Mechanical Behavior of Materials, Part 1: Linear Elastic Behavior (edX)

The 3.032x series provides an introduction to the mechanical behavior of materials, from both the continuum and atomistic points of view. At the continuum level, we learn how forces and displacements translate into stress and strain distributions within the material. At the atomistic level, we learn the mechanisms that control the mechanical properties of materials. Examples are drawn from metals, ceramics, glasses, polymers, biomaterials, composites and cellular materials.

Part 1 covers stress-strain behavior, topics in linear elasticity and the atomic basis for linear elasticity, and composite materials.

Part 2 covers stress transformations, beam bending, column buckling, and cellular materials.

Part 3 covers viscoelasticity (behavior intermediate to that of an elastic solid and that of a viscous fluid), plasticity (permanent deformation), creep in crystalline materials (time dependent behavior), brittle fracture (rapid crack propagation) and fatigue (failure due to repeated loading of a material).

What you'll learn:

• The behavior of linear elastic materials
• The atomic basis for linear elasticity
• How to solve mechanics problems relating to stress, strain, and strain energy

Syllabus

Week 1: Normal and shear stress Normal and shear strain Hooke's law for isotropic materials
Week 2: 3D stress states Stress strain curves for engineering materials Strain energy
Week 3: Anisotropic materials and symmetry Composite materials
Week 4: Bonding between atoms; energetic basis for linear elasticity; Thermal strain; origins of thermal strain Rubber elasticity: entropic basis for non-linear elasticity
Week 5: Final Quiz