SASCOM Courses - Composites delamination: modelling and characterisation

DAY 1: January, 25th, 2022

Lecture 1:

  • Introduction to delamination
  • Modelling interface cracks:
    • crack propagation modes
    • traction-separation behaviour
    • initiation, propagation, cohesive length
    • limit case: linear elastic fracture mechanics

Lecture 2:

  • Linear elastic fracture mechanics:
    • hypotheses and derivation
    • strain energy release rate and dissipated energy
    • stable and unstable crack propagation
  • Illustration: modelling the Double Cantilever Beam (DCB) test

Optional homework:

post-treatment of DCB test data according to ASTM standard


DAY 2: February, 1st, 2022

Lecture 3: 

  • Characterisation tests for composites delamination
    • DCB test standard (homework correction)
    • Mode II standards: 3- and 4- point End Notched Flexure (ENF)
    • Mixed mode standards: Mixed Mode Bending (MMB)
    • limitations

Lecture 4:

  • Characterisation tests for adhesives debonding
    • Climbing Drum Peel (CDP) test for sandwich debonding
    • Peel tests
    • Other testing configurations

 

About the Speaker

Federica Daghia is Associate Professor (Maître de Conférences HDR) at the École Normale Supérieure Paris-Saclay, in France. She earned her PhD in 2008 from the University of Bologna, in Italy, and her Habilitation in 2016 from École Normale Supérieure de Cachan, in France. Between 2016 and 2021, she was member of the French National Committee for Scientific Research (CoNRS) – Mechanics Section. Since 2016, she is Secretary of the French Society for Composites Materials (AMAC).

Her research interest involve the physics-based modeling of damage and failure of composite and architectured materials, from experimental characterisation to numerical simulation.

By Dr. Federica Daghia

  • École Normale Supérieure Paris-Saclay, France

Note: the registration is closed