In order to consider the effect of fabric anisotropy in analysis geotechnical boundary value problems, this study proposes a modified model based on fabric-based Cam-clay model, which can account for anisotropic response soil. The major modification original aims simplify equations numerical implementation by replacing SMP strength criterion with Lade’s criterion. This comprehensively considers inherent anisotropy, induced and three-dimensional characteristics is first numerically...

The long-term effects of dry–wet cycles induced by seasonal rainfall significantly influence the creep behavior sliding zone soft rocks, contributing to landslide occurrence. Understanding this aspect is crucial for predicting and mitigating slope instability. This study investigates Mohuandang landslide, conducting shear tests on carbonaceous shale under cycles. A quantitative approach was introduced, incorporating a fractional derivative modify Burgers model develop an improved equation....

A rock creep constitutive model is the core content of rheological mechanics theory and great significance for studying long‐term stability engineering. Most models constructed in previous studies have complex types many parameters. Based on fractional calculus theory, this paper explores curve characteristics elements with order change, constructs a nonlinear viscoelastic‐plastic based calculus, deduces equation. By using user‐defined function fitting tool Origin software...

Mudstone interlayer is a weak layer in rock engineering. When it subjected to continuous stress higher than its damage threshold, due the dislocation of particles mudstone crystals and expansion cracks, strength gradually damaged deteriorated strain increases, thus accelerating phenomenon creep damage. In order describe characteristics whole process aging deformation, based on evolution parameters (cohesion internal friction coefficient) with time tests, novel nonlinear viscoelastoplastic...

The deterioration of rock mechanical properties under chemical-freezing-thawing-loading will seriously threaten the stability and safety engineering mass, so study its constitutive model has very important theoretical application significance. In view deficiency that existing statistical damage cannot describe nonlinear characteristics compaction stage post-peak shape, index is introduced to measure stress-strain caused by iso-compression pores in rock, correction coefficient optimize shape...

The strain-softening and dilatancy behavior of soft rock is affected by the loading history development structure. This study regards as a structured overconsolidated soil develops new elastoplastic model based on classical super yield surface Cam-clay model. proposed capable capturing effect shape mechanical introducing function. validated against triaxial test results different types rocks under drained condition. comparison indicate that suitable for describing constitutive rock.

Abstract Glass fiber reinforced composites are widely used in storage tanks for corrosive liquids such as hydrochloric acid. In order to solve the leakage problem of a certain factory’s tanks. The type and failure region were located through investigation, sampling, mechanical testing. By considering specific conditions, boundary equivalent model was proposed derived from theory plates shells. It can locate measure cause accurately, without complex numerical modelling process. focusing on...

Under field conditions, the moisture content of rock changes with weather during prolonged creep. In order to investigate effect change on long-term shear strength and deformation behavior, a apparatus for intact was developed. Since three prefabricated holes are drilled in upper part sample, water injection device gas can be used inject into sample alternately test adjust without removing normal load load. By using silicone gasket seals box, fluid at pressure 5 MPa achieved leakage. Shear...

This paper develops a new statistic damage model for rock to mainly study the effect of loading rate on its mechanical behaviours. The proposed adopts rate‐dependent density function and is capable describing macroscopic accumulation process samples subjected external high‐speed dynamic loadings. can also account residual strength rocks by introducing modified equivalent strain principle, which considers contribution friction force rocks. generated movements nearby microcracks. predicted...

Abstract This paper firstly presents an implementation of the unified critical state model for CLAY and SAND, i.e., CASM, into finite difference method analysis platform FLAC 3D , via user defined constitutive models (UDM). The numerical is performed with implicit integration algorithm, validation conducted through a series triaxial drained undrained compression tests on normally consolidated clay, over-consolidated clay sand. Application to embankment loading analyzed demonstrate efficiency...

Soil-water retention properties and compressibility are closely related to the stability of geotechnical engineering structures made compacted soils. In present study, water curve a soil from Northern France was characterized using either suction control method or measurement. The results obtained showed good correspondence between two methods. Then, these experimental methods were used in oedometer compression test highlight factors influencing properties, especially terms changes index as...