A method for constructing a rock crushing damage model under impact loading and its application
By introducing a correction factor related to the crack growth rate into the rock damage model and combining uniaxial and triaxial tests, a tension damage model under direct impact loading was constructed. This solved the problem of insufficient accuracy and reliability of existing models in rock damage prediction and achieved accurate prediction of rock damage process and strength.
Patent Information
- Application Number
- CN202411381491.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2044-09-30
AI Technical Summary
Existing rock damage models lack accuracy and reliability in predicting the macroscopic damage evolution and strength of rocks under direct impact loading, and it is difficult to reveal the quantitative change laws of rocks under direct impact loading and the key factors affecting the damage process and strength of rocks.
The tensile damage model under quasi-static loading is modified by introducing a correction factor related to the crack growth rate. Combining uniaxial and triaxial tests with CCNBD experiments, a tensile damage model under direct impact loading is constructed, including polynomial functions and stress intensity factor values. Numerical calculation software is used to fit key parameters and a dynamic tensile damage evolution model is constructed.
The accuracy and reliability of the rock damage model in predicting the strength and macro-damage evolution of rock under direct impact loading have been significantly improved, and the key factors of rock damage process and strength have been revealed more accurately.