Elastic stress intensity factors evaluated by caustics

1981 ◽  
pp. 189-252 ◽  
Author(s):  
P. S. Theocaris
Keyword(s):  
Stress Intensity ◽  
Stress Intensity Factors ◽  
Elastic Stress ◽  
Intensity Factors

scholarly journals The Application of Fracture Mechanics to the Problem of Crevasse Penetration

1976 ◽  
Vol 17 (76) ◽  
pp. 223-228 ◽  
Author(s):  
R. A. Smith
Keyword(s):  
Stress Intensity Factor ◽  
Stress Intensity ◽  
Fracture Mechanics ◽  
Intensity Factor ◽  
Stress Intensity Factors ◽  
Close Agreement ◽  
Elastic Stress ◽  
Intensity Factors ◽  
Wide Range ◽  
Sharp Crack

AbstractThe elastic stress intensity factor is a parameter used in fracture mechanics to describe stress conditions in the vicinity of the tip of a sharp crack. By superimposing solutions of stress intensity factors for different loading conditions, equations are derived which model crevasses in ice. Solutions are presented for the theoretical depth of isolated crevasses, free from or partially filled with water. Close agreement exists with a previous calculation by Weertman using a different technique. The effect of crevasse spacing is investigated and it is demonstrated that closer spacing always reduces crevasse depth, but over a wide range of spacing the predicted variation in depth is slight.

An Evaluation of Finite Element Methods for the Computation of Elastic Stress Intensity Factors

1973 ◽  
Vol 95 (1) ◽  
pp. 177-185 ◽  
Author(s):  
J. J. Oglesby ◽  
O. Lomacky
Keyword(s):  
Finite Element ◽  
Stress Intensity ◽  
Stress Intensity Factors ◽  
Elastic Stress ◽  
Computational Techniques ◽  
Intensity Factors ◽  
Structural Details ◽  
Direct Stiffness ◽  
Complex Structural ◽  
Numerical Approaches

Since theoretical solutions for stress intensity factors are limited to very simple configurations, numerical approaches must be utilized. However such approximate procedures must first be verified on many simple configurations before they can be applied with confidence to complex structural details. This paper discusses the merits of several computational techniques based on the utilization of finite element direct stiffness method of analysis. Examples of the application of such methods to several simple axisymmetric and two-dimensional plane strain problems are presented.

Crack growth pattern prediction in a thin walled cylinder based on closed form thermo-elastic stress intensity factors

2017 ◽  
Vol 31 (4) ◽  
pp. 1603-1610 ◽  
Author(s):  
Mohammad Abbaspour Niasani ◽  
Rahmatollah Ghajar ◽  
Hamed Saeidi Googarchin ◽  
Seyed Mohammad Hossein Sharifi
Keyword(s):  
Stress Intensity ◽  
Closed Form ◽  
Crack Growth ◽  
Stress Intensity Factors ◽  
Growth Pattern ◽  
Elastic Stress ◽  
Intensity Factors ◽  
Thin Walled ◽  
Walled Cylinder ◽  
Pattern Prediction

FINITE ELEMENT ANALYSIS OF A SEMI-ELLIPTICAL EXTERNAL CRACK IN A BURIED PIPE

2009 ◽  
Vol 33 (3) ◽  
pp. 399-409 ◽  
Author(s):  
Hadi Khoramishad ◽  
Majid Reza Ayatollahi
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Intensity ◽  
Stress Intensity Factors ◽  
Elastic Stress ◽  
Intensity Factors ◽  
Buried Pipe ◽  
Element Analysis ◽  
Circumferential Crack ◽  
Crack Position

In this research, a buried pipe containing an external semi-elliptical crack has been modeled and investigated using finite element analysis. The interaction between the soil and pipe has been considered according to the Burns and Richard model. A few major parameters, namely, the soil height over pipe, the geometries of pipe and crack and the circumferential position of crack on pipe have been changed and their effects on elastic stress intensity factors have been studied at different positions along the crack front. The results showed that the crack experienced mixed mode loading condition and the circumferential crack position on pipe had a significant influence