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Mechanical Behavior

Mechanical Behavior

Why metals bend, get stronger, stretch, crack and creep: dislocations, slip, strengthening, tensile curves, fracture, fatigue and creep, each as a lab you move.

Mechanical Behavior
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New to Mechanics? Read these first.

LabDislocations & Burgers Vectors

Drag an edge dislocation through a crystal, draw Burgers circuits for edge, screw and mixed dislocations, and see the…

LabSchmid Factor & Slip Systems

Find the Schmid factor of every slip system in FCC, BCC and HCP crystals, pick a tensile axis on the stereographic…

LabReading a Tensile Curve

Watch a tensile specimen stretch, neck and break while its curve draws; read E, 0.2% offset yield, UTS and elongation;…

All topics

Dislocations & slip2 pages
LabDislocations & Burgers VectorsDrag an edge dislocation through a crystal, draw Burgers circuits for edge, screw and mixed dislocations, and…Foundation · 15 minLabSchmid Factor & Slip SystemsFind the Schmid factor of every slip system in FCC, BCC and HCP crystals, pick a tensile axis on the…Foundation · 15 min
Strengthening1 page
LabStrengthening MechanismsMove grain size, particle radius, solute content and dislocation density and watch the yield strength of Cu,…Foundation · 15 min
Elasticity & tensile testing2 pages
LabReading a Tensile CurveWatch a tensile specimen stretch, neck and break while its curve draws; read E, 0.2% offset yield, UTS and…Foundation · 15 minLabElastic AnisotropyDrag a 3D surface of Young's modulus for Cu, Ni, Fe, W, Si, Ti, Mg and Zn crystals, read E in any plane, and…Advanced · 12 min
Fracture & fatigue2 pages
LabFracture Toughness & KWatch a crack run when the stress intensity K reaches KIc, with the Griffith energy balance, crack-tip…Foundation · 15 minLabFatigue & S-N CurvesMove the load and watch fatigue life change: S-N curves with Basquin's law, mean stress on a Haigh diagram,…Foundation · 15 min
Creep1 page
LabCreep & Deformation MapsA live creep curve, a Frost-Ashby deformation mechanism map for Ni and Al with Coble, Nabarro-Herring and…Advanced · 15 min

Other chapters: TEM · EBSD · APT · Structure & Transformations · Contact Mechanics · In-situ Testing.