- 1School of Architecture and Civil Engineering, The University of Adelaide, Adelaide, Australia (g.nguyen@adelaide.edu.au)
- 2School of Chemical Engineering, The University of Adelaide, Adelaide, Australia
- 3Department of Civil Engineering, Monash University of Adelaide, Clayton, Australia
Snapback, a post-peak response often observed in brittle rocks, is crucial for accurately characterising fracture properties, particularly regarding size and strain rate effects. This study emphasises the application of the AUSBIT method, which utilises an indirect control approach, to maintain strain rate inside the fracture process zone (FPZ) within the quasi-static range. By selecting different specimen sizes, the AUSBIT technique effectively captures the snapback response while minimising dynamic effects.
The experimental results reveal significant variations in tensile strength measured using the AUSBIT method compared to traditional Brazilian Disc testing. This discrepancy highlights the effectiveness of AUSBIT in accurately reflecting the underlying fracture mechanisms through indirect strain-rate control. These findings offer important insights into rock fracture behaviours and support the potential of AUSBIT as a valuable tool for studying size and rate effects in brittle materials.
How to cite: Dharani Raj, S. V., Nguyen, T. N., Huang, Z., Nguyen, G. D., Karakus, M., Bui, H. H., and Phan, D.: Influence of loading control on tensile strength of rocks , EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-14623, https://doi.org/10.5194/egusphere-egu25-14623, 2025.
