Loading rate effects on cleavage fracture of pre-cracked CVN specimens: 3-D studies

Koppenhoefer, Kyle C.; Dodds, Robert H.

doi:10.1016/s0013-7944(97)00076-3

Cited by 22 publications

(6 citation statements)

References 23 publications

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“…+20 MPaǰm (9) where N denotes the total number of specimens tested (censored and uncensored) with r the number of uncensored tests (six minimum). The median toughness at the test temperature follows simply as…”

Section: T Equivalent Values By Calibration Of Weibull Parameters Usmentioning

confidence: 99%

“…These are comation. Estimate K 0 (at −7°C) for the constraintputed using P i =(i−0.3)/(N+0.4), where i denotes the corrected distribution using Eqs (8) and (9), and rank number and N defines the total number of fracture denote it as K B 0 . tests.…”

Section: T Equivalent Values By Calibration Of Weibull Parameters Usmentioning

confidence: 99%

“…Recent efforts in this area have focused on developing transferability models for cleavage fracture toughness. Bakker and Koers 6 Minami et al 7 Ruggieri et al 8 and Koppenhoefer and Dodds 9 assess the effects of specimen thickness, crack length and loading rate on elastic–plastic fracture toughness. Ruggieri and Dodds, 10 Xia and Shih, 11 Xia and Cheng 12 and Gao et al 13 generalize the Weibull stress for stationary and growing cracks to include the coupled effects of constraint loss and ductile tearing on J c ‐values.…”

Section: Introductionmentioning

confidence: 99%

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A Weibull stress model to predict cleavage fracture in plates containing surface cracks

Gao

Tregoning

et al. 1999

Fatigue Fract Eng Mat Struct

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This study applies recent advances in probabilistic modelling of cleavage fracture to predict the measured fracture behaviour of surface crack plates fabricated from an A515‐70 pressure vessel steel. Modifications of the conventional, two‐parameter Weibull stress model introduce a non‐zero, threshold parameter (σw‐min ). The introduction of σw‐min brings numerical predictions of scatter in toughness data into better agreement with experimental measurements, and calibration of this new parameter requires no additional experimental data. The Weibull modulus (m) and scaling parameter (σu ) are calibrated using a new strategy based on the toughness transferability model, which eliminates the non‐uniqueness that arises in calibrations using only small‐scale yielding toughness data. Here, the Weibull stress model is calibrated using toughness data from deep‐notch C(T) and shallow‐notch SE(B) specimens, and is then applied to predict the measured response of surface crack plates loaded in different combinations of tension and bending. The model predictions accurately capture the measured distributions of fracture toughness values.

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Section: T Equivalent Values By Calibration Of Weibull Parameters Usmentioning

confidence: 99%

Section: T Equivalent Values By Calibration Of Weibull Parameters Usmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Weibull stress model to predict cleavage fracture in plates containing surface cracks

Gao

Tregoning

et al. 1999

Fatigue Fract Eng Mat Struct

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“…Dodds Jr. et al [8][9][10][11] suggested a simple toughness scale method (TSM). Since this method couples the ASTM E1921 procedure with the Weibull stress model, it is possible to correlate K Jc xT and K Jc 1T via Weibull stress.…”

Section: Concept Of Fracture Toughness Diagrammentioning

confidence: 99%

Correction of constraint loss in fracture toughness measurement of PCVN specimens based on fracture toughness diagram

et al. 2010

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The aim of this paper is to suggest an approach to generate master curves by using miniature specimens, especially pre-cracked Charpy V-notched (PCVN) specimen, made of SA508 carbon steel. Firstly, fracture toughness diagram is derived from comparing finite element analyses results with the fixed mesh size at crack tip between standard compact tension and PCVN specimens. To compensate the constraint effects from different geometry, further examination based on the fracture toughness diagram was performed. In this context, a scale factor to deal with specimen size effects is proposed by statistically manipulating the numerical analysis data. Finally, the proposed scale factor is applied to calculate reference temperature which affects on the master curve. We expect that the approach can be applicable to compensate the geometrical constraint effects on fracture toughness of SA508 carbon steel when the PCVN specimen is used.

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“…D. M. Norris [88] konnte zeigen, dass Risseinleitung nach 40% der bis zur Maximalkraft erforderlichen Zeit eintritt und dabei nur 10% der gesamten Schlagenergie verbraucht wird. Eine 3D-Simulation seitengekerbter Kerbschlagproben mit Ermu Èdungsanriss fu Èhrte zu dem Ergebnis, dass im unteren Teil des U È bergangsbereiches ein ebener Verformungszustand (plane strain) mit der dadurch bedingten starken constraint-Wirkung vorliegt [89]. Fu Èr einen Druckbeha Èlterstahl wurde das Maximum der Verformungsbehinderung in Kerbschlagproben bei der Temperatur T 27J und in SENB-Proben mit 25 mm Dicke bei T KIC100 gefunden [90], was die oben angefu Èhrte empirische Beziehung zwischen den beiden Temperaturkriterien rechtfertigt.…”

Section: Werkstoffmechanische Interpretation Des Kerbschlagbiegeversuchsunclassified

100 Jahre Kerbschlagbiegeversuch nach Charpy

Blumenauer

2001

Mat.-wiss. u. Werkstofftech.

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Loading rate effects on cleavage fracture of pre-cracked CVN specimens: 3-D studies

Cited by 22 publications

References 23 publications

A Weibull stress model to predict cleavage fracture in plates containing surface cracks

A Weibull stress model to predict cleavage fracture in plates containing surface cracks

Correction of constraint loss in fracture toughness measurement of PCVN specimens based on fracture toughness diagram

100 Jahre Kerbschlagbiegeversuch nach Charpy

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