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Damage constitutive model and strength criterion of cemented paste backfill based on layered effect considerations
- Source :
- Journal of Materials Research and Technology, Vol 9, Iss 3, Pp 6073-6084 (2020)
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- The concepts of initial damage, loaded damage, and total damage were introduced for cemented paste backfills (CPBs) with stratified structures. Based on these, the damage evolution model, damage constitutive model, and strength criterion of CPB with stratified structures were formulated based on damage theory and the total differential rule. Finally, compression experiments and numerical simulations of CPBs were conducted with three-dimensional particle flow code with the layer numbers of 0, 1, 2, and 3, a solid content of 75% and a cement–sand ratio of 1:4. The theoretical curves of the damage constitutive model and strength criterion of the layered CPB closely matched the curves generated based on experimental tests and numerical simulations. This finding verified the correctness of the model. The initial increase of the damage fits closely to a quadratic polynomial as a function of the layer number, the total damage rate first increased and then decreased, while the maximum of the total damage rate increased.
- Subjects :
- lcsh:TN1-997
Materials science
Constitutive equation
Metals and Alloys
Initial damage
Numerical simulation
Strength criterion
Quadratic function
Function (mathematics)
Compression (physics)
Surfaces, Coatings and Films
Biomaterials
Layered effect
Ceramics and Composites
Particle flow
Composite material
Solid content
Damage constitutive model
lcsh:Mining engineering. Metallurgy
Subjects
Details
- ISSN :
- 22387854
- Volume :
- 9
- Database :
- OpenAIRE
- Journal :
- Journal of Materials Research and Technology
- Accession number :
- edsair.doi.dedup.....06024bcc114b7a7b6b02178ff4212f78