Acta Geotechnica最新文献_第4页

Dense granular flow described by micropolar fluid and its peridynamic implementation 微极流体描述的致密颗粒流及其周动力学实现

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2024-10-25 DOI: 10.1007/s11440-024-02435-4

Ji Wan, Wenzhong Qu, Xihua Chu

{"title":"Dense granular flow described by micropolar fluid and its peridynamic implementation","authors":"Ji Wan, Wenzhong Qu, Xihua Chu","doi":"10.1007/s11440-024-02435-4","DOIUrl":"10.1007/s11440-024-02435-4","url":null,"abstract":"<div><p>This work presents a nonlocal mesh-free peridynamic model for micropolar fluids that describe fluids enriched with the micro-rotational and length scale effects. The stabilized force state is applied to remedy the zero-energy mode instability in the micropolar viscous term. The present model is validated with the planar Couette flow and Poiseuille flow simulation. Considering the natural inheritance of micro-spinning and microstructures in granular flows, the peridynamic micropolar fluid model is also applied to simulate the dense, dry granular flow with a modified <span>(mu (I))</span> rheology flow law. The effects of the coupling number, the micro-inertia, the characteristic length, and the peridynamic horizon size on the granular <span>(mu (I))</span> flow are discussed in a two-dimensional column collapse example. The numerical results of column collapse show that the micropolar coupling number can significantly affect column collapse behavior. A larger coupling number can slow down the translational movement of the granular flow, resulting in a larger angle of repose. The micro-rotational velocity increases by enlarging the coupling number. The micro-inertia and characteristic length have a significant influence on the micro-rotational behavior of the granular flow. Increasing either micro-inertia or characteristic length value decreases the micro-rotational velocity. However, the characteristic length and micro-inertia have an insignificant influence on translational velocity. Slight differences are observed in the translational velocity distribution or free surface profile. For the horizon size, we find it affects the granular flow only on the micro-rotational velocity and runout distance.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 1","pages":"413 - 438"},"PeriodicalIF":5.6,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142962963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance of debris flow barriers: an energy perspective

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2024-10-24 DOI: 10.1007/s11440-024-02430-9

Hongyu Luo, Limin Zhang, Jian He, Jiawen Zhou

{"title":"Performance of debris flow barriers: an energy perspective","authors":"Hongyu Luo, Limin Zhang, Jian He, Jiawen Zhou","doi":"10.1007/s11440-024-02430-9","DOIUrl":"10.1007/s11440-024-02430-9","url":null,"abstract":"<div><p>Barrier systems are widely applied to impede or retain debris flows. Due to complex flow characteristics and the lack of accurate measurements, the performance of different types of debris flow barriers is difficult to quantify. In this study, a coupled DEM-ALE-FEM method is employed to offer an insight into energy dissipation mechanisms in flow-barrier interactions. Two energy criteria are proposed to evaluate the energy dissipation efficiencies and impact forces of three common types of barriers (rigid barriers, baffles and flexible barriers). The simulation results reveal that a large channel slope or a high solid concentration of debris flow enhances the energy transfer process for all barrier types. The overflow effect is a key factor for barrier type selection. Under significant overflow conditions, the baffle structure outperforms the other two barrier types in terms of both energy transfer and dissipation efficiency. The efficiency of a rigid barrier is sensitive to the barrier height, which is determined by the runup height. The rigid barrier performs better with the increase in barrier height. The flexible net barrier with a smaller net opening than the solid particle size is a good option that balances energy dissipation efficiency and construction cost, especially for flows of high solid concentrations. The rigid barrier outperforms the other two barrier types for debris flows of low solid concentrations. The in-depth study of the barrier energy dissipation efficiency as carried out here facilitates the selection and design of barriers in mitigating debris flow hazards.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 2","pages":"987 - 1000"},"PeriodicalIF":5.6,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143362125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Formulation and implementation of an isotropic plasticity model enriched with shift stress and fractional flow rule

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2024-10-23 DOI: 10.1007/s11440-024-02439-0

