Course11210231953 lectures
Mechanical Behavior of Polymers and Composites
Prof. Naresh V Datla · IIT Delhi
About
The course introduces to the various engineering aspects of polymers and composites. It discusses the unique mechanical properties that these materials offer over metals and how they are related to the structure of the materials. It teaches the mechanics of these materials that include the viscoelastic analysis of polymers and classical lamination theory for composite laminates. It also describes the failure behavior and design aspects of these materials. The course prepares a student to work on research and engineering problems related to polymers and composites.
Intended audience: UGs and PGs from Mechanical, Materials, Aerospace, Automotive, Civil, and other related engineering branches. Working professionals associated with polymers and composites.
Prerequisites: UG courses in Engineering Mechanics and Solid Mechanics
Lectures
Week 1
- Introduction to polymers
- Polymer structure
- Polymer classification
- Polymer length, packing and tacticity
- Glass transition temperature
Week 2
- 2A Temperature effects, glassy regime
- 2B Viscoelastic, rubbery, viscous, decomposition
- 2C Relaxation and creep tests
- 2D Failure of polymers
- 2E Heaviside, Dirac delta, Laplace
Week 3
- 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
Week 4
- 4A Boltzman superposition principle
- 4B Alfrey’s correspondence principle
- 4C Analysis of viscoelastic bars
- 4D Analysis of viscoelastic beams
Week 5
- 5A Dynamic mechanical analysis (DMA)
- 5B Dynamic mechanical thermal analysis (DMTA)
- 5C Time temperature superposition principle (TTSP)
- 5D Plastic design consideration and practices
Week 6
- 6A What are composites?
- 6B Composite materials and types
- 6C Composite advantages and applications
- 6D Fabrication and other aspects of composites
Week 7
- 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
Week 8
- 8A Plane stress: Specially orthotropic material
- 8B Plane stress: Generally orthotropic material
- 8C Lamina engineering constants
- 8D Lamina hygrothermal effects
- 8E Lamina fundamental strengths
Week 9
- 9A Lamina failure criteria
- 9B Tsai-Hill and Hoffman failure criteria
- 9C Micromechanics: Assumptions, RVE
- 9D Micromechanics: Stiffness prediction
Week 10
- 10A Micromechanics: Stiffness and strength
- 10B Macromechanics of laminate
- 10C Classical laminate theory
- 10D Classical laminate theory - II
Week 11
- 11A Symmetric laminates, orthotropic laminates
- 11B Angle-ply, cross-ply and quasi-isotropic laminates
- 11C Hygrothermal stresses in laminates
Week 12
Syllabus and materials
At NPTEL, as the course publishes them.
Credits and licence
- Institution
- IIT Delhi
- Department
- Mechanical Engineering
- Teacher
- Prof. Naresh V Datla
- Level
- Undergraduate
- Language
- English
- Subjects
- Engineering
- Source
- NPTEL
- Licence
- CC BY-NC-SA, as NPTEL states it. Non-commercial use only. NPTEL's terms
- Attribution
- NPTEL states: "Distributed under Creative Commons Attribution-ShareAlike / CC BY - NC - SA", beside a BY-NC-SA badge.
- Who can watch
- NPTEL gives no rating. Invisible Network shows it to Tweens profiles and older, judged from what the source says about it. How courses are placed