Stability analysis of systems with delay-dependant coefficients: A two-parameter approach

Treatment of stress multiaxiality in fatigue assessment is practically important in many components subjected to cyclic loading during their operation. Based on the results of fatigue tests on hollow and solid bar specimens of SUS316NG and SGV410 under various combinations of axial and torsional stresses, accuracy of fatigue life prediction based on the conventional parameters as well as a two parameter approach newly proposed here was studied. The conventional parameters tended to provide conservative prediction of the failure life for shear-dominated cases especially for SUS316NG while the new approach was able to give more realistic prediction of failure lives.

Download Full-text

Grain Growth during Annealing: Experiments and Modelling

Materials Science Forum ◽

10.4028/www.scientific.net/msf.715-716.611 ◽

2012 ◽

Vol 715-716 ◽

pp. 611-616 ◽

Cited By ~ 1

Author(s):

M. Candic ◽

Bao Hui Tian ◽

Christof Sommitsch

Keyword(s):

Grain Growth ◽

Second Phase ◽

Excellent Correlation ◽

Grain Sizes ◽

Second Phase Particles ◽

Different Temperatures ◽

Grain Growth Kinetics ◽

Parameter Approach ◽

Annealing Experiments ◽

Two Parameter

In the present work, for the description of grain coarsening, a probabilistic and a deterministic 2D cellular automaton simulation setup were developed. The results of the simulation have been validated by solution annealing experiments of austenitic stainless steel 304L (Fe-18Cr-8Ni) at different temperatures and times. Both cellular automata models show an excellent correlation between the experimental determined data and grain growth kinetics based upon considerations of temperature and second phase particles. Additionally, a two parameter approach of the probabilistic model was implemented, resulting in determining the grain sizes limiting normal and abnormal grains and accurate description of grain growth.

Download Full-text

Two-parameter approach to elastic-plastic fracture and failure assessment diagram. (Application to carbon steel for piping).

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A ◽

10.1299/kikaia.53.2363 ◽

1987 ◽

Vol 53 (496) ◽

pp. 2363-2369 ◽

Cited By ~ 4

Author(s):

Hideo KOBAYASHI ◽

Haruo NAKAMURA ◽

Kohmei KASHIWAGI

Keyword(s):

Carbon Steel ◽

Elastic Plastic ◽

Failure Assessment Diagram ◽

Failure Assessment ◽

Parameter Approach ◽

Two Parameter

Download Full-text

The Two-Parameter Approach for Fracture Mechanics: Some Industrial Applications

Fracture at all Scales - Lecture Notes in Mechanical Engineering ◽

10.1007/978-3-319-32634-4_6 ◽

2016 ◽

pp. 105-134 ◽

Cited By ~ 5

Author(s):

M. Hadj Meliani ◽

O. Bouledroua ◽

M. Ould-M’beirick ◽

K. El-miloudi ◽

Dj. Neggaz ◽

...

Keyword(s):

Fracture Mechanics ◽

Industrial Applications ◽

Parameter Approach ◽

Two Parameter

Download Full-text

T-stress estimation by the two-parameter approach for a specimen with a V-shaped notch

Journal of Applied Mechanics and Technical Physics ◽

10.1134/s0021894417030208 ◽

2017 ◽

Vol 58 (3) ◽

pp. 546-555 ◽

Cited By ~ 3

Author(s):

O. Bouledroua ◽

A. Elazzizi ◽

M. Hadj Meliani ◽

G. Pluvinage ◽

Y. G. Matvienko

Keyword(s):

T Stress ◽

Stress Estimation ◽

Parameter Approach ◽

Two Parameter

Download Full-text

Constraint of Semi-Elliptical Surface Cracks in T and L-Joints

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.326-328.939 ◽

2006 ◽

Vol 326-328 ◽

pp. 939-944

Author(s):

Hyung Yil Lee ◽

Yun Jae Kim

Keyword(s):

Finite Element ◽

Structural Characteristics ◽

Pressure Vessels ◽

Surface Cracks ◽

Spring Model ◽

Constraint Effect ◽

T Stress ◽

Line Spring Model ◽

Parameter Approach ◽

Two Parameter

Critical defects in pressure vessels and pipes are generally found in the form of a semielliptical surface crack, and the analysis of which is consequently an important issue in engineering fracture mechanics. Furthermore, in addition to the traditional single parameter K or J-integral, the second parameter like T-stress should be measured to quantify the constraint effect. In this work, the validity of the line-spring model is investigated by comparing line-spring J-T solutions to the reference 3D finite element J-T solutions. A full 3D-mesh generating program for semi-elliptical surface cracks is employed to provide such reference 3D solutions. Then some structural characteristics of the surface-cracked T and L-joints are studied by mixed mode line-spring finite element. Negative T-stresses observed in T and L-joints indicate the necessity of J-T two parameter approach for analyses of surface-cracked T and L-joints.

Download Full-text