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Demonstration of the Principle of Interaction between Plastic Volume Strain and Shear for Rock and Soil

Wang Jingtao

Strategic Study of CAE 2006, Volume 8, Issue 9, Pages 24-29

Abstract:

The paper proposed a principle of interaction between plastic volume strains of and shear for rockand soil.Especially, the manners of the interaction between plastic volume strain and shear strain, the directeffect of plastic volume strain on the resistance to shear, the conditions of generating contractionand shear and its verification, and the fact that the critical state is a pure shearing process, in

Keywords： principle of interaction between plastic volume strain and shear strain for rock and soil constitutiverelation of rock and soil pressure-sensitivity dilatancy

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Fictitious soil pile model for dynamic analysis of pipe piles under high-strain conditions

Frontiers of Structural and Civil Engineering Pages 915-934 doi: 10.1007/s11709-023-0907-8

Abstract: A fictitious soil pile (FSP) model is developed to simulate the behavior of pipe piles with soil plugsundergoing high-strain dynamic impact loading.The developed model simulates the base soil with a fictitious hollow pile fully filled with a soil plugand soil plug is considered.The motions of the pile−soil system are solved by discretizing them into spring-mass model based on the

Keywords： fictitious soil pile soil plug pipe piles high-strain dynamic analysis one-dimensional wave theory

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Stress-strain relationship with soil structural parameter of collapse loess

SHAO Shengjun, YU Qinggao, LONG Jiyong

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 3, Pages 293-293 doi: 10.1007/s11709-008-0100-0

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Stress-strain relationship with soil structural parameters of collapse loess

SHAO Shengjun, LONG Jiyong, YU Qinggao

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 2, Pages 151-160 doi: 10.1007/s11709-008-0020-z

Abstract: the tri-axial shearing tests of unsaturated intact loess and based on the concept of comprehensive soilstructural potential, this paper reveals the changing laws of soil structural property under the tri-axialstructural parameters, whereby reflecting the effects of unsaturated loess water content, stress and strainstress-strain relation.Through the comparative analysis, the stress-strain curves described by the constitutive relationship

Keywords： hardening shearing expansion unsaturated structural property mathematical expression

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Effect of loading rate on shear strength parameters of mechanically and biologically treated waste

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 12, doi: 10.1007/s11783-022-1595-7

Abstract:

● Mechanical behavior of MBT waste affected by loading rate was investigated.

Keywords： Mechanically and biologically treated waste Landfill Triaxial test Loading rate Axial strain Shear

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Damage detection in beam-like structures using static shear energy redistribution

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 12, Pages 1552-1564 doi: 10.1007/s11709-022-0903-4

Abstract: In this study, a static shear energy algorithm is presented for the damage assessment of beam-like structuresAccording to the energy release principle, the strain energy of a damaged element suddenly changes whenTherefore, the change in the static shear energy is employed to determine the damage locations in beam-likeThe static shear energy is derived from the spectral factorization of the elementary stiffness matrixThe advantage of using shear energy as opposed to total energy is that only a few deflection data points

Keywords： damage detection beam structure strain energy static displacement variation energy damage index

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Numerical simulation of the rockburst processes of a circular tunnel at different dilation angles

Wang Xuebin,Pan Yishan,Zhang Zhihui

Strategic Study of CAE 2010, Volume 12, Issue 2, Pages 40-46

Abstract: For rock elements exhibiting linear strain-softening behavior beyond the occurrence of failure and thenFirstly, a hydrostatic pressure is applied to the plane strain model until a static equilibrium stateResults show that with an increase of the dilation angle, the shear band becomes wider; the dog-ear or, the angle between a shear band and the tangential line of the tunnel surface is higher.The present numerical results about the shear band inclination are consistent with the Roscoe and Arthur

Keywords： dilation angle circular tunnel rockburst shear band V-shaped notch shear strain volumetric strain

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Concepts and implementation of strain-based criteria in design codes for steel structures

Reidar BJORHOVDE

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 3, Pages 210-216 doi: 10.1007/s11709-012-0165-7

Abstract: If stresses or forces are needed, these are easily determined by the value of the strain and the relevant

Keywords： steel stress-strain characteristics tension test strain design actual behavior improved design codes

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Ensemble unit and AI techniques for prediction of rock strain

Pradeep T; Pijush SAMUI; Navid KARDANI; Panagiotis G ASTERIS

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 7, Pages 858-870 doi: 10.1007/s11709-022-0831-3

Abstract: The behavior of rock masses is influenced by a variety of forces, with measurement of stress and strainThe laboratory test for determining strain at each location within rock samples is expensive and difficultbut rock strain data are important for predicting failure of rock material.Additionally, the ensemble unit (EnU) may be utilized to evaluate rock strain.strain.

