When using Flat- Jointed model or Parallel bonded model to simulate brittle rock. How to calibrate the initial crack stress to the target value in UCS test? Which parameter affect the initial crack stress of the rock sample in UCS test?
Crack initiation stresses in bonded particle models (BPM) is a detailed subject. I would point you to the below report co-authored by my colleague Dr. Potyondy. This report looks at spalling with regard to grain type in BPM. It also contains great information regarding crack initiation and I think it will be helpful for your work.
Thank your for your kind information.