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Experimental Mechanics
Erschienen in: Experimental Mechanics 5/2022

08.03.2022 | Research paper

A Dynamic Hydraulic Fracturing Test Technology Based on Split Hopkinson Pressure Bar System

verfasst von: R. Chen, Z. Y. Nie, Y. Peng, Y. Xu, W. Yao

Erschienen in: Experimental Mechanics | Ausgabe 5/2022

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Abstract

Background

The dynamic mechanical characteristics of rock under biaxial compression-tension stress states have essential engineering significance, but there is no relevant apparatus or approach.

Objective

A new technology to study the dynamic mechanical behavior of rock materials under compressive-tensile stress states based on SHPB devices is presented. An approximate approach is developed to determine the strength of rock material under biaxial stress states.

Methods

A hollow ring specimen is designed instead of the common cylindrical sample, and hydraulic oil is filled in the hollow region formed by the rock specimen and SHPB system. Once an incident stress wave is applied, the inner surface of the rock specimen firstly undergoes compressive pressure from oil, and then tensile stress arises along the circumferential direction of the ring specimen, thus, the rock is under a dynamic compression-tension stress state. To determine the strength of rock material under this stress state, theoretical analysis and numerical simulations are performed, and an approximate and practical approach is developed.

Results

Dynamic mechanical characteristics, including the strength, of seven marble samples under biaxial compressive-tensile stress state are obtained based on the newly proposed technology and approach. The test results show that it has a significant strain rate effect.

Conclusions

The new technology is effective and practical for studying the dynamic mechanical behavior of rock under biaxial compression-tension stress states, and it also provide an alternative method for characterizing the dynamic tensile strength of rock.
Vorheriger Artikel A Comparison of Conventional Gel Stiffness Characterization Techniques with Cavitation Rheology
Nächster Artikel Determining Dynamic Properties of Elastomer-Dampers by Means of Impact Testing

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Metadaten
Titel
A Dynamic Hydraulic Fracturing Test Technology Based on Split Hopkinson Pressure Bar System
verfasst von
R. Chen
Z. Y. Nie
Y. Peng
Y. Xu
W. Yao
Publikationsdatum
08.03.2022
Verlag
Springer US
Erschienen in
Experimental Mechanics / Ausgabe 5/2022
Print ISSN: 0014-4851
Elektronische ISSN: 1741-2765
DOI
https://doi.org/10.1007/s11340-022-00827-9

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