The Experts below are selected from a list of 249 Experts worldwide ranked by ideXlab platform

Meibao Chen - One of the best experts on this subject based on the ideXlab platform.

  • Researches on the Fatigue Crack Propagation of Pipeline Steel
    Energy Procedia, 2012
    Co-Authors: Yurong Jiang, Meibao Chen
    Abstract:

    Abstract Researches and industrialization of pipeline steel Fatigue Crack propagation are summarized, especially the X60 and X70 pipeline steel after mechanical damage and in the synthetic soil solution. The results show that the Fatigue Crack propagation of the pipeline steel has the similar law after mechanical damage or in the synthetic soil solution. It is very clearly that the Fatigue Crack propagation is deeply depending on the ΔK, and there are all have threshold characters. The mechanical damage and the synthetic soil solution can increase the Fatigue Crack propagation rate, decrease the Fatigue Crack propagation threshold ΔKth, accelerate Crack propagation rate and shorten the service life of the pipe.

  • Researches on the Fatigue Crack propagation of pipeline steel
    Energy Procedia, 2012
    Co-Authors: Yurong Jiang, Meibao Chen
    Abstract:

    Researches and industrialization of pipeline steel Fatigue Crack propagation are summarized, especially the X60 and X70 pipeline steel after mechanical damage and in the synthetic soil solution. The results show that the Fatigue Crack propagation of the pipeline steel has the similar law after mechanical damage or in the synthetic soil solution. It is very clearly that the Fatigue Crack propagation is deeply depending on the ΔK, and there are all have threshold characters. The mechanical damage and the synthetic soil solution can increase the Fatigue Crack propagation rate, decrease the Fatigue Crack propagation threshold ΔKth, accelerate Crack propagation rate and shorten the service life of the pipe. © 2011 Published by Elsevier Ltd.

Yurong Jiang - One of the best experts on this subject based on the ideXlab platform.

  • Researches on the Fatigue Crack Propagation of Pipeline Steel
    Energy Procedia, 2012
    Co-Authors: Yurong Jiang, Meibao Chen
    Abstract:

    Abstract Researches and industrialization of pipeline steel Fatigue Crack propagation are summarized, especially the X60 and X70 pipeline steel after mechanical damage and in the synthetic soil solution. The results show that the Fatigue Crack propagation of the pipeline steel has the similar law after mechanical damage or in the synthetic soil solution. It is very clearly that the Fatigue Crack propagation is deeply depending on the ΔK, and there are all have threshold characters. The mechanical damage and the synthetic soil solution can increase the Fatigue Crack propagation rate, decrease the Fatigue Crack propagation threshold ΔKth, accelerate Crack propagation rate and shorten the service life of the pipe.

  • Researches on the Fatigue Crack propagation of pipeline steel
    Energy Procedia, 2012
    Co-Authors: Yurong Jiang, Meibao Chen
    Abstract:

    Researches and industrialization of pipeline steel Fatigue Crack propagation are summarized, especially the X60 and X70 pipeline steel after mechanical damage and in the synthetic soil solution. The results show that the Fatigue Crack propagation of the pipeline steel has the similar law after mechanical damage or in the synthetic soil solution. It is very clearly that the Fatigue Crack propagation is deeply depending on the ΔK, and there are all have threshold characters. The mechanical damage and the synthetic soil solution can increase the Fatigue Crack propagation rate, decrease the Fatigue Crack propagation threshold ΔKth, accelerate Crack propagation rate and shorten the service life of the pipe. © 2011 Published by Elsevier Ltd.

Steve Lambert - One of the best experts on this subject based on the ideXlab platform.

  • a study of the stress ratio effects on Fatigue Crack growth using the unified two parameter Fatigue Crack growth driving force
    International Journal of Fatigue, 2007
    Co-Authors: A H Noroozi, G Glinka, Steve Lambert
    Abstract:

    Abstract A unified two-parameter Fatigue Crack growth driving force model was developed to account for the residual stress and subsequently the stress ratio effect on Fatigue Crack growth. It was found that the driving force should be expressed as a combination of the maximum stress intensity factor, Kmax, and the stress intensity range, ΔK, corrected for the presence of the residual stress. As a result, the effects of residual stresses manifest themselves in changes of the applied maximum stress intensity factor and the applied stress intensity range. A two-parameter function of the maximum total stress intensity factor, Kmax,tot, and the total stress intensity range, ΔKtot, was proposed to model the Fatigue Crack growth rate data obtained at various R-ratios. Based on the analysis, the unified two-parameter driving force, Δ κ = K max,tot p Δ K tot ( 1 - p ) , was derived accounting for the mean stress or the stress ratio effect on Fatigue Crack propagation. It was shown that the two-parameter driving force, Δ κ = K max,tot p Δ K tot 0.5 , was capable of correlating Fatigue Crack growth data obtained under a wide range of load ratios and Fatigue Crack growth rates spanning from the near threshold to the high growth rate regime. The model was successfully verified using a wide range of Fatigue Crack growth data obtained for Al 2024-T351 aluminium alloy, St-4340 steel alloy and Ti–6Al–4V titanium alloy with load ratios, R, ranging from −1 to 0.7.

