Evaluation of impacts of stress triaxiality on plastic deformability of RAFM steel using various types of tensile specimen

Kato, Taichiro; Ohata, Mitsuru; Nogami, Shuhei; Tanigawa, Hiroyasu

doi:10.1016/j.fusengdes.2015.11.003

Cited by 11 publications

(6 citation statements)

References 7 publications

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“…Moreover, the variation amplitude of fracture strain with initial stress triaxiality at the root position is much larger than that at the center position. Kato et al [3] obtained the relationship between the equivalent plastic strain and the stress triaxiality at the center position for ferritic/martensitic steel, and drew the conclusion that the fracture ductility at the center position decreased as the increase in stress triaxiality, which agrees well with the results of 316L in this work.…”

Section: Effect Of Stress Triaxiality On Fracture Ductilitysupporting

confidence: 88%

“…The three-factor-three-level including parameter boundary and level, is listed in Table 1 to determine the combinations of three parameters (ε N , s N and f N ). The comprehensive test of three parameters with three levels is 3 3 . The orthogonal test is used to reasonably arrange and analyze the multi-factor test, and the number of orthogonal experiments is only nine times.…”

Section: Fes Of Plastic Damage Evolutionmentioning

confidence: 99%

“…Stress triaxiality is a quantitative parameter to evaluate the stress constraint, which is an important factor to the plastic damage evolution and failure mode [1,2]. Kato et al [3] applied three kinds of miniature tensile specimen shapes to the investigation of plastic deformability, and found that the ductility and the plastic strain at the fracture position decreased with stress triaxiality increasing. As discussed by Ma et al [4], stress triaxiality and the Lode parameter greatly affected the development of void volume fraction.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Stress Triaxiality on Plastic Damage Evolution and Failure Mode for 316L Notched Specimen

Peng

Wang

Dai

et al. 2019

Metals

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To reveal the effect of stress triaxiality on plastic damage evolution and failure mode, 316L notched specimens with different notch sizes are systematically investigated by digital image correlation (DIC) observation, plastic damage analysis by finite element simulation, and void mesoscopic observation. It was found that the plastic damage evolution and failure mode are closely related with notch radius and stress triaxiality. The greater the stress triaxiality at the root is, the greater the damage value at the root is and the earlier the fracture occurs. Moreover, void distribution by mesoscopic observation agrees well with damage distribution observed by finite element simulation with the Gurson-Tvergaard-Needleman (GTN) damage model. It is worth noting that, with the increase in stress triaxiality, the failure mode of notched specimen changes from ductility fracture with void coalescence at the center position to crack initiation at the notch root, from both mesoscopic observation and damage simulation.

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Section: Effect Of Stress Triaxiality On Fracture Ductilitysupporting

confidence: 88%

Section: Fes Of Plastic Damage Evolutionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Stress Triaxiality on Plastic Damage Evolution and Failure Mode for 316L Notched Specimen

Peng

Wang

Dai

et al. 2019

Metals

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“…In this study, we wanted to study the tensile strength of such sandwich-style notched tensile specimens. Additionally, Table 1 and 2 shows the properties that are applied to the different sandwich-style notched tensile specimens to perform a simulation analysis [11][12].…”

Section: Research Methods and Modelsmentioning

confidence: 99%

A study on the sandwich-style notched tensile specimens for different materials through a simulation analysis

Lee¹,

Cho²

2018

IJET

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Background/Objectives: This study designed a model that used the sandwich-style notched tensile specimens of the same specifications by applying to the properties of CFRP, stainless steel, and aluminum, and performed a test simulation.Methods/Statistical analysis: The study used CATIA design software to perform the 3D modeling of the sandwich-style notched tensile specimens with the properties of CFRP, a composite material, and stainless steel and aluminum, both ordinary metals, and then, performed a tensile test simulation.Findings: By designing the sandwich-style notched tensile specimens of the same specifications and performing a test simulation, we were able to verify the tensile strength and durability of the specimens for the different materials. This study result showed that unlike the specimens for the ordinary metals, those specimens with the properties of the composite material of CFRP first showed maximum load instead of breaking immediately due to the fibers in CFRP, before they resisted displacement in response to the alternately increasing and decreasing load until it fractured. To be specific, we saw that the CFRP specimens had the more excellent tensile strength and durability.Improvements/Applications: The data obtained from the studies will serve as the basic data for studies on the composite materials like CFRP and other various materials.

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“…It was discovered that for both sub-size notched specimens and standard specimens more stress triaxiality lead to fracture at lower strain. 170…”

Section: Tensile Testingmentioning

confidence: 99%

Small specimen techniques for estimation of tensile, fatigue, fracture and crack propagation material model parameters

Kazakeviciute

Rouse

Focatiis

et al. 2021

The Journal of Strain Analysis for Engineering Design

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Small specimen mechanical testing is an exciting and rapidly developing field in which fundamental deformation behaviours can be observed from experiments performed on comparatively small amounts of material. These methods are particularly useful when there is limited source material to facilitate a sufficient number of standard specimen tests, if any at all. Such situations include the development of new materials or when performing routine maintenance/inspection studies of in-service components, requiring that material conditions are updated with service exposure. The potentially more challenging loading conditions and complex stress states experienced by small specimens, in comparison with standard specimen geometries, has led to a tendency for these methods to be used in ranking studies rather than for fundamental material parameter determination. Classifying a specimen as ‘small’ can be subjective, and in the present work the focus is to review testing methods that utilise specimens with characteristic dimensions of less than 50 mm. By doing this, observations made here will be relevant to industrial service monitoring problems, wherein small samples of material are extracted and tested from operational components in such a way that structural integrity is not compromised. Whilst recently the majority of small specimen test techniques development have focused on the determination of creep behaviour/properties as well as sub-size tensile testing, attention is given here to small specimen testing methods for determining specific tensile, fatigue, fracture and crack growth properties. These areas are currently underrepresented in published reviews. The suitability of specimens and methods is discussed here, along with associated advantages and disadvantages.

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Evaluation of impacts of stress triaxiality on plastic deformability of RAFM steel using various types of tensile specimen

Cited by 11 publications

References 7 publications

Effect of Stress Triaxiality on Plastic Damage Evolution and Failure Mode for 316L Notched Specimen

Effect of Stress Triaxiality on Plastic Damage Evolution and Failure Mode for 316L Notched Specimen

A study on the sandwich-style notched tensile specimens for different materials through a simulation analysis

Small specimen techniques for estimation of tensile, fatigue, fracture and crack propagation material model parameters

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