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A probabilistic model for prediction of cleavage fracture

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V.I.Smirnov's research works

Predictions of the temperature dependence of cleavage fracture toughness are performed on the basis of the Master Curve approach and a probabilistic model for a 2CrNiMoV reactor pressure V.I.Smirnov's research worksPredictions of the temperature dependence of cleavage fracture toughness are performed on the basis of the Master Curve approach and a probabilistic model for a 2CrNiMoV reactor pressure The effect of ductile crack growth on the temperature May 01,2003 A probabilistic model for prediction of cleavage fracture#0183;Predictions of the temperature dependence of cleavage fracture toughness K JC cl (T) have been performed on the basis of a probabilistic model for cleavage fracture and a deterministic model for ductile fracture as applied to a 2CrNiMoV reactor pressure vessel steel in the initial (as-received) and embrittled states.

Some results are removed in response to a notice of local law requirement.For more information,please see here.Probabilistic prediction of the crack resistance of

On the basis of a new local probabilistic criterion of brittle fracture,a local criterion of ductile fracture proposed by the authors earlier,and the obtained approximate solution of the problem of stress-strain state near the crack tip,we develop a probabilistic model for the prediction of the crack resistance of pressure-vessel steels.The model enables one to predict the dependence of K Probabilistic prediction of the crack resistance of On the basis of a new local probabilistic criterion of brittle fracture,a local criterion of ductile fracture proposed by the authors earlier,and the obtained approximate solution of the problem of stress-strain state near the crack tip,we develop a probabilistic model for the prediction of the crack resistance of pressure-vessel steels.The model enables one to predict the dependence of K

Probabilistic cell modelling of cleavage fracture

Various aspects on probabilistic modelling of cleavage fracture are discussed.The investigation involves consideration of a unit cell with an explicitly modelled void.The results from this model are compared with results for the case when the void content is accounted for inProbabilistic Weibull Methodology for Fracture Prediction In this work,a three-parameter Weibull methodology for fracture prediction of brittle and ductile materials is presented.The approach proposed requires previous definition of the failure criterion to be applied.The parameter estimation is achieved for proportionally and non-proportionally increasing stresses.The case of two concurrent failure types is also handled.Previous123456NextA probabilistic model for the pearlite-induced cleavage of Brittle cleavage fracture is modelled in terms of the Beremin (1983) model,whereas the ductile crack advance preceding cleavage in the transition region is accounted for with the GTN model

Prediction of Temperature Dependence of Fracture

Using the Unified Curve method as proposed by the authors earlier and a probabilistic model based on the local approach and physical background of the influence of impurities and carbide size on the local strength of material,a method has been elaborated for predicting a variation of the temperature dependence of fracture toughness with neutron fluence.Prediction of Fracture Toughness of Reactor Pressure Using a probabilistic model and the Master curve approach,the temperature dependence of the brittle fracture toughness of reactor pressure-vessel steel 15Kh2NMFA in the initial state and highly embrittled state is predicted from the results of fracture toughness testing of a cracked Charpy-type specimen at a given temperature.A comparative analysis has shown that for the steel in the Prediction of Cleavage Fracture in the Ductile-to-Brittle Prediction of Cleavage Fracture in the Ductile-to-Brittle Transition Region of Pressure Vessel Steels A Probabilistic Model .Article Preview.Abstract This paper presents a modified Weibull stress model,which accounts for the effects of plastic strain and stress triaxiality at the crack tip region.The proposed model is applied to predict

Prediction of Cleavage Fracture in the Ductile-to-Brittle

Prediction of Cleavage Fracture in the Ductile-to-Brittle Transition Region of Pressure Vessel Steels A Probabilistic Model .Article Preview.Abstract This paper presents a modified Weibull stress model,which accounts for the effects of plastic strain and stress triaxiality at the crack tip region.The proposed model is applied to predict Prediction of Cleavage Fracture Probability for Ferritic Prediction of Cleavage Fracture Probability for Ferritic Steels in the Transition Region.Published 0 Format Pages Price The model provides a rationale for the different fracture behaviour of a material over the whole range of temperature,from fully stable J-R behaviour at high temperature down to brittle fracture under LEFM NAFEMS - Uncertainty Quantification and Probabilistic Risk The probabilistic risk assessments,such as the probability that the stress intensity factor exceeds the fracture toughness of the material for a given crack size,and the predictions of critical crack size and critical initial flaw size are being used to guide non-destructive evaluation requirements and potential development efforts.

