Prediction of crack resistance for heat-resistant steels taking into account the specimen size effect. Communication 1. Results of experimental investigations

1997 ◽  
Vol 29 (1) ◽  
pp. 1-15 ◽  
Author(s):  
V. T. Troshchenko ◽  
V. V. Pokrovskii ◽  
V. G. Kaplunenko
Keyword(s):  
Size Effect ◽  
Crack Resistance ◽  
Specimen Size ◽  
Experimental Investigations ◽  
Heat Resistant ◽  
Heat Resistant Steels

Influence of specimen dimensions on the characteristics of cyclic crack resistance of heat-resistant steels. Report I

1986 ◽  
Vol 18 (4) ◽  
pp. 419-425 ◽  
Author(s):  
V. T. Troshchenko ◽  
V. V. Pokrovskii ◽  
V. G. Kaplunenko
Keyword(s):  
Crack Resistance ◽  
Cyclic Crack Resistance ◽  
Heat Resistant ◽  
Heat Resistant Steels

Crack Resistance Curve Measurement With Miniaturized CT Specimen

2018 ◽  
Author(s):  
Rachid Chaouadi ◽  
Marlies Lambrecht ◽  
Robert Gérard
Keyword(s):  
Size Effect ◽  
Crack Resistance ◽  
Stable Crack Growth ◽  
Compact Tension ◽  
Specimen Size ◽  
Specimen Thickness ◽  
Resistance Curve ◽  
Size Correction ◽  
Reactor Pressure

The use of miniature compact tension (mini-CT) specimens for fracture mechanics was experimentally demonstrated to allow the characterization of ferritic steels in the transition regime. In particular, the master curve transition temperature T0 can confidently be determined according to the ASTM E1921 standard using mini-CT specimens. This means that specimen size effect is well taken into account if loss of constraint is limited by restricting the test temperature range to remain below the allowed maximum loading level. In the upper shelf ductile regime, where stable crack growth occurs, a number of challenges should be overcome to use such a geometry to derive the crack resistance curve, or JR-curve, transferrable to a structure. Indeed, despite a large scatter, the experimental data on several materials suggest a size effect that underestimates the crack resistance when reducing specimen size. The crack resistance behavior of several reactor pressure vessel materials was investigated with square-sized ligament compact tension specimens of various size ranging from 1 inch-thickness (B = 25 mm) to the smallest thickness (B = 4.2 mm) of the mini-CT. The main objective of this paper is to estimate the crack resistance behavior of RPV steels that would be obtained with a standard 1T-CT specimen by using mini-CT with the appropriate specimen size correction. After a series of scaling attempts that were not successful, based on a simple dimensional analysis, a simple analytical formulation based on specimen thickness and ligament is suggested to account for specimen size effect for the CT geometry. Reasonable agreement could generally be found on a number of RPV materials between crack resistance measured with mini-CT and standard 1T-CT specimens.

Influence of temperature and loading cycle asymmetry on the crack resistance characteristics of heat-resistant steels

1983 ◽  
Vol 15 (8) ◽  
pp. 1035-1046
Author(s):  
V. T. Troshchenko ◽  
V. V. Pokrovskii ◽  
P. V. Yasnii ◽  
Yu. S. Skorenko ◽  
M. Klesnil ◽  
...  
Keyword(s):  
Crack Resistance ◽  
Cycle Asymmetry ◽  
Influence Of Temperature ◽  
Loading Cycle ◽  
Heat Resistant ◽  
Heat Resistant Steels

Effect of test temperature on the crack resistance of structural heat-resistant steels

1986 ◽  
Vol 22 (1) ◽  
pp. 96-103
Author(s):  
V. T. Troshchenko ◽  
P. V. Yasnii ◽  
V. V. Pokrovskii
Keyword(s):  
Crack Resistance ◽  
Test Temperature ◽  
Heat Resistant ◽  
Heat Resistant Steels

Influence of specimen dimensions on the characteristics of cyclic crack resistance of heat resistant steels. Report 2

1986 ◽  
Vol 18 (6) ◽  
pp. 723-728 ◽  
Author(s):  
V. T. Troschenko ◽  
V. V. Pokrovskii ◽  
V. G. Kaplunenko
Keyword(s):  
Crack Resistance ◽  
Cyclic Crack Resistance ◽  
Heat Resistant ◽  
Heat Resistant Steels

scholarly journals Z-phase Formation during Creep and Aging in 9–12% Cr Heat Resistant Steels

2006 ◽  
Vol 46 (5) ◽  
pp. 769-775 ◽  
Author(s):  
Kota Sawada ◽  
Hideaki Kushima ◽  
Kazuhiro Kimura
Keyword(s):  
Phase Formation ◽  
Heat Resistant ◽  
Heat Resistant Steels

scholarly journals Experimental data on strength properties of mussel shell concretes and specimen size effect

Data in Brief ◽  
2021 ◽  
Vol 35 ◽  
pp. 106954
Author(s):  
Costas A. Anagnostopoulos ◽  
Denis Cabja ◽  
Chrysi A. Papadimitriou
Keyword(s):  
Experimental Data ◽  
Size Effect ◽  
Strength Properties ◽  
Specimen Size ◽  
Mussel Shell

scholarly journals Fracture and Size Effect of PFRC Specimens Simulated by Using a Trilinear Softening Diagram: A Predictive Approach

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3795
Author(s):  
Fernando Suárez ◽  
Jaime C. Gálvez ◽  
Marcos G. Alberti ◽  
Alejandro Enfedaque
Keyword(s):  
Reinforced Concrete ◽  
Size Effect ◽  
A Priori ◽  
Plain Concrete ◽  
Specimen Size ◽  
Bending Test ◽  
Orientation Factor ◽  
Fibre Reinforced Concrete ◽  
Softening Function ◽  
Three Point Bending

The size effect on plain concrete specimens is well known and can be correctly captured when performing numerical simulations by using a well characterised softening function. Nevertheless, in the case of polyolefin-fibre-reinforced concrete (PFRC), this is not directly applicable, since using only diagram cannot capture the material behaviour on elements with different sizes due to dependence of the orientation factor of the fibres with the size of the specimen. In previous works, the use of a trilinear softening diagram proved to be very convenient for reproducing fracture of polyolefin-fibre-reinforced concrete elements, but only if it is previously adapted for each specimen size. In this work, a predictive methodology is used to reproduce fracture of polyolefin-fibre-reinforced concrete specimens of different sizes under three-point bending. Fracture is reproduced by means of a well-known embedded cohesive model, with a trilinear softening function that is defined specifically for each specimen size. The fundamental points of these softening functions are defined a priori by using empirical expressions proposed in past works, based on an extensive experimental background. Therefore, the numerical results are obtained in a predictive manner and then compared with a previous experimental campaign in which PFRC notched specimens of different sizes were tested with a three-point bending test setup, showing that this approach properly captures the size effect, although some values of the fundamental points in the trilinear diagram could be defined more accurately.

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