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Crack evolution of soft–hard composite layered rock-like specimens with two fissures under uniaxial compression

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 6, Pages 1372-1389 doi: 10.1007/s11709-021-0772-2

Abstract: Acoustic emission and digital image correlation were used to study the spatiotemporal evolution characteristicsof crack extension of soft and hard composite laminated rock masses (SHCLRM) containing double fissurescharacteristics of the acoustic emission source location distribution, and frequency changes of the crackevolution process were also investigated.The first crack always sprouts at the tip or middle of prefabricated fractures in hard layers.

Keywords： soft−hard composite layered rock mass double cracks crack evolution acoustic emission digital image

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Cracking evolution behaviors of lightweight materials based on

Y. Luo, S. C. Wu, Y. N. Hu, Y. N. Fu

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 4, Pages 461-481 doi: 10.1007/s11465-018-0481-2

Abstract: and service of a critical component, leading researchers and engineers to thoroughly identifying the crackevolution.Third-generation synchrotron radiation X-ray computed microtomography can be used to detect the inner damage evolutionThis paper provides a brief review of studying the crack initiation and propagation inside lightweightinclusion, precipitate, etc.) or artificial defects (notch, scratch, pit, etc.) strongly affect the crack

Keywords： fatigue crack initiation and growth fatigue damage mechanism damage tolerance defect characterization

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Dynamic crack propagation in plates weakened by inclined cracks: an investigation based on peridynamics

A. SHAFIEI

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 4, Pages 527-535 doi: 10.1007/s11709-018-0450-1

Abstract: In this paper by using peridynamics, the crack path for inclined crack under dynamic loading were investigatedThe peridynamics solution for this problem represents the main features of dynamic crack propagationsuch as crack bifurcation.In addition, the influence of geometry on inclined crack growth is studied.

Keywords： peridynamics inclined crack dynamic fracture crack branching

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Peridynamics versus XFEM: a comparative study for quasi-static crack problems

Jinhai ZHAO, Hesheng TANG, Songtao XUE

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 4, Pages 548-557 doi: 10.1007/s11709-017-0434-6

Abstract: However, capturing of complex mixed-mode crack patterns has been proven to be difficult with PD.extended finite element method (XFEM) is one of the most popular methods for fracture which allows crackThe first example is crack propagation in a double notched specimen under uniaxial tension with differentcrack spacings in loading direction.

Keywords： XFEM peridynamic bilateral crack parallel double cracks nonlocal theory

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Correlation between tension softening relation and crack extension resistance in concrete

Xiufang ZHANG , Shilang XU ,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 3, Pages 323-329 doi: 10.1007/s11709-009-0041-2

Abstract: Changes of the material fracture energy consumption with crack propagation can be described by a crackextension resistance curve, one of the fundamental fracture criteria in crack mechanics.observation of the fracture behavior in concrete was used to develop a new fracture criterion, the crackextension resistance curve, to analyze crack propagation during the entire concrete fracture processfracture process zone ahead of the stress-free crack tip.

Keywords： concrete fracture process zone crack extension G_R resistance tension softening curve

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Fracture resistance on aggregate bridging crack in concrete

ZHANG Xiufang, XU Shilang

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 1, Pages 63-70 doi: 10.1007/s11709-007-0006-2

Abstract: Utilizing the obtained load against crack opening displacement curve, the value of G at any crack extensionas well as the change of G with the crack extension is examined.It is found that G will firstly increase with the development of crack and then stay constant once theinitial crack tip opening displacement reaches the characteristic crack opening displacement w0.The results reveal that the values of G of different specimens at any crack propagation are strongly

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Stability and dynamics of rotor system with 45° slant crack on shaft

Yanli LIN, Xiaohui SI, Fulei CHU

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 2, Pages 203-213 doi: 10.1007/s11465-011-0131-4

Abstract:

Crack on a shaft is one of the common damages in a rotor system.slant crack on the rotor system.is larger than that with a transverse crack when the two types of crack have the same depth and thetorsional excitation are analyzed by considering opening and closing of the crack.on a shaft and can be used for the detection of the slant crack on a shaft.

