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Guest instructor: MHB (Farzine) Nasseri, Ph.D., P.Eng.

Overview: 

A difference should be made between what are commonly called rock failure mechanics and fracture mechanics. Rock failure mechanics generally refers to the global process of failure in a continuum sense by which a rock or rock mass suffers stable damage that impacts its capability to withstand a load. Rapid failure of a rock sample loaded slowly in tension or compression in a laboratory load frame or a sudden rock burst or roof collapse in a mine are some examples. On the other hand, fracture mechanics, sometimes called crack mechanics, refers to the distinct propagation of an individual crack or cracks that can propagate under various stress modes. This crack propagation is often cataclysmic in nature but can also occur slowly. Examples include the fracturing of a rock beam loaded in bending in the laboratory and hydraulic fracturing in which a single large fracture is made to propagate from an oil or gas well by the application of fluid pressure to increase its productivity.

Following topics will be covered in two sessions. 

Day 1:    Rock mechanics

  • Strength and deformational properties of intact isotropic and anisotropic rocks,
  • Uniaxial compressive strength of rocks
  • Deformational responses of rocks under triaxial compressive and true triaxial states,
  • Failure criteria for isotropic and anisotropic rock samples,
  • Hoek and Brown failure criteria,
  • Ramamurthy (IIT’s) failure criteria.

 Day 2:   Fracture mechanics: 

  • The Griffith and Irwin’s theories and the evolution of modern fracture mechanics,
  • Linear elastic fracture mechanics and fracture initiation theories,
  • Determination of stress intensity factor and fracture energy concepts,
  • Determination of fracture toughness under mode I, chevron cracked notched Brazilian disk< (CCNBD),
  • The effect of microstructures on fracture toughness determined under CCNBD method,
  • Determination of fracture process zone using acoustic emission techniques,
  • Application of rock fracture mechanics.

The course will be delivered online and includes handouts in electronic format.  This is a one (1) day course split over two (2) days, Wednesday 29th and Thursday 30th of June 2022; sessions will be 13:00  to 19:00 (GMT+1) on both days.

 

Date: 29-30 June 2022

 Time: 13:00-17:00 GMT+1

 Registration deadline: 16.June.2022 

Location: Online

Language: English

Duration: 8 hours (two 4-hour sessions)

 

 

Price: 300 GBP (+20% VAT for UK-based clients) 

 

 

ASC reserves the right to cancel the course if a minimum number of participants is not reached. Registered participants will be offered a refund.

Rock and Fracture Mechanics

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