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Effect of undercut on the lower bound stability of vertical rock escarpment using finite element and

Shuvankar DAS; Debarghya CHAKRABORTY

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 8, Pages 1040-1055 doi: 10.1007/s11709-022-0841-1

Abstract: In the present study, the stability of a vertical rock escarpment is determined by considering the influenceis applied to incorporate the failure of rock mass with the help of the Generalized Hoek-Brown yield criterionThe change in stability due to the presence of undercut is expressed in terms of a non-dimensional stabilityThe obtained results indicate that undercut can cause a severe stability problem in rock mass havingdeveloped design equation as well as design charts can be useful for practicing engineers to determine the stability

Keywords： undercut vertical escarpment stability Hoek-Brown yield criterion PCP

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MIMO-GPC Stability Analysis Based on Frequency Domain

Sun Qinglin,Chen Zengqiang,Yuan Zhuzhi

Strategic Study of CAE 2004, Volume 6, Issue 10, Pages 39-44

Abstract:

A MIMO-GPC stability theorem based on frequency domain is presented in the paper.Nyquist array methodology is used to analyze the stability of MIMO-GPC.The parameters of MIMO-GPC can be determined by stability criterion.

Keywords： MIMO-GPC frequency domain analysis stability criterion

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LSSVM-based approach for refining soil failure criteria and calculating safety factor of slopes

Shiguo XIAO; Shaohong LI

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 7, Pages 871-881 doi: 10.1007/s11709-022-0863-8

Abstract: practical soil mass are very complex, and have significant influence on the safety factor of slope stabilityThe Coulomb strength criterion and the power-law failure criterion are classically simplified.strength test data of the soil, which is of more extensive applicability to many problems of slope stabilityis better than those of the linear Coulomb criterion and nonlinear power-law criterion.can be used to calculate the safety factor of three-dimensional slope stability.

Keywords： slope stability safety factor failure criterion least square support vector machine

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Deformation control criterion of shield tunnel under lateral relaxation of soft soil

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 5, Pages 780-795 doi: 10.1007/s11709-023-0944-3

Abstract: Subsequently, a deformation control criterion is established.

Keywords： shield tunnel lateral relaxation of soil deformation control criterion of segment structure model

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Experimental research on ductile fracture criterion in metal forming

Song YU, Weiming FENG

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 3, Pages 308-311 doi: 10.1007/s11465-011-0233-z

Abstract:

Ductile fracture criterion is key limitation parameter in material forming.providing the experimental values of the critical values at fracture, and 11 widely used ductile fracture criterion

Keywords： ductile fracture criteria metal forming process material experiment stress triaxiality

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A new fracture criterion for peridynamic and dual-horizon peridynamics

Jinhai ZHAO, Hesheng TANG, Songtao XUE

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 4, Pages 629-641 doi: 10.1007/s11709-017-0447-1

Abstract: A new fracture criterion based on the crack opening displacement for peridynamic (PD) and dual-horizonThe performance of the new fracture criterion is demonstrated by four examples, i.e. a bilateral crack

Keywords： Castigliano’s theorem breaking energy critical extension XFEM COD PD-COD

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Predication of Potential Danger Region (Zone) of Coal and Gas Outburst

Xian Xuefu,Xu Jiang,Wang Hongtu

Strategic Study of CAE 2001, Volume 3, Issue 2, Pages 39-46

Abstract: coal-rock composite samples and coal simples containing gas under complex stress state, the failure criterionconsummation of the Dracker - Prager´s theory, is set up, and the formulas computing the coefficient of stability

Keywords： dynamical phenomenon in mine coal and gas outburst potential danger zone failure criterion coefficientof stability density of elastic energy

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Research of the Damage Evolution Equation and Spallation Criterion

Cao Jiedong,Li Yongchi

Strategic Study of CAE 2006, Volume 8, Issue 1, Pages 40-45

Abstract: the experimental ones, the material parameters in the damage evolution equation and the spallation criterionresults and the experimental ones show that the new form of damage evolution equation and the spallation criterion