Micromechanisms of Cleavage Fracture in HAZ of Low

The general objective of the present work is to study the brittle fracture of the coarsegrain heat-affected zone (CGHAZ) of a C-Mn steel.The target is to develop a probabilistic model for brittle prediction for the CGHAZ based on microstructural data.The model is based on local approach.In order to validate this model,fracture mechanical test specimens (3-point bend) have been tested at Micromechanical Prediction of Fracture Toughness for The probability of cleavage fracture is predicted by post-processing the finite element results using the Beremin model of cleavage fracture.Predictions are made of ductile tearing and cleavage fracture in test specimen and wide plate configurations of A533B steel for a range of temperatures.Failed rib region prediction in a human body model during cWe used a validated human body finite element model to study the predicted chest injury (focusing on rib fracture as a function of element strain) based on varying levels of simulated precrash braking.Furthermore,we compare deterministic and probabilistic methods of rib injury prediction in the computational model.

Cited by 53Publish Year 2004Author Martin Kroon,Jonas Faleskog,Hans A probabilistic model for prediction of cleavage fracture#214;bergA probabilistic model for cleavage fracture with a length

A probabilistic model for the cumulative probability of failure by cleavage fracture with a material related length scale is developed in this study.The model aims at describing the random nature of fracture in ferritic steels in the brittle-to-ductile transition temperature region.The model derives from use of an exponential function to describe the distribution of microstructural entities Cited by 53Publish Year 2004Author Martin Kroon,Jonas Faleskog,Hans A probabilistic model for prediction of cleavage fracture#214;bergA Weibull stress model to predict cleavage fracture in Dec 24,2001 A probabilistic model for prediction of cleavage fracture#0183;Xiaosheng Gao,Guihua Zhang,T.S.Srivatsan,A probabilistic model for prediction of cleavage fracture in the ductile-to-brittle transition region and the effect of temperature on model parameters,Materials Science and Engineering A,10.1016/j.msea.2005.09.098,415,1-2,Cited by 4Publish Year 2016Author Claudio RuggieriA probabilistic model for cleavage fracture with a length A recently proposed probabilistic model for the cumulative failure by cleavage was applied to the comprehensive sets of experimental data.This modified weakest link model incorporates a length scale,which together with a threshold stress reduce the scatter in predicted toughness distributions as well as introduces a fracture toughness

Cited by 24Publish Year 2006Author Xiaosheng Gao,Guihua Zhang,Tirumalai S.SrivatsanA probabilistic model for prediction of cleavage fracture

The cleavage fracture prediction is based on the probabilistic approach,considering the stress scatter in the carbides due to the mechanical fields heterogeneity related to the polycrystalline Application of a new cleavage fracture criterion for A new local criterion of cleavage fracture and its application are considered.Local criterion of cleavage fracture formulated in a probabilistic manner consists of cleavage microcrack nucleation condition and condition for their start and propagation through various barriers such as microstresses,grain and dislocation substructure boundaries.A probabilistic model including constraint and plastic Dec 01,2016 A probabilistic model for prediction of cleavage fracture#0183;Development of a probabilistic model within a multiscale methodology for cleavage fracture incorporating effects of plastic strain begins by assuming the fracture process zone (FPZ) in a stressed cracked body illustrated in Fig.1(a) in which a small volume element,V,is subjected to the principal stress, 1,and the effective plastic strain, p.

