropic laminates
- 11C Hygrothermal stresses in laminates
- 11D Laminate failure
- 12A Design practices with laminates
- 12B Sandwich structures
- 12C Composites testing
- 12D Joining of composites