Analysis of notch effect in load bearing capacity, apparent fracture toughness and fracture micromechanisms of ferritic–pearlitic steels

Cicero, Sergio; García, T.; Madrazo, V.; Carrascal, I.; Ruiz, Estela

doi:10.1016/j.engfailanal.2014.05.007

Cited by 11 publications

(9 citation statements)

References 34 publications

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“…It is also worth mentioning that

K_{c}^{N}

also depends on the specimen thickness, as has been demonstrated in previous works . Nevertheless, in this paper, the thickness scale effect is not considered to have any influence because the transversal geometry was kept constant throughout the experimental programme.…”

Section: Discussionmentioning

confidence: 85%

“…The analysis explained below gathers results obtained not only at temperatures within the ductile‐to‐brittle transition zone but also at the corresponding lower shelf . This is based on the fact that the fracture behaviour of notch conditions is more ductile than that observed under cracked conditions so that final fracture at lower shelf temperatures in notched specimens may be preceded by certain ductile behaviour, followed by final cleavage fracture with a single initiation point.…”

Section: Example Of Applicationmentioning

confidence: 99%

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Study of the influence of notch radii and temperature on the probability of failure: A methodology to perform a combined assessment

Muñiz‐Calvente

Álvarez-Vázquez

Cicero

et al. 2019

Fatigue Fract Eng Mat Struct

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The fracture assessment of notched components based on cracked components approaches leads to over‐conservative failure predictions. In the research literature, several approaches are proposed to overcome this problem using an apparent fracture toughness, KmatN. Nevertheless, most of these approaches are based on deterministic assumptions despite the large and variable scatter exhibited by KmatN for different notch radii (ρ) or temperatures (T). This paper proposes a methodology for deriving a probabilistic KmatN−ρ field including the effect of temperature on the failure of notched components. First, the theory of critical distances is applied to transform each apparent fracture toughness into the equivalent fracture toughness for ρ = 0. Then, the temperature is supposed to act as a scale effect in the Weibull cumulative distribution function of the equivalent fracture toughness, and the corresponding scale effect function is derived. Finally, the applicability of the proposed methodology is illustrated by an example using two ferritic‐pearlitic steels: S275JR and S355J2.

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“…It is also worth mentioning that

K_{c}^{N}

Section: Discussionmentioning

confidence: 85%

Section: Example Of Applicationmentioning

confidence: 99%

Study of the influence of notch radii and temperature on the probability of failure: A methodology to perform a combined assessment

Muñiz‐Calvente

Álvarez-Vázquez

Cicero

et al. 2019

Fatigue Fract Eng Mat Struct

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“…Here, it is sufficient to say that the 84 specimens cover 6 different notch radii, and three different temperatures belonging to the DBTZ (-10ºC, -30ºC and -50ºC). The material presents a ferritic-pearlitic microstructure [29].…”

Section: Methodsmentioning

confidence: 99%

“…The description of the experimental procedure may be found in [22]. The material presents a ferritic-pearlitic microstructure [29].…”

Section: Methodsmentioning

confidence: 99%

Structural integrity analysis of notched ferritic steels operating within their ductile-to-brittle transition zone: An approach from Failure Assessment Diagrams and the Notch Master Curve

Cicero

García

Madrazo

2015

Engineering Failure Analysis

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This paper provides a structural integrity assessment methodology for the analysis of ferritic steels containing notch-type defects and operating within their ductile-to-brittle transition zone. The methodology, based on the use of Failure Assessment Diagrams and the novel concept of the Notch Master Curve, has been applied to 323 experimental results performed on four different steels (S275JR, S355J2, S460M and S690Q), six different notch radii (from 0 mm up to 2.0 mm), two different types of specimens (CT and SENB), and three different temperatures within the corresponding ductile-to-brittle transition zone. The results validate the proposed assessment methodology.

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“…Thus, this material is in an analogous situation of Al7075T651. The basic fracture (CT specimens) and tensile characterisation of this material, and the corresponding experimental critical loads, may be consulted in [8,19,20,22]. The thickness and the width of the fracture specimens were 25 and 50 mm, respectively.…”

mentioning

confidence: 99%

Using the Equivalent Material Concept and the Average Strain Energy Density to Analyse the Fracture Behaviour of Structural Materials

2020

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This paper provides a complete overview of the applicability of the Equivalent Material Concept in conjunction with the Average Strain Energy Density criterion, to provide predictions of fracture loads in structural materials containing U-notches. The Average Strain Density Criterion (ASED) has a linear-elastic nature, so in principle, it does not provide satisfactory predictions of fracture loads in those materials with nonlinear behaviour. However, the Equivalent Material Concept (EMC) is able to transform a physically nonlinear material into an equivalent linear-elastic one and, therefore, the combination of the ASED criterion with the EMC (EMC–ASED criterion) should provide good predictions of fracture loads in physically nonlinear materials. The EMC–ASED criterion is here applied to different types of materials (polymers, composites and metals) with different grades of nonlinearity, showing the accuracy of the corresponding fracture load predictions and revealing qualitatively the limitations of the methodology. It is shown how the EMC–ASED criterion provides good predictions of fracture loads in nonlinear materials as long as the nonlinear behaviour is mainly limited to the tensile behaviour, and how the accuracy decreases when the nonlinear behaviour is extended to the material behaviour in the presence of defects.

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Analysis of notch effect in load bearing capacity, apparent fracture toughness and fracture micromechanisms of ferritic–pearlitic steels

Cited by 11 publications

References 34 publications

Study of the influence of notch radii and temperature on the probability of failure: A methodology to perform a combined assessment

Study of the influence of notch radii and temperature on the probability of failure: A methodology to perform a combined assessment

Structural integrity analysis of notched ferritic steels operating within their ductile-to-brittle transition zone: An approach from Failure Assessment Diagrams and the Notch Master Curve

Using the Equivalent Material Concept and the Average Strain Energy Density to Analyse the Fracture Behaviour of Structural Materials

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