Ελληνικά

Experimental Srength of Materials

Course Description:

A.

• Reminders from the Mechanics of Deformable Bodies. Elements from the Theory of Elasticity: Stress and strain as tensors, strain energy density.

• Fracture and Failure of Materials: The theory of strain energy density (Mises), the theory of maximum shear stress (Tresca), the theory of internal friction (Mohr-Coulomb).

• Elements from the Theory of Fracture Mechanics: Stress concentration and stress intensity, Stress fields around geometrical discontinuities. Circular holes. Notches. Cracks. Griffith’s theory. Energy considerations. Crack Opening Displacement (COD). The plastic zone around cracks.

• Static Loading: Tension, Torsion, Shear, Compression, Buckling, Bending, Hardness.

• The Influence of Time: Elements from the Theory of Rheology (Creep, Relaxation). Fatigue. Impact loading.

B.

• The role of the experiment in Strength of Materials: Design and realization of an experiment. Experimental data acquisition, storage and processing. Report writing.

• Experimental study on the mechanical behaviour and failure of materials:

  1. Tension of metallic materials.

  2. Compression and buckling of metals and concrete.

  3. Tri-axial loading of concrete.

  4. Three and four poing bending of concrete beams.

  5. Metal hardness measurements.

  6. Torsion of metallic bars.

  7. Creep and relaxation.

  8. Non-destructive testing using ultrasounds.

  9. Impact, fatigue.

  10. Fracture due to geometric discontinuities (hole, crack).