Keywords： rotor dynamics slant crack stability torsional excitation open and close

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Study on the cohesion and adhesion of hot-poured crack sealants

Meng GUO, Yiqiu TAN, Xuesong DU, Zhaofeng LV

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 3, Pages 353-359 doi: 10.1007/s11709-017-0400-3

Abstract: Filling crack sealant is a main method to repair cracking of pavement.The cohesion and adhesion of crack sealant directly determine its service performance and durability.This research proposed two methods to evaluate cohesion and adhesion of crack sealant, and analyzed theThe effect of moisture on low-temperature performance of crack sealant was also be evaluated by conductingfor 24 hours will decrease the failure energy of low-temperature tension and damage the durability of crack

Keywords： crack sealant concrete pavement cohesion adhesion moisture damage

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Feasibility of crack free reinforced concrete bridge deck from materials composition perspective: a state

Mahdi AREZOUMANDI

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 1, Pages 91-103 doi: 10.1007/s11709-015-0274-1

Abstract: To design an appropriate mixture for crack free bridge deck, it is important to study previous researches

Keywords： bridge deck crack fiber shrinkage shrinkage reducing admixture

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Concurrent fatigue crack growth simulation using extended finite element method

Zizi LU, Yongming LIU,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 3, Pages 339-347 doi: 10.1007/s11709-010-0078-2

Abstract: In this paper, a concurrent simulation framework for fatigue crack growth analysis is proposed usingscale model for fatigue mechanism analysis and the extended finite element method (X-FEM) for fatigue crackThe X-FEM greatly facilitates crack growth simulation without remeshing requirements ahead of the cracktime scale fatigue model is integrated into the numerical simulation algorithm for concurrent fatigue crack

Keywords： small time scale model extended finite element method (X-FEM) crack growth multiaxial

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Some remarks on the engineering application of the fatigue crack growth approach under nonzero mean loads

Jorge Alberto Rodriguez DURAN,Ronney Mancebo BOLOY,Rafael Raider LEONI

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 3, Pages 255-262 doi: 10.1007/s11465-015-0342-1

Abstract:

The well-known fatigue crack growth (FCG) curves are two-parameter dependents.the mathematical representation of these curves should be integrated between the initial and final crackK is almost always selected and, in these conditions, considered as the crack driving forceNumerical examples of crack growth analysis for cracks growing under nominal stresses of constant amplitudeThe resulting curves of crack size versus number of cycles (a vs.

Keywords： fatigue crack propagation modeling life prediction mean stress effects

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Stress field near circular-arc interface crack tip based on electric saturation concept

Longchao DAI, Xinwei WANG

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 3, Pages 320-325 doi: 10.1007/s11465-009-0042-9

Abstract: the framework of nonlinear electroelasticity, the anti-plane problem of a circular-arc interfacial crackthe complex potentials in both the matrix and the inclusion, and the stress intensity factor at the crack

Keywords： piezoelectric material arc crack strip saturation stress intensity factor

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Crack propagation with different radius local random damage based on peridynamic theory

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 5, Pages 1238-1248 doi: 10.1007/s11709-021-0695-y

Abstract: Drawing from the advantages of Classical Mechanics, the peridynamic theory can clarify the crack propagationmechanism by an integral solution without initially setting the factitious crack and crack path.Moreover, to study the effects of local stochastic damage with different radii on the crack propagationand Y-direction displacement, a comparison and contact methodology was adopted, in which the crack

Keywords： peridynamics stochastic damage bilateral notch crack

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Calculation of Cohesive Stress Along the Fictitious Crack Zone in Concrete Materials

Xu Shilang,Wang Limin

Strategic Study of CAE 2002, Volume 4, Issue 5, Pages 53-58

Abstract: Based upon concrete fracture properties and the analytical model of crack with cohesive forces, two simpleAs a result, using the test data of crack opening displacement, the cohesive stress distribution is determined

Keywords： concrete crack opening displacement fictitious crack cohesive force algebra equations

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Frost heave and freezing processes of saturated rock with an open crack under different freezing conditions

Zhitao LV, Caichu XIA, Yuesong WANG, Ziliang LIN

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 4, Pages 947-960 doi: 10.1007/s11709-020-0638-z

Abstract: Frost heave experiments on saturated sandstone and tuff with an open crack are conducted under uniformFrost heave of crack in sandstone with high permeability is more significant under uniform freezing conditionHowever, frost heave of crack in tuff with low permeability is more significant under unidirectionalconsidering the latent heat of pore water and water in crack is proposed and confirmed to be reliableHowever, the migration path of water in crack to the unfrozen rock under freezing front exists under

Keywords： frost heave rock with crack freezing process freezing condition frost heave mode