Xingbo Huang, Yifei Sun, Wojciech Sumelka, Yufeng Gao

{"title":"Formulation and implementation of an isotropic plasticity model enriched with shift stress and fractional flow rule","authors":"Xingbo Huang, Yifei Sun, Wojciech Sumelka, Yufeng Gao","doi":"10.1007/s11440-024-02439-0","DOIUrl":"10.1007/s11440-024-02439-0","url":null,"abstract":"<div><p>Clay and sand were often treated as two different materials that required respective constitutive models to capture the state-dependent nonassociated responses. This study developed a three-dimensional isotropic plasticity model for clay with different over-consolidation ratios (OCRs) and sand with particle breakage, through adopting shift stress-enriched loading/bounding surface, fractional flow rule and flexible critical state line, in the transformed stress space. The model was implemented in Abaqus through UMAT subroutine with an explicit adaptive substepping integration algorithm. Validation against a series of element tests on clay and sand showed that the unified model can well reproduce the stress–strain and critical state behavior of clay and sand. To further demonstrate the capability of the model, two typical boundary value problems, i.e., shear band and ground settlement, were simulated. It was found that as the shear band initiated, higher shear strain and dilatancy were accumulated within the shear band, whereas dilatancy outside the shear band ceased soon with further shearing. Ground settlement and the associated excess pore water pressure at the same consolidation time decreased with the increasing OCR, which agreed well with other studies. The simulation performances verified the capability of the unified model in resolving practical engineering problems.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 2","pages":"803 - 821"},"PeriodicalIF":5.6,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fault rupture propagation through stratified sand–clay deposits and engineered earth structures: a meshfree and critical-state modeling approach 断层破裂在层状砂粘土沉积物和工程土结构中的传播：一种无网格和临界状态建模方法

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2024-10-23 DOI: 10.1007/s11440-024-02421-w

Enrique M. del Castillo, Alomir H. Fávero Neto, Ronaldo I. Borja

{"title":"Fault rupture propagation through stratified sand–clay deposits and engineered earth structures: a meshfree and critical-state modeling approach","authors":"Enrique M. del Castillo, Alomir H. Fávero Neto, Ronaldo I. Borja","doi":"10.1007/s11440-024-02421-w","DOIUrl":"10.1007/s11440-024-02421-w","url":null,"abstract":"<div><p>Permanent deformation and uplift caused by fault rupture is one of the most significant hazards posed by earthquakes on the built environment. In this paper, we use smoothed particle hydrodynamics (SPH) to explore the effects of soil layering or stratification on the trajectories and deformation patterns caused by rupturing reverse faults in bedrock, as well as in the foundations of engineered earth structures. SPH is a continuum meshfree numerical method highly adept at modeling large deformation problems in geotechnics. Through the use of constitutive models involving softening behavior as well as critical state type models, we isolate the effects of rigid body rotation from critical state behavior of soil in helping explain the frequently observed rotation of shear bands emanating from the bedrock fault. This analysis is facilitated by the fact that the SPH method allows us to track the propagation of shear bands over substantial amounts of vertical uplift (more than 50% of the total height of the soil deposit), far beyond many previous computational studies employing the finite element method (FEM). We observe and characterize various emergent features including fault bifurcations, stunted faults, and tension cracking, while providing insights into practical guidelines regarding the potential surface distortion width, and the critical amount of fault displacement required for surface rupture depending on the multilayered constitution of the soil deposit. Finally, we predict the expected amount of surface distortion and internal damage to earthen embankments depending on varying fault location and soil makeup.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"19 12","pages":"7767 - 7798"},"PeriodicalIF":5.6,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142754317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Practical estimation of the thermal conductivity of granular soils considering grading and relative density using three physical parameters

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2024-10-23 DOI: 10.1007/s11440-024-02431-8

Xiusong Shi, Jinzhi Lin, Hao Xiong, Jiaying Liu, Yiwen Zeng

{"title":"Practical estimation of the thermal conductivity of granular soils considering grading and relative density using three physical parameters","authors":"Xiusong Shi, Jinzhi Lin, Hao Xiong, Jiaying Liu, Yiwen Zeng","doi":"10.1007/s11440-024-02431-8","DOIUrl":"10.1007/s11440-024-02431-8","url":null,"abstract":"<div><p>The thermal conductivity of granular soils is widely used for analyzing the thermal stability in geo-structure. Particle size distribution is a crucial feature in characterizing the inter-granular structure of granular materials, and the mechanism governing the grading effect on thermal properties is not fully understood. Therefore, 154 laboratory tests have been performed to investigate the thermal conductivity of quartz sands with different gradings, including continuous gradings with various uniformity coefficient (2–10.6) and mean particle size (0.25–1.33 mm) and gap gradings with different fine content (0–100%), size ratio (2.7–9.5), and uniformity coefficient of coarse particles (1.3–3.9). The result indicates that the variation of thermal conductivity with grading is inversely related to the change of void ratio with grading at the same initial state. For a given void ratio, the thermal conductivity of the continuously graded sands is affected by both the uniformity coefficient and mean particle size. Besides, the thermal conductivity of the gap-graded sands varies with fine content and size ratio, but has no significant correlation with the uniformity coefficient of coarse particles under the fine-dominated structure. Based on the experimental data in this study, an empirical model is formulated for dry quartz sands with broad spectrum of grading. The model has only three physical parameters (representative particle size and limiting void ratios), which can be readily determined from conventional laboratory tests. The error of the proposed model is basically less than 10% and 20–25% for crushed and natural quartz sands, respectively, indicating that this model is effective for quartz sands with a broad spectrum of grading and wide range of void ratio.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 2","pages":"965 - 985"},"PeriodicalIF":5.6,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143362189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of layering and pre-loading on the dynamic properties of sand-rubber specimens in resonant column tests

