Study on the Initiation of Interface Crack in Rock Joints

Chen, Xin; Gao, Wei; Ge, Shuangshuang; Zhou, Cong

doi:10.3390/ma15144881

Cited by 2 publications

(2 citation statements)

References 51 publications

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“…13, the particles will overlap with each other along the smooth interface in SJM. Moreover, this contact model can simulate the behavior of the cracks more realistically, which avoids the unrealistic mechanicals properties of joints induced by the bumpiness or roughness of the interface surfaces (Ivars et al 2011;Chen et al 2022). The size of the two-dimensional model is that the width and the height are 100 mm and 190 mm respectively without consideration of boundary size effects.…”

Section: Numerical Modelsmentioning

confidence: 99%

Theoretical study on fracture mechanism of rock bridge considering crack plastic propagation

Zhou¹,

Gao

Chen

2023

Preprint

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The research on the fracture mechanism of rock bridge is helpful to better understanding the failure process of rocks. In this paper, in order to study the influence of wing crack propagation on the stability of rock bridges, a new maximum plastic zone size fracture criterion is established according to the extension of plastic zone accompanied by crack propagation. Based on the new crack fracture criterion, a corresponding critical judgment condition is proposed considering the influence of multi-crack interaction on the wing crack propagation. Then, the fracture mechanism of rock bridges from the perspective of plastic zone extension was explored based on three different crack distribution models (cracks of equal length in parallel). It was found that the fracture mode of the rock bridge is deeply influenced by the dip angle of the rock bridge in the case where the rock bridge is of equal length to the pre-existing crack. The contact speed and contact mode of plastic zone varies for different dip angles of the rock bridge, but all the contact of plastic zone will eventually cause plastic yielding in the rock bridge zone. And then, the secondary cracks always start to propagate in the range of the plastic zone formed by the wing cracks, and eventually the rock bridge forms a macroscopic fracture damage due to the propagation of the secondary cracks.

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Section: Numerical Modelsmentioning

confidence: 99%

Theoretical study on fracture mechanism of rock bridge considering crack plastic propagation

Zhou¹,

Gao

Chen

2023

Preprint

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“…In order to better analyze the interfacial crack initiation, the stress intensity factors in different direction angles  near the crack tip can be defined as [23] Figure 4. Model of interfacial crack.…”

Section: Interfacial Crack Initiation Criterion Of Jointed Rock Massmentioning

confidence: 99%

Study on Interfacial Crack Initiation of Jointed Rock Mass Based on Interface Fracture Mechanics

Gao

Chen

2022

Fractal Fract

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The fracture of interfacial crack is the main failure type of jointed rock mass. Therefore, it is very important to study the interfacial fracture of jointed rock mass. For the similarity of jointed rock mass and composites (all are composed by two parts, intact materials and their contact interfaces), the interface fracture mechanics widely used for analysis the interface crack of the composites (bimaterials) can be applied to study the interfacial fracture of jointed rock mass. Therefore, based on the basic theories of interface fracture mechanics, the interfacial fracture of jointed rock mass was analyzed, and one new criterion of interfacial crack initiation for jointed rock mass is proposed. Moreover, based on the proposed interfacial crack initiation criterion, the effect of main influence factors on the interfacial crack initiation of jointed rock mass was analyzed comprehensively. At last, by using the triaxial compression numerical tests on a jointed rock mass specimen with interfacial crack, the theoretical studies were verified.

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Study on the Initiation of Interface Crack in Rock Joints

Cited by 2 publications

References 51 publications

Theoretical study on fracture mechanism of rock bridge considering crack plastic propagation

Theoretical study on fracture mechanism of rock bridge considering crack plastic propagation

Study on Interfacial Crack Initiation of Jointed Rock Mass Based on Interface Fracture Mechanics

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