Search | Engineering

Subscribe Submit

Home Journals Focus Achievement Fronts About Us 中文版

Resource Type

Journal Article 89

Year

2023 5

2022 4

2021 8

2020 6

2019 9

2018 3

2017 3

2016 1

2015 7

2014 6

2013 6

2012 5

2011 4

2010 3

2009 3

2008 1

2007 4

2006 4

2005 2

2002 2

open ︾

Keywords

crack 10

concrete 5

XFEM 3

crack growth 3

crack propagation 3

crack initiation 2

crack width 2

extended finite element method 2

fatigue life 2

3-D cracks 1

30o-120o 1

J-integral 1

ANN 1

ANSYS 1

B grade steel 1

B-spline 1

BOA 1

C₄ photosynthesis 1

CO₂ capture 1

open ︾

Search scope:

排序： Display mode:

Fatigue crack initiation of magnesium alloys under elastic stress amplitudes: A review

B. J. WANG, D. K. XU, S. D. WANG, E. H. HAN

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 1, Pages 113-127 doi: 10.1007/s11465-018-0482-1

Abstract: Given their hexagonal close packed structure, the fatigue crack initiation of Mg and its alloys is closelyIn this paper, some fundamental aspects about the fatigue crack initiation mechanisms of Mg alloys arereviewed, including the 3 followings: 1) Fatigue crack initiation of as-cast Mg alloys, 2) influenceof microstructure on fatigue crack initiation of wrought Mg alloys, and 3) the effect of heat treatmentMoreover, some unresolved issues and future target on the fatigue crack initiation mechanism of Mg alloys

Keywords： Mg alloys fatigue behavior microstructure crack initiation deformation mechanism

HTML PDF Collect

Hierarchical approach for fatigue cracking performance evaluation in asphalt pavements

Ibrahim ONIFADE, Yared DINEGDAE, Björn BIRGISSON

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 3, Pages 257-269 doi: 10.1007/s11709-017-0410-1

Abstract: In this paper, a hierarchical approach is proposed for the evaluation of fatigue cracking in asphalt concrete pavements considering three different levels of complexities in the representation of the material behaviour, design parameters characterization and the determination of the pavement response as well as damage computation. Based on the developed hierarchical approach, three damage computation levels are identified and proposed. The levels of fatigue damage analysis provides pavement engineers a variety of tools that can be used for pavement analysis depending on the availability of data, required level of prediction accuracy and computational power at their disposal. The hierarchical approach also provides a systematic approach for the understanding of the fundamental mechanisms of pavement deterioration, the elimination of the empiricism associated with pavement design today and the transition towards the use of sound principles of mechanics in pavement analysis and design.

Keywords： fatigue cracking energy based crack initiation mechanistic approach pavement analysis

HTML PDF Collect

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 crackThis 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 crackinitiation and propagation.

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

HTML PDF Collect

Research on initiation network reliability of viaduct demolition blasting

Wu Xinxia,Zhao Gen,Xie Xianqi

Strategic Study of CAE 2014, Volume 16, Issue 11, Pages 72-77

Abstract:

_N_on_{-electric initiation system was the onlyinitiation system}_for_{viaduct blasting demolition.>_{the relay point c}_{haracteristic}_of_{multiple parallel detonator initiation}_R_{eliability standard for n}_on_{-electric initiation}_uplex-cross_n_on_-electric_initiation}

Keywords： viaduct demolition blasting initiation system reliability

HTML PDF Collect

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

HTML PDF Collect

hepatocellular carcinoma progression by repressing translation through the interaction with eukaryotic initiation

Frontiers of Medicine 2023, Volume 17, Issue 3, Pages 476-492 doi: 10.1007/s11684-022-0966-6

Abstract: tiRNA-Gln knockdown yielded opposite results. 5′-tiRNA-Gln exerted its function by binding eukaryotic initiationfactor 4A-I (EIF4A1), which unwinds complex RNA secondary structures during translation initiation,

Keywords： EIF4A1 G-quadruplex hepatocellular carcinoma tRNA-derived small RNA translation initiation

HTML PDF Collect

Liquid metal material genome: Initiation of a new research track towards discovery of advanced energy

Lei WANG, Jing LIU

Frontiers in Energy 2013, Volume 7, Issue 3, Pages 317-332 doi: 10.1007/s11708-013-0271-9

Abstract: As the basis of modern industry, the roles materials play are becoming increasingly vital in this day and age. With many superior physical properties over conventional fluids, the low melting point liquid metal material, especially room-temperature liquid metal, is recently found to be uniquely useful in a wide variety of emerging areas from energy, electronics to medical sciences. However, with the coming enormous utilization of such materials, serious issues also arise which urgently need to be addressed. A biggest concern to impede the large scale application of room-temperature liquid metal technologies is that there is currently a strong shortage of the materials and species available to meet the tough requirements such as cost, melting point, electrical and thermal conductivity, etc. Inspired by the Material Genome Initiative as issued in 2011 by the United States of America, a more specific and focused project initiative was proposed in this paper—the liquid metal material genome aimed to discover advanced new functional alloys with low melting point so as to fulfill various increasing needs. The basic schemes and road map for this new research program, which is expected to have a worldwide significance, were outlined. The theoretical strategies and experimental methods in the research and development of liquid metal material genome were introduced. Particularly, the calculation of phase diagram (CALPHAD) approach as a highly effective way for material design was discussed. Further, the first-principles (FP) calculation was suggested to combine with the statistical thermodynamics to calculate the thermodynamic functions so as to enrich the CALPHAD database of liquid metals. When the experimental data are too scarce to perform a regular treatment, the combination of FP calculation, cluster variation method (CVM) or molecular dynamics (MD), and CALPHAD, referred to as the mixed FP-CVM-CALPHAD method can be a promising way to solve the problem. Except for the theoretical strategies, several parallel processing experimental methods were also analyzed, which can help improve the efficiency of finding new liquid metal materials and reducing the cost. The liquid metal material genome proposal as initiated in this paper will accelerate the process of finding and utilization of new functional materials.

Keywords： liquid metal material genome energy material material discovery advanced material room-temperature liquid alloy thermodynamics phase diagram

HTML PDF Collect

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

HTML PDF Collect

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

HTML PDF Collect

Breast cancer-associated fibroblasts: their roles in tumor initiation, progression and clinical applications

Aixiu Qiao,Feng Gu,Xiaojing Guo,Xinmin Zhang,Li Fu

Frontiers of Medicine 2016, Volume 10, Issue 1, Pages 33-40 doi: 10.1007/s11684-016-0431-5

Abstract: increasing number of recent studies have analyzed the contribution of cancer microenvironment to the initiationCAFs not only facilitate the initiation, growth, angiogenesis, invasion, and metastasis of cancer but

Keywords： cancer-associated fibroblast breast cancer progression prognosis

HTML PDF Collect

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

HTML PDF Collect

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

HTML PDF Collect

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

HTML PDF Collect

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

HTML PDF Collect

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