A probabilistic model for the pearlite-induced cleavage

tures.To explain the observed discrepancies a probabilistic model is developed by linking physical mechanisms of cleav-age with continuum mechanics analysis applied to fracture.The model assumes that cleavage is nucleated and triggered in pearlite within the blunting zone of the crack tip by the mechanism of Miller and Smith.A probabilistic model for the pearlite-induced cleavage of Brittle cleavage fracture is modelled in terms of the Beremin (1983) model,whereas the ductile crack advance preceding cleavage in the transition region is accounted for with the GTN model A probabilistic model for prediction of cleavage fracture Jan 15,2006 A probabilistic model for prediction of cleavage fracture#0183;2.Probabilistic treatment of cleavage fracture.Cleavage fracture can be simplified as a two-step process.At first the fine microscopic cracks are formed due to the inhomogeneous distribution of plastic deformation.In mild steels,the grain boundary carbide particles are the potential sites for the initiation of microscopic cracks ,,.The

A probabilistic model for cleavage fracture with a length

May 01,2008 A probabilistic model for prediction of cleavage fracture#0183;In a companion article ,a new probabilistic model for prediction of cleavage fracture was presented.This model has successfully been applied to experiments for stationary cracks ,and the main purpose with the present paper was to apply the model to experiments where ductile crack growth preceded failure by cleavage.Experiments were A probabilistic model for cleavage fracture with a length Jan 01,2004 A probabilistic model for prediction of cleavage fracture#0183;The probabilistic cleavage fracture model in Very good agreement between model predictions and experimental data was achieved by taking the length parameter L to be independent of temperature,which strengthened its interpretation of being a microstructural material length.A probabilistic model for cleavage fracture with a length A recently proposed probabilistic model for the cumulative failure by cleavage was applied to the comprehensive sets of experimental data.This modified weakest link model incorporates a length scale,which together with a threshold stress reduce the scatter in predicted toughness distributions as well as introduces a fracture toughness

A probabilistic model for cleavage fracture with a length

2008 (English) In Engineering Fracture Mechanics,ISSN 0013-7944,E-ISSN 1873-7315,Vol.75,no 8,p.2398-2417 Article in journal (Refereed) Published Abstract [en] A probabilistic model for the cumulative probability of failure by cleavage fracture was applied to experimental results where cleavage fracture was preceded by ductile crack growth.A probabilistic model for cleavage fracture with a length 2008 (English) In Engineering Fracture Mechanics,ISSN 0013-7944,E-ISSN 1873-7315,Vol.75,no 8,p.2398-2417 Article in journal (Refereed) Published Abstract [en] A probabilistic model for the cumulative probability of failure by cleavage fracture was applied to experimental results where cleavage fracture was preceded by ductile crack growth.A micromechanics based probabilistic model for cleavage The proposed model depends on six parameters,which are obtained for three temperatures in Paper D using experimental data from SE(B) tests.At the lowest temperature,-30 A probabilistic model for prediction of cleavage fracture#176; ,the model gives an excellent prediction of the cumulative failure probability by cleavage fracture and captures the threshold toughness and the experimental scatter.

A discussion on probabilistic aspects of Beremin's model

This work extends a micromechanics model for cleavage fracture incorporating effects of plastic strain to determine the reference temperature,,for an A515 Gr 65 pressure vessel steel based on a A Weibull stress model to predict cleavage fracture in Dec 24,2001 A probabilistic model for prediction of cleavage fracture#0183;This study applies recent advances in probabilistic modelling of cleavage fracture to predict the measured fracture behaviour of surface crack plates fabricated from an A51570 pressure vessel steel.Modifications of the conventional,twoparameter Weibull stress model introduce a nonzero,threshold parameter ( wmin ).A Probabilistic Treatment of Microstructural Effects on A probabilistic model has been developed for treating the effects of microstructural variation on the fatigue crack growth response of large cracks in structural alloys. and McClung,R.C,1992,Microstructure-Based Fatigue Life Prediction Methods for Naval Steel Structures, SwRI Report for Project No.06-4414,First Annual Report for

A Microstructure-Based Probabilistic Model for Cleavage in

Jul 23,2008 A probabilistic model for prediction of cleavage fracture#0183;Ortner,Susan R.A Microstructure-Based Probabilistic Model for Cleavage in RPV Steels. Proceedings of the ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference.Volume 6 Materials and Fabrication.Vancouver,BC,Canada. and several models use this as a basis for failure prediction.Fracture toughness data from a series of MnMoNi 12345Next(PDF) A probabilistic model for cleavage fracture with a A probabilistic model for the cumulative probability of failure by cleavage fracture with a material related length scale is developed in this study.(PDF) A probabilistic model for cleavage fracture with a A probabilistic model for the cumulative probability of failure by cleavage fracture with a material related length scale is developed in this study.

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