Damage characteristics and new constitutive model of sandstone under wet-dry cycles

Huang, Zhen; Zhang, Wei; Zhang, Hai; Zhang, Jiabing; Hu, Zhaojian

doi:10.1007/s11629-021-7239-8

Cited by 18 publications

(5 citation statements)

References 42 publications

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“…According to the calculation method of damage under the joint action of two factors proposed by Huang Z. et al 30 and Liu Z.X. et al 31 , the total damage variable is obtained, and calculated using the following formula: …”

Section: Materials Preparation and Applicationmentioning

confidence: 99%

Development of similar materials for fluid–solid coupling model testing and application in damage constitutive models

Ren,

Xu,

Chen

et al. 2024

Sci Rep

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In order to provide suitable material selection for such fluid–solid coupling model tests, orthogonal experimental studies were conducted using iron concentrate powder and barite powder as aggregates, cement as cementitious materials, and gypsum and clay as modifiers. This research showed: (1) The ATC plays a dominant role in controlling the strength indexes and water absorption of the material, and these indexes show a significant decrease with the increase of the bone adhesive ratio. For each level of ATC increase, the compressive strength decreases by 0.2 MPa, the elastic modulus decreases by 10–20 MPa, and the cohesion decreases by 25–45 kPa. (2) Mixing gypsum and cement cannot jointly promote strength growth. (3) With the increase of GTC, the water absorption rate of the material increases, while the softening coefficient and permeability coefficient decrease obviously. Gypsum, which accounts for 4–16% of cement content, can be suitable for studying the hydraulic properties of similar materials for most sedimentary rock. Based on Weibull statistical damage theory, a damage constitutive model for the entire process of rock triaxial compression under the combined action of rainwater infiltration and load was established. Due to the influence of internal pores, the experimental and theoretical results have a certain deviation, the higher the confining pressure, the more obvious the deviation. In addition, the higher the rock strength, the less obvious the deviation caused by pores. This damage model can better describe the progressive failure process of rocks after rainwater infiltration, and can provide theoretical reference for the study of slope stability caused by rainwater infiltration.

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Section: Materials Preparation and Applicationmentioning

confidence: 99%

Development of similar materials for fluid–solid coupling model testing and application in damage constitutive models

Ren,

Xu,

Chen

et al. 2024

Sci Rep

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“…Under long-term dry-wet cycling, the different mineralogical components of the rock samples underwent hydrolysis reactions with water, which is the fundamental reason for the variation in the relative content of the mineralogical components [37,38]. The feldspar hydrolysis reaction is shown in Equations ( 4) and ( 5), and the calcite mineral hydrolysis reaction is shown in Equation (6).…”

Section: Strength Deterioration Decay Predictionmentioning

confidence: 99%

Effect of Dry–Wet Cycling on the Degradation Characteristics and Mechanisms of Red Sandstone

et al. 2023

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The physical and mechanical parameters and degradation mechanisms of red sandstone in the Mount Wuyi scenic area were studied under the action of dry–wet cycles. Dry–wet cycle, acoustic wave velocity, water saturation rate, and triaxial compression tests were conducted, aided by scanning electron microscopy and X-ray diffraction testing techniques. The study’s results show that the dry–wet cycle effect on red sandstone is a major factor in the degradation of its physical and mechanical parameters and that its microstructural characteristics are significantly affected. The P-wave velocity, peak strength, elastic modulus, internal friction angle, and cohesion decreased, the water content and peak strain increased, and the elastic modulus was the most sensitive to dry–wet cycles. A dry–wet cycle’s action severely damages the microstructural integrity of the red sandstone. After 15 dry–wet cycles, the interstitial fillings between the skeletal grains are dissolved over a large area, microfractures are interwoven throughout, and the structure is severely fragmented. The microstructural degradation of the red sandstone by dry–wet cycles mainly manifests in the dissolution of the interstitial filler, and the relative content of calcite as an interstitial filler is reduced by 46.6% after 15 dry–wet cycles. The proposed strength decay prediction equation has reference significance for the strength prediction of the red sand conglomerate in the project. This study’s results can provide theoretical support for the landscape protection of rock masses and the prevention of engineering geological hazards.

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“…Water-rock interactions are prevalent in natural settings and involve various states of water saturation and recurrent dry-wet cycles, which are among the most ubiquitous water-rock interactions in nature [1][2]. These interactions significantly affect the safety and stability of slopes and tunnels, positioning them as a focal point of research in geotechnical engineering [3][4].…”

Section: Introductionmentioning

confidence: 99%

Study on rock energy evolution and constitutive model under water–rock interaction

Zhang,

Liu,

Huang

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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To explore the degradation in rock mechanical properties due to water–rock interactions and formulate a nonlinear damage constitutive model for the entire stress–strain curve of rocks, experiments involving saturated, dry-wet cycling, and uniaxial compression tests were conducted on granite and siltstone. Based on energy theory, the energy evolution of the rock throughout the testing process was scrutinized. The range of the compaction stage was identified through the analysis of the dissipation energy change curve. A nonlinear damage constitutive model for rocks subjected to water-rock interactions was then devised, drawing on concepts from statistical damage mechanics. The findings indicated a progressive reduction in uniaxial compressive strength and elastic modulus due to water–rock interactions, while the Poisson’s ratio was observed to increase. The energy density curve under these conditions delineated four distinct phases: compaction energy dissipation, linear energy accumulation, pre-peak gradient increase, and post-peak sudden change. The introduction of the unit elastic strain energy density metric underscored the deteriorating effects from an energy standpoint. A nonlinear damage constitutive model, incorporating the compaction stage based on a coupled damage variable, was formulated. The predictions of this model closely matched the empirical data, thereby affirming its validity. This model provides an enhanced depiction of rock deformation and failure mechanisms under the influence of water–rock interactions.

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Damage characteristics and new constitutive model of sandstone under wet-dry cycles

Cited by 18 publications

References 42 publications

Development of similar materials for fluid–solid coupling model testing and application in damage constitutive models

Development of similar materials for fluid–solid coupling model testing and application in damage constitutive models

Effect of Dry–Wet Cycling on the Degradation Characteristics and Mechanisms of Red Sandstone

Study on rock energy evolution and constitutive model under water–rock interaction

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