Development of a New Method for the Quantitative Generation of an Artificial Joint Specimen with Specific Geometric Properties

Choi, Seungbeom; Lee, Sudeuk; Jeong, Hoyoung; Jeon, Seokwon

doi:10.3390/su11020373

Cited by 2 publications

(3 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…First, it is quite straightforward, and its outcomes can be directly imported to a 3D printer. Also, the manipulation of input parameters can derive satisfactory results in controlling joint roughness [25]. Figure 1 shows an example of the printed joint specimens following the method.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Experimental Study on Hydromechanical Behavior of an Artificial Rock Joint with Controlled Roughness

et al. 2019

Self Cite

View full text Add to dashboard Cite

Rock mass contains various discontinuities, such as faults, joints, and bedding planes. Among them, a joint is one of the most frequently encountered discontinuities in rock engineering applications. Generally, a joint exerts great influence on the mechanical and hydraulic behavior of rock mass, since it acts as a weak plane and as a fluid path in the rock mass. Therefore, an accurate understanding on joint characteristics is important in many projects. In-situ tests on joints are sometimes consumptive in terms of time and expenses so that the features are investigated by laboratory tests, providing fundamental properties for rock mass analyses. Although the behavior of a joint is affected by both mechanical and geometric conditions, the latter are often limited, since quantitative control on the conditions is quite complicated. In this study, artificial rock joints with various geometric conditions, i.e., joint roughness, were prepared in a quantitative manner and the hydromechanical characteristics were investigated by several laboratory experiments. Based on the results, a prediction model for hydraulic aperture was proposed in the form of ( e h / e m ) 3 = exp ( − 0.0462 c ) × ( 0.8864 ) J R C , which was a function of the mechanical aperture, joint roughness, and contact area. Relatively good agreement between the experimental results and predicted value indicated that the model is capable of estimating the hydraulic aperture properly.

show abstract

Section: Methodsmentioning

confidence: 99%

“…Figure1. Printed joint specimens following the random midpoint displacement method and their 3D models (after Reference[25]). …”

mentioning

confidence: 99%

Experimental Study on Hydromechanical Behavior of an Artificial Rock Joint with Controlled Roughness

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…Rock joints play an important role in the estimation of the shear strength of rock masses [1][2][3]. Effective design of rock engineering projects, such as underground excavations and open pit slopes, requires precise estimation of the shear strength of rock joints [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Scale Effects on Shear Strength of Rough Rock Joints Caused by Normal Stress Conditions

et al. 2023

View full text Add to dashboard Cite

Scale effects on the mechanical behavior of rock joints have been extensively studied in rocks and rock-like materials. However, limited attention has been paid to understanding scale effects on the shear strength of rock joints in relation to normal stress σn applied to rock samples under direct shear tests. In this research, a two-dimensional particle flow code (PFC2D) is adopted to build a synthetic sandstone rock model with a standard joint roughness coefficient (JRC) profile. The manufactured rock model, which is adjusted by the experiment data and tested by the empirical Barton’s shear strength criterion, is then used to research scale effects on the shear strength of rock joints caused by normal stresses. It is found that the failure type can be affected by JRC and σn. Therefore, a scale effect index (SEI) that is equal to JRC plus two times σn (MPa) is proposed to identify the types of shear failure. Overall, shearing off asperities is the main failure mechanism for rock samples with SEI > 14, which leads to negative scale effects. It is also found that the degree of scale effects on the shear strength of rock joints is more obvious at low normal stress conditions, where σn < 2 MPa.

show abstract

Development of a New Method for the Quantitative Generation of an Artificial Joint Specimen with Specific Geometric Properties

Cited by 2 publications

References 23 publications

Experimental Study on Hydromechanical Behavior of an Artificial Rock Joint with Controlled Roughness

Experimental Study on Hydromechanical Behavior of an Artificial Rock Joint with Controlled Roughness

Scale Effects on Shear Strength of Rough Rock Joints Caused by Normal Stress Conditions

Contact Info

Product

Resources

About