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2024-10-23 DOI: 10.1007/s11440-024-02398-6

Magdalena Kowalska, Christos Vrettos

{"title":"Effect of layering and pre-loading on the dynamic properties of sand-rubber specimens in resonant column tests","authors":"Magdalena Kowalska, Christos Vrettos","doi":"10.1007/s11440-024-02398-6","DOIUrl":"10.1007/s11440-024-02398-6","url":null,"abstract":"<div><p>Several studies show that scrap tyre rubber mixed with sand is an effective and sustainable method for mitigating vibrations. The dynamic and cyclic response of this composite soil has already been investigated. However, layered sand-rubber configurations have not been considered yet. This study reports findings of resonant column tests on three types of specimen: (a) sand-only or rubber-only, (b) layered sand-rubber, and (c) sand-rubber mixtures. The analysis allowed for an evaluation of the maximum shear modulus and its degradation with strain over a wide range of confining stress and shear strain. The evolution of the damping ratio with strain was determined analogously. Effects of pre-loading and pre-straining were also considered. The results show that the behaviour of layered specimens is much more similar to that of pure rubber than to sand-rubber mixtures, with very low shear modulus values, smaller degradation of stiffness with strain and pre-loading, and higher damping. For example, at the confining stress of 100 kPa and rubber content of 0/33.3/50/67.7/100% by volume, the small strain shear moduli for sand-rubber mixtures are equal to 98.3/30.4/15.4/7.1/1.3 MPa and 98.3/3.6-4.2/2.4-2.8/2.1/1.3 MPa for sand-rubber layered specimens, depending on the arrangement of layers. A shear beam model is shown to be adequate for calculating the response of the layered specimens comprising layers of large stiffness contrast.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 2","pages":"607 - 624"},"PeriodicalIF":5.6,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11440-024-02398-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A theoretical model for trapdoor tests considering the interaction of soil arches 考虑土拱相互作用的活门试验理论模型

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2024-10-23 DOI: 10.1007/s11440-024-02420-x

Rui-Xiao Zhang, Dong Su, Xing-Tao Lin, Xiang-Sheng Chen

{"title":"A theoretical model for trapdoor tests considering the interaction of soil arches","authors":"Rui-Xiao Zhang, Dong Su, Xing-Tao Lin, Xiang-Sheng Chen","doi":"10.1007/s11440-024-02420-x","DOIUrl":"10.1007/s11440-024-02420-x","url":null,"abstract":"<div><p>Precisely evaluating the soil pressure above parallel tunnels is of paramount importance. In this study, the deformation characteristics of soil above dual trapdoors were analyzed firstly. A novel multi-arch model for calculating the distribution of the vertical earth pressure on deep-buried parallel tunnel was then proposed based on the limit equilibrium method. The height of the dual arch zone caused by the displacement of the dual trapdoors was calculated with consideration of internal friction angle of the soil, width of the trapdoors, spacing between the dual trapdoors, and elastic modulus of the soil. By comparing with numerical simulation results and existing theoretical calculation models that do not account for the interaction of soil arching effect, it is evident that the proposed model in this study adeptly predicts the vertical stress above the trapdoor. Additionally, it captures the characteristic of upwardly convex stress distribution above the trapdoor. The analysis of parameters conducted on the theoretical calculation model showed that the depth of the trapdoor and the internal friction angle of the soil have a substantial impact, whereas the expansion coefficient exerts a negligible effect on the soil arching ratio above the trapdoor.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 2","pages":"707 - 721"},"PeriodicalIF":5.6,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation of the failure and run-out processes of rotational–translational loess landslides using an SPH model considering strain softening 考虑应变软化的SPH模型模拟旋转平移黄土滑坡破坏与溃退过程

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2024-10-22 DOI: 10.1007/s11440-024-02427-4

