Mechanical Behavior of a Granite from Wuyi Mountain: Insights from Strain-Based Approaches

Xiong, Liangfeng; Wu, Shunchuan; Zhang, Shihuai

doi:10.1007/s00603-018-1617-8

Cited by 16 publications

(8 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In conclusion, the damage evolution is influenced by the initial damage state and confining pressure. Figure 5 shows the variation of radial plastic strain with the maximum axial strain, it can be seen that the radial strain is smaller in the initial stage, and even compressive characteristic appeared, this phenomenon was also obtained by Xiong et al (2019). The partial enlarged drawing of the radial plastic strain is shown in Fig.…”

Section: Evolution Of Plastic Strain Of Thermal Treated Granite Specimentioning

confidence: 71%

“…Poisson's ratio remains near constant in the initial stage, then increases rapidly, and decreases slightly before entering a stable phase again with cycle number on the whole. The slight decreases of Poisson's ratio are also obtained by Xiong et al (2019). It indicates that there is few crack induced by loading in the initial stage, and the radial strain is not evident.…”

Section: Evolution Of Elastic Modulus and Poisson's Ratio Of Thermal mentioning

confidence: 76%

“…X-ray micro-CT, P-wave and photomicrographs were also used to investigate the effect of cyclic loading, and more branch crack can be observed in the specimen under cyclic loading than monotonic loading (Yang et al, 2015(Yang et al, , 2017a. The development of the damage state can be briefly divided into three stages, which is as follows: constant gain rate during the pre-peak stage, increasing gain rate during the strain softening stage, and constant gain rate during the residual stage (Xiong et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Failure Behavior of the Thermal Treated Granite under Triaxial Cyclic Loading-unloading Compression

Tian

Yang

Wang

et al. 2020

Preprint

View full text Add to dashboard Cite

The failure behavior of thermal treated granite under triaxial tiered cyclic loading-unloading compression has a significant effect on the safe and stable operation of HLW disposal repository. Therefore, the stress-strain curves, elastic modulus, Poisson's ratio, plastic strain, dissipated energy and failure characteristic of the thermal treated granite specimens under triaxial compression were analyzed by experiment and numerical simulation. The results indicate that the elastic, Poisson's ratio, axial plastic strain, dissipated energy and accumulative AE counts slightly increase with cyclic loading at initial loading and elastic deformation stage when T = 25 and 300°C, which means that less damage was induced by cyclic loading. However, damage occurred once cyclic loading was applied when T = 600°C. Radial strain even showed compressive characteristic in the initial stage, which indicates that grains adjustment occurred under triaxial cyclic loading-unloading compression. And, the compressive characteristic is more obvious with the increase of temperature or the decrease of confining pressure. The failure modes under triaxial cyclic loading are more complicated than that under triaxial monotonic loading, which make the shear plane rougher. Therefore, the residual strength is higher than that under monotonic loading. When T = 600°C, micro-crack continuously increases under uniaxial unloading and loading process, which result in a decrease of the peak strength under cyclic loading compared with that under monotonic loading.

show abstract

Section: Evolution Of Plastic Strain Of Thermal Treated Granite Specimentioning

confidence: 71%

Section: Evolution Of Elastic Modulus and Poisson's Ratio Of Thermal mentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Failure Behavior of the Thermal Treated Granite under Triaxial Cyclic Loading-unloading Compression

Tian

Yang

Wang

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…4). As described by and Xiong et al (2019) for different stages of stress-strain curves, the crack closure stage (O -A), linear elastic stage (A -B), stable crack growth stage (B -C), unstable crack growth stage (C -D), and the stress relief stage (D -E) after the failure limit point D. All rock samples can be classified into 5 types according to the curve shape and corresponding stress threshold (Fig. 4; Table 3).…”

Section: Stress-strain Curvesmentioning

confidence: 99%

Impact of Lithologic Heterogeneity on Brittleness of Cenozoic Mixed Fine-grained Sedimentary Rock Reservoirs in Western Qaidam Basin