Keywords： damage evolution equation spallation criterion numerical simulation

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Shock Tensile Behaviour of Tungsten Alloy and Presentations to Its Constitutive Models and Fracture Criterion

Zhang Baoping,Ding Chuntong,Liu Baohua,Chen Xuelian

Strategic Study of CAE 2003, Volume 5, Issue 3, Pages 44-50

Abstract: and the plastic work W₁ at the maximum load-onset of instability was derived, so that the criterion

Keywords： constitutive model for dynamic tension tungsten alloy criterion to dynamic failure

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Solvates and polymorphs of clindamycin phosphate: Structural, thermal stability and moisture stability

Junbo Gong, Dejiang Zhang, Yuanyuan Ran, Keke Zhang, Shichao Du

Frontiers of Chemical Science and Engineering 2017, Volume 11, Issue 2, Pages 220-230 doi: 10.1007/s11705-017-1624-4

Abstract: Clindamycin phosphate (CP), an antibacterial agent, has been reported to form several solid-state forms. The crystal structures of two CP solvates, a dimethyl sulfoxide (DMSO) solvate and a methanol/water solvate (solvate V), have been determined by single crystal X-ray diffraction. The properties and transformations of these forms were characterized by powder X-ray diffraction, Single-crystal X-ray diffraction, differential scanning calorimetry, thermo gravimetric analysis, hot-stage microscopy, and dynamic vapor sorption. Very different hydrogen bonding networks exist among the host-host and host-solvent molecules in the two crystal structures, resulting in different moisture stabilities. The thermal stabilities of the two solvates upon heating and desolvation were also studied. When the temperature was above the boiling point of methanol, solvate V converted to a polymorphic phase after a one step desolvation process, whereas the desolvation temperature of the DMSO solvate was below the boiling point of DMSO. At the relative humidity above 43%, the DMSO solvate transformed to a hydrate at 25 °C. In contrast, solvate V did not transform at any of the humidities studied.

Keywords： clindamycin phosphate solvate crystal structure thermal stability moisture stability

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Evaluation and prediction of slope stability using machine learning approaches

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4, Pages 821-833 doi: 10.1007/s11709-021-0742-8

Abstract: In this paper, the machine learning (ML) model is built for slope stability evaluation and meets the

Keywords： slope stability factor of safety regression machine learning repeated cross-validation

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The Model for Loan Portfolio With Safety-first Criterion

Tang Wansheng,Yan Weizhen,Ning Yufu

Strategic Study of CAE 2007, Volume 9, Issue 11, Pages 137-141

Abstract:

This paper proposes the model for loan portfolio under probability criterion

Keywords： loan portfolio safety-first criterion random simulation genetic algorithm(GA) simultaneousperturbation

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Modified Bishop method for stability analysis of weakly sloped subgrade under centrifuge model test

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3, Pages 727-741 doi: 10.1007/s11709-021-0730-z

Abstract: The accuracy of traditional slice methods for computing the stability safety factor of weakly slopedIn this study, a novel modified Bishop method was developed to improve the accuracy of the stability

Keywords： weakly sloped subgrade stability analysis additional force influential force modified Bishop method

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The Strict Avalanche Criterion of Order k Spectral Properties of m-Valued Logical Functions

Guojinhui,LiShiqu

Strategic Study of CAE 2005, Volume 7, Issue 12, Pages 45-48

Abstract: In this paper, in residue class ring Z_m, the concept of the strict avalanche criterion ofand sufficient condition on a m-valued logical function is given, which fulfills the strict avalanche criterion

Keywords： m-valued logical function Chrestenson cyclic spectrum auto-correlation function the strict avalanche criterion

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Effect of cutterhead configuration on tunnel face stability during shield machine maintenance outages

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 4, Pages 522-532 doi: 10.1007/s11709-023-0930-9

Abstract: Engineering safety during maintenance outages is determined by the stability of the tunnel face.Disregarding the supporting effect of the cutterhead will result in a tunnel face with underestimated stability

Keywords： tunnel face stability cutterhead configuration aperture ratio pressure gradient support ratio