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Keywords
(8)
Critical Value
Fracture Toughness
Grain Size
Nitrogen
Stress Distribution
Tensile Properties
Yield Stress
Mild Steel
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Relationship between critical tensile stress and fracture toughness in mild steel
Relationship between critical tensile stress and fracture toughness in mild steel,10.1016/00225096(73)900082,Journal of The Mechanics and Physics of
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Relationship between critical tensile stress and fracture toughness in mild steel
(
Citations: 175
)
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R. O. Ritchie
,
J. F. Knott
,
J. R. Rice
SUMMARY AN ANALYSIS is presented which relates the
critical value
of tensile stress (a,) for unstable cleavage fracture to the
fracture toughness
(K,,) for a highnitrogen
mild steel
under plane strain conditions. The correlation is based on (i) the model for cleavage cracking developed by E. Smith and (ii) accurate plastic*lastic solutions for the stress distributions ahead of a sharp crack derived by J. R. Rice and coworkers. Unstable fracture is found to be consistent with the attainment of a stress intensification close to the tip such that the maximum principal stress a,, exceeds a, over a characteristic distance, determined as twice the grain size. The model is seen to predict the experimentally determined variation of K,, with temperature over the range 150 to 75°C from a knowledge of the
yield stress
and hardening properties. It is further shown that the onset of fibrous fracture ahead of the tip can be deduced from the position of the maximum achievable stress intensiiication. The relationship between the model for fracture ahead of a sharp crack, and that ahead of a rounded notch, is discussed in detail.
Journal:
Journal of The Mechanics and Physics of Solids  J MECH PHYS SOLIDS
, vol. 21, no. 6, pp. 395410, 1973
DOI:
10.1016/00225096(73)900082
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Citation Context
(54)
...The main ones are the Chell model [2], which involves the use of the Jintegral and takes into account the cracktip plastic strains upon WPS, and the RKR model [
3
], whereby the fracture is related to the normal stresses reaching a critical value c at some characteristic distance r c ahead of the crack tip...
P. V. Yasnii
,
et al.
Fem prediction of the influence of warm prestressing on fracture tough...
...Ritchie–Knott–Rice model (RKR model) [
12
] was used as a fracture criterion in numerical modeling of failure upon WPS...
V. V. Pokrovskii
,
et al.
A calculationexperimental study of cracktip opening displacement and...
...where JC is the real fracture toughness for structural element characterized by geometrical constraint defined by Qstress (which value usually is smaller then zero), JIC is the fracture toughness for plane strain condition for Q=0 and c is the critical stress according to the RitchieKnottRice hypothesis [
11
]...
Marcin Graba
.
Catalogue of the J  Q trajectories for CC(T) and SEN(T) specimens in ...
...Another nonlocal approach to the brittle fracture criteria is based on the assumption that crack propagation occurs when the normal strain (McClintock 1968), or the circumferential stress (
Ritchie et al. 1973
)a t some critical distance from the crack tip, reaches a critical value...
Mykhaylo P. Savruk
,
et al.
Twodimensional fracture mechanics problems for solids with sharp and ...
...Brittle fracture in components containing a sharp crack has been well studied in the literature by various authors (see for example Palaniswamy and Knauss [1], Ritchie et al. [
2
])...
...The first is the critical distance which has been used in the past for sharp cracks [
2
] and the second one is determined based on the theory of critical distances (TCD) [13–18]...
...In this paper, two different values are considered for rc. The first value is the critical distance suggested in the past for sharp cracks as follows [
2
,9,15]...
M. R. Ayatollahi
,
et al.
Brittle fracture in roundedtip Vshaped notches
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Citations
(175)
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Qing Yang
,
Miyoko Tanaka
,
Shuhua Liang
,
Kazuki Ogino
,
Takahito Yasuda
,
Hirokazu Tatsuoka
Journal:
Physics Procedia
, vol. 11, pp. 114117, 2011
The Development of using the digital projection method to measure the contact angle of ball screw
ChunJen Chen
,
Wenyuh Jywe
,
YuChun Liu
,
HsinHong Jwo
Journal:
Physics Procedia
, vol. 19, pp. 3642, 2011
Fem prediction of the influence of warm prestressing on fracture toughness of heatresistant steel
P. V. Yasnii
,
Yu. I. Pyndus
,
V. B. Glad’o
,
I. B. Okipnyi
,
I. V. Shul’gan
Journal:
Strength of Materials  STRENGTH MATERENGL TR
, vol. 43, no. 2, pp. 113121, 2011
A calculationexperimental study of cracktip opening displacement and residual stresses upon warm prestressing
V. V. Pokrovskii
,
V. G. Sidyachenko
,
V. N. Ezhov
Journal:
Strength of Materials  STRENGTH MATERENGL TR
, vol. 43, no. 1, pp. 5665, 2011
Catalogue of the J  Q trajectories for CC(T) and SEN(T) specimens in tension
Marcin Graba
Published in 2011.