Zhitian Qiao, Wei Shen, Peng Xin, Tonglu Li, Ping Li, Hongcheng Jiao

{"title":"Simulation of the failure and run-out processes of rotational–translational loess landslides using an SPH model considering strain softening","authors":"Zhitian Qiao, Wei Shen, Peng Xin, Tonglu Li, Ping Li, Hongcheng Jiao","doi":"10.1007/s11440-024-02427-4","DOIUrl":"10.1007/s11440-024-02427-4","url":null,"abstract":"<div><p>The rotational–translational loess landslides are widely distributed in northwest China, usually posing threats to the surrounding residents and infrastructure. These loess landslides are characterized by the formation of multiple slip surfaces during the run-out process, and the mechanisms of this phenomenon in loess landslides have not been sufficiently investigated. Therefore, in this paper, we integrated the elastic–plastic strain softening constitutive law into the original DualSPHysics code to extend its application in simulating rotational–translational loess landslides. Two benchmark cases are studied to validate the model, the failure process of a cohesive soil slope without strain softening and that of a sensitive clay slope with strain softening. The results illustrate that our model can effectively predict large deformation. Then, the run-out process of the Caijiapo landslide in northwest China is analyzed by the modified model to investigate its failure mechanism. The results illustrate that the failure pattern of the Caijiapo loess landslide is very different from the typical retrogressive failure of clay landslides. The main slip surface of the Caijiapo landslide is controlled by the pre-existing structural plane. The second and third slip surfaces of this landslide are formed inside the sliding mass due to stress redistribution during the run-out process. Three scarps are formed in the landslide deposit because of the formation of multiple slip surfaces. This deposition morphology can be well reproduced by the SPH model taking strain softening into account, while the results using an SPH model without considering strain softening cannot capture this essential deformation characteristic.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"19 12","pages":"7799 - 7820"},"PeriodicalIF":5.6,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142754256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Scaled model tests on pile types influencing the stability of stiffened deep mixed pile-supported embankment over soft clay

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2024-10-21 DOI: 10.1007/s11440-024-02424-7

Zhen Zhang, Lingxu Li, Guanbao Ye, Meng Wang, Yan Xiao, Xun Wan

{"title":"Scaled model tests on pile types influencing the stability of stiffened deep mixed pile-supported embankment over soft clay","authors":"Zhen Zhang, Lingxu Li, Guanbao Ye, Meng Wang, Yan Xiao, Xun Wan","doi":"10.1007/s11440-024-02424-7","DOIUrl":"10.1007/s11440-024-02424-7","url":null,"abstract":"<div><p>Stiffened deep mixed (SDM) piles can be classified into three types based on the relative lengths of the core pile and the outer DM pile: the length of the core pile is shorter than, equal to, or longer than that of the outer DM pile. Limited research has been undertaken to investigate the performance of embankments supported by various types of SDM piles over soft soil. This study carried out a series of model tests to investigate the stability of embankment over soft clay improved by different types of SDM piles. The test results indicated that the improvement factors for embankment stability were 1.37, 1.87, and 1.75 for the tests with short-core, equal-core and long-core SDM piles, respectively. Significant vertical stress was concentrated onto the core pile due to its high stiffness, while the outer DM pile yielded earlier. Under the embankment crest, SDM piles generally failed by compression, while the short-core SDM pile exhibited bulging beneath the core pile tips, and the long-core SDM pile fractured at the unwrapped section. The SDM piles under the embankment slope mainly bore bending moments, and the type of SDM piles affected the bending pattern. The stability of SDM pile-supported embankments can be reasonably evaluated by considering the resisting moment of the piles due to lateral force. The position parameter of equivalent lateral force in an SDM pile-supported embankment ranges from 1/4 to 2/5.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 2","pages":"625 - 640"},"PeriodicalIF":5.6,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Crack propagation and stress evolution in fluid-exposed limestones 流体暴露灰岩裂纹扩展与应力演化

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2024-10-17 DOI: 10.1007/s11440-024-02418-5

Z. Liu, R. Dabloul, B. Jin, B. Jha

{"title":"Crack propagation and stress evolution in fluid-exposed limestones","authors":"Z. Liu, R. Dabloul, B. Jin, B. Jha","doi":"10.1007/s11440-024-02418-5","DOIUrl":"10.1007/s11440-024-02418-5","url":null,"abstract":"<div><p>Crack initiation and propagation in rocks exposed to injected fluids must be understood better for sustainable sequestration and geo-energy applications. One specific challenge is the characterization of the fluid-induced changes in the stress state and mechanical properties when multiple cracks grow and interact with each other. We conduct crack propagation tests on brine-exposed and supercritical <span>(hbox {CO}_2)</span>-exposed Indiana limestone samples under uniaxial compression conditions. By analyzing the displacement and strain fields using Digital Image Correlation and the first arrival time and amplitude of the transmitted shear waves, we characterize the effect of crack propagation and interaction events on stress and toughness. We build 3-D simulation models of crack propagation under uniaxial compression using the extended finite element method to analyze the 3-D stress and deformation fields in high resolution. We quantify the evolution of crack-tip’s J-integral value with the crack length for wing cracks and shear cracks in samples exposed to mixtures of brine and supercritical <span>(hbox {CO}_2)</span> at subsurface conditions. Experimental and simulation results are synthesized to gain insights into crack propagation, shear-to-tensile failure transition, and interaction of cracks in fluid-exposed rocks. Crack length and J-integral analysis quantifies the impact of fluid exposure on the fracture toughness.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 1","pages":"265 - 285"},"PeriodicalIF":5.6,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11440-024-02418-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142963105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0