Keywords： prediction strain ensemble unit rank analysis error matrix

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Full-field dynamic strain reconstruction of an aero-engine blade from limited displacement responses

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 1, doi: 10.1007/s11465-022-0731-1

Abstract: Blade strain distribution and its change with time are crucial for reliability analysis and residualTraditional strain measurements are achieved by strain gauges (SGs) in a contact manner at discrete positionsThis study proposes a method of full-field and real-time strain reconstruction of an aero-engine bladeLimited optical measured displacement responses are utilized to reconstruct the full-field strain.The full-field strain distribution is in-time visualized.

Keywords： aero-engine blade displacement response dynamic strain reconstruction mode shape strain gauge

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Strain and process engineering toward continuous industrial fermentation

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 10, Pages 1336-1353 doi: 10.1007/s11705-022-2284-6

Abstract: Most current biotechnology industries are based on batch or fed-batch fermentation processes, which often show low productivity and high production costs compared to chemical processes. To increase the economic competitiveness of biological processes, continuous fermentation technologies are being developed that offer significant advantages in comparison with batch/fed-batch fermentation processes, including: (1) removal of potential substrates and product inhibition, (2) prolonging the microbial exponential growth phase and enhancing productivity, and (3) avoiding repeated fermentation preparation and lowering operation and installation costs. However, several key challenges should be addressed for the industrial application of continuous fermentation processes, including (1) contamination of the fermentation system, (2) degeneration of strains, and (3) relatively low product titer. In this study, we reviewed and discussed metabolic engineering and synthetic biology strategies to address these issues.

Keywords： continuous fermentation productivity contamination strain degeneration metabolic engineering

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Behavior of steel fiber–reinforced high-strength concrete at medium strain rate

Chujie JIAO, Wei SUN, Shi HUAN, Guoping JIANG

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 2, Pages 131-136 doi: 10.1007/s11709-009-0027-0

Abstract: Impact compression experiments for the steel fiber–reinforced high-strength concrete (SFRHSC) at medium strainThe experimental results showed that, when the strain rate increased from threshold value to 90 s , theincreased about 30%, the elastic modulus of SFRHSC increased about 50%, and the increase in the peak strain

Keywords： steel fiber–reinforced high-strength concrete (SFRHSC) high strain rates split Hopkinson press bar (SHPB) strain rate hardening effects

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Vibration analysis of nano-structure multilayered graphene sheets using modified strain gradient theory

Amir ALLAHBAKHSHI,Masih ALLAHBAKHSHI

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 2, Pages 187-197 doi: 10.1007/s11465-015-0339-9

Abstract:

In this paper, for the first time, the modified strain gradient theory is used as a new size-dependentAfter obtaining the governing equations based on modified strain gradient theory via principle of minimum

Keywords： graphene van der Waals (vdW) force modi- fied strain gradient elasticity theory size effect parameter

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FEM-based strain analysis study for multilayer sheet forming process

Rongjing ZHANG,Lihui LANG,Rizwan ZAFAR

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 4, Pages 373-379 doi: 10.1007/s11465-015-0371-9

Abstract: To further explore the novel method, this study conducts a finite element method-based (FEM-based) strain

Keywords： finite element method (FEM) strain analysis multilayer sheet forming

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Stress-strain relationship of concrete in freeze-thaw environment

ZOU Chaoying, ZHAO Juan, LIANG Feng

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 2, Pages 184-188 doi: 10.1007/s11709-008-0029-3

Abstract: Afterwards these frozen-thawed specimens were tested on monotonic axial load; stress-strain testing curvesFinally, stress-strain theoretical curvilinear equations and correlated parameters relating to the loss

Keywords： stress-strain theoretical freeze-thaw capacity reference eighteen concrete