G. S. Wang - One of the best experts on this subject based on the ideXlab platform.

  • Stochastic Evaluation of Fatigue Crack Initiation and Propagation
    Fracture of Nano and Engineering Materials and Structures, 2020
    Co-Authors: G. S. Wang
    Abstract:

    Stochastic Fatigue Crack growth analyses have been performed using the experimental Fatigue Crack growth data obtained for the Cracks initiated from metallurgical inclusions at the notch of the specimen, the AGARD short Crack growth experimental data [1]. This investigation is not intended to analyse the feature of short Crack growth behaviour, but to analyse the effect of the inclusion distribution on the time that the Crack is initiated, and the consequent stochastic Fatigue Crack growth behaviour. The incremental stochastic Crack growth analysis based on FFT [2] (fast Fourier Transformation) and Monte Carlo simulation has been made according to a two step differential stochastic Fatigue Crack growth model which assumes that the Fatigue Crack growth consists of a rapid and slow pulse process. The Fatigue Crack growth is simulated from an initial flaw size, which is the inclusion size, to a large Crack size.

  • Analysing the Fatigue Crack growth in structural details
    Engineering Fracture Mechanics, 1996
    Co-Authors: G. S. Wang
    Abstract:

    A unified procedure is proposed to compute both the stress intensity factor (SIF) and the Fatigue Crack growth for part-through Cracks in complex structural details. This method is an extension of the approximate three-dimensional (3D) weight function (WF) method in solving both SIF and Fatigue Crack growth problems for complex structural details using only the stress distribution in perspective Crack sites. The Fatigue Crack growth analysis is based on the plastic deformation induced Crack closure mechanism which is determined according to the strip yielding model. Cycle-by-cycle Fatigue Crack growth predictions have been made based on Elber's Crack growth relation. The Fatigue Crack growth analysis is closely related to the cyclic stress experience, the configuration of structural detail, the applied load spectrum and the material property. The advantage and limitation of the method have been discussed. Some examples have been provided for the Fatigue Crack growth analyses for structural details of a Swedish fighter/attacker aircraft to demonstrate the methodology. This paper shows that an efficient, solid, unified theoretical frame can be established for reliable analyses of the Fatigue Crack growth in complex structural details for general engineering applications.

  • The plasticity aspect of Fatigue Crack growth
    Engineering Fracture Mechanics, 1993
    Co-Authors: G. S. Wang
    Abstract:

    Abstract A detailed analysis of the plasticity around a Fatigue Crack is performed based on the strip yield assumption and a boundary element treatment. The Green function for the boundary element treatment is based on the weight function theory. The theoretical framework to deal with the Fatigue Crack growth in a residual stress field is also established. A Crack tip reverse yielding concept is proposed to rationalize the Crack growth under cyclic loading. From this concept, most of the plastically induced Fatigue Crack growth phenomena can be satisfactorily explained.

A H Noroozi - One of the best experts on this subject based on the ideXlab platform.

  • a study of the stress ratio effects on Fatigue Crack growth using the unified two parameter Fatigue Crack growth driving force
    International Journal of Fatigue, 2007
    Co-Authors: A H Noroozi, G Glinka, Steve Lambert
    Abstract:

    Abstract A unified two-parameter Fatigue Crack growth driving force model was developed to account for the residual stress and subsequently the stress ratio effect on Fatigue Crack growth. It was found that the driving force should be expressed as a combination of the maximum stress intensity factor, Kmax, and the stress intensity range, ΔK, corrected for the presence of the residual stress. As a result, the effects of residual stresses manifest themselves in changes of the applied maximum stress intensity factor and the applied stress intensity range. A two-parameter function of the maximum total stress intensity factor, Kmax,tot, and the total stress intensity range, ΔKtot, was proposed to model the Fatigue Crack growth rate data obtained at various R-ratios. Based on the analysis, the unified two-parameter driving force, Δ κ = K max,tot p Δ K tot ( 1 - p ) , was derived accounting for the mean stress or the stress ratio effect on Fatigue Crack propagation. It was shown that the two-parameter driving force, Δ κ = K max,tot p Δ K tot 0.5 , was capable of correlating Fatigue Crack growth data obtained under a wide range of load ratios and Fatigue Crack growth rates spanning from the near threshold to the high growth rate regime. The model was successfully verified using a wide range of Fatigue Crack growth data obtained for Al 2024-T351 aluminium alloy, St-4340 steel alloy and Ti–6Al–4V titanium alloy with load ratios, R, ranging from −1 to 0.7.