Li¹,

Wu²,

Wang³

et al. 2022

Preprint

View full text Add to dashboard Cite

In order to understand the impact of lithologic heterogeneity of continental mixed fine-grained sedimentary rocks on reservoir brittleness in western Qaidam basin, the mechanical properties of the rocks and their correlation with mineral composition and petrographic characteristics were studied by measns of mineralogy, petrography and triaxial stress test. The results show that the reservoir rocks can be divided into 5 different types according to the mechanical properties of the reservoir (characteristics of stress-strain curves), among them Type I and III belong to similar elastoplastic failure model, type II shows a special pulse failure mode for plastic material, type IV shows a failure mode of mixed characteristics, and type V exhibits a typical plastic failure model. The correlation between minerals and mechanical properties indicates that quartz and feldspar, which are often considered brittle minerals, do not contribute much to the brittleness of continental fine-grained sedimentary rocks. The main minerals affecting reservoir brittleness are dolomite and clay minerals, and their contributions to reservoir brittleness are positive and negative, respectively. The petrographic analysis results prove that the abnormal correlation between rock mechanical properties and quartz and feldspar is caused by the different rock fabrics. When dolomite forms a rock skeleton, it typically exhibits greater strength, brittleness and physical properties than other minerals. Based on the results, a brittleness evaluation standard for continental fine-grained sedimentary rock reservoir is proposed, and the validity of the standard is verified by the spatial correlation between the lithology probability model and the micro-seismic monitoring data, indicating that the spatial heterogeneity of dolomite-rich rock is the main controlling factor for the development of ‘sweet spot’ in the Cenozoic continental fine-grained sedimentary rock reservoir in the Western Qaidam Basin.

show abstract

“…The high biodiversity of southern China is due in large part to the extreme physiographical heterogeneity of its mountain ranges (Fan et al , 2018;Xu et al, 2017;Yang, Dick, Yao, & Huang, 2016). Often oriented in either north-south or northeast-southwest directions (Hou, 1983;Wang, 1992a;Wang, 1992b;Ying, 2001), these topographically diverse ranges have been suggested to serve as either geographical barriers or colonization corridors for various plant species (Gong et al, 2016;Tian et al, 2018;Xiong, Wu, & Zhang, 2019). Their local habitat uniqueness has been attributed to complex topography correlated with longitudinal or steep elevational gradients (Qiu, Zeng, Chen, Zhang, & Zhong, 2013;Wang, Fang, Tang, & Shi, 2012).…”

Section: Introductionmentioning

confidence: 99%

Population dynamics linked to glacial cycles in Cercis chuniana F.P. Metcalf (Fabaceae) endemic to the montane regions of southern China

Liu

Xie

Zhou

et al. 2020

Preprint

View full text Add to dashboard Cite

The mountains of southern China are an excellent system for investigating the processes driving the geographic distribution of biodiversity and radiation of plant populations in response to Pleistocene climate fluctuations. How the key mountain ranges in southern China have affected the evolution of narrowly distributed species is less studied than more widespread species. Here we focused on Cercis chuniana, a woody species endemic to the southern mountain ranges in subtropical China, to elucidate its population dynamics. We used genotyping by sequencing (GBS) to investigate the spatial pattern of genetic variation among 11 populations. Bayesian time estimation revealed that population divergence occurred in the middle Pleistocene, when populations in the Nanling Mts. separated from those to the east. Geographical isolation was detected between the populations located in adjacent mountain ranges, thought to function as geographical barriers due to their complex physiography. As inferred by ecological niche modeling and coalescent simulations, secondary contact occurred during the warm Lushan-Tali interglacial period in China, with intensified East Asia summer monsoon and continuous habitat available for occupation. Complex physiography plus long-term stable ecological conditions across glacial cycles facilitated the demographic expansion in the Nanling Mts., from which contemporary migration began. Our work shows that population genomic approaches are effective in detecting the population dynamics of narrowly distributed species. This study advances our understanding how glacial cycles have affected the evolutionary history of plant species in southern China montane ecosystems.

show abstract

Mechanical Behavior of a Granite from Wuyi Mountain: Insights from Strain-Based Approaches

Cited by 16 publications

References 62 publications

Failure Behavior of the Thermal Treated Granite under Triaxial Cyclic Loading-unloading Compression

Failure Behavior of the Thermal Treated Granite under Triaxial Cyclic Loading-unloading Compression

Impact of Lithologic Heterogeneity on Brittleness of Cenozoic Mixed Fine-grained Sedimentary Rock Reservoirs in Western Qaidam Basin

Population dynamics linked to glacial cycles in Cercis chuniana F.P. Metcalf (Fabaceae) endemic to the montane regions of southern China

Contact Info

Product

Resources

About