Ductile Mode Cutting of Brittle Materials: Mechanism, Chip Formation and Machined Surfaces

Li, Xiaoping

doi:10.1002/9780470611807.ch2

Cited by 19 publications

(17 citation statements)

References 29 publications

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“…After screening the previous research findings, we found just a few field surveys and monitoring data for this type of landslide. In previous studies, specific geomechanical models for the failure mode under different rainfall conditions have been established, and many laboratory experiments have been conducted to verify the models (Fan et al, 2008;Xu and Zeng, 2009). However, all these geomechanical models should be proved by the long-term monitoring data.…”

Section: The Occurrences Of Plate-shaped Translational Landslidesmentioning

confidence: 99%

“…According to the detailed field surveys and preliminary analysis of Wobaoshi landslide, this landside should be categorized as rainfall-induced translational landslide according to the landslide geometry, lithology conditions, slope structures, and water accumulation situation in cracks (Xu et al, 2010). Based on the previous landslide monitoring cases (Ayalew et al, 2005;Fan et al, 2009), the rainfall, width of cracks I and II, and level of accumulated water in cracks I and II were chosen as key monitoring indicators for the Wobaoshi landslide.…”

Section: Monitoring Schemementioning

confidence: 99%

“…Furthermore, these monitoring data should be utilized to assess the future sliding tendency of the Wobaoshi landslide so as to take some proper prevention countermeasures. Some typical geomechanical models for translational plate landslides have been established and applied in some cases successfully (Fan, 2007;Xu et al, 2010). In this research, because of the slightly different landslide geometry, one new geomechanical model should be created to conduct the stability analysis and simulate the failure mode and processes.…”

Section: Geomechanical Analysis and Numerical Modelingmentioning

confidence: 99%

“…During the monsoon season, especially in the rainstorm scenario, the main body is pushed horizontally along the sliding surface. Some scholars have defined this sliding body as a flat-push landslide, which is a typical rainfall-induced landslide (Zhang et al, 1994;Xu et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…With respect to the geomechanical analysis of rainfallinduced translational landslide, scholars and researchers have used physical simulation experiments (Fan et al, 2008), geomechanical modeling analysis (Fan et al, 2009;Xu et al, 2010), susceptibility models (Hussin et al, 2013), and satellite remote-sensing methods (Barlow et al, 2003;Martin and Franklin, 2005) to investigate the formation mechanism, initiation criteria, and sensitivity analysis of the safety factors. Fan et al (2008) reproduced the deformation and failure process of the landslides via a physical simulation and further verified the deformation mechanism as well as the initiation criterion formula of the flat-push landslide (Zhang et al, 1994).…”

Section: Introductionmentioning

confidence: 99%

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Analysis of the instability conditions and failure mode of a special type of translational landslide using long-term monitoring data: a case study of the Wobaoshi landslide (in Bazhong, China)

Liu

Wang

Gao

et al. 2020

Nat. Hazards Earth Syst. Sci.

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Abstract. A translational landslide comprised of nearly horizontal sandstone and mudstone interbeds occurred in the Ba River basin of the Qinba–Longnan mountainous area. Previous studies have succeeded to some extent in investigating the formation mechanism and failure mode of this type of rainfall-induced landslide. However, it is very difficult to demonstrate and validate the previously established geomechanical model, owing to lack of landslide monitoring data. In this study, we considered a translational landslide exhibiting an unusual morphology, i.e., the Wobaoshi landslide, which occurred in Bazhong, China. First, geological conditions of this landslide were determined through field surveys, and the deformation and failure mode of the plate-shaped main bodies were analyzed. Second, long-term monitoring was performed to obtain multiparameter monitoring data (width of the crown crack, rainfall, and accumulated water pressure in cracks). Finally, an equation was developed to evaluate the critical water height of the multistage bodies, i.e., hcr, based on the geomechanical model analysis of the multistage main sliding bodies, and the reliability of this equation was verified using long-term relevant monitoring data. Subsequently, the deformation and failure mode of the plate-shaped bodies were analyzed and investigated based on numerical simulations and calculations. Thus, the monitoring data and geomechanical model proved that the accumulated water pressure in cracks makes cracks open much wider and causes the plate-shaped bodies to creep. Simultaneously, an optimized monitoring methodology was proposed for this type of landslide. Therefore, these research findings are of reference significance for the rainfall-induced translational landslides in this area.

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Section: The Occurrences Of Plate-shaped Translational Landslidesmentioning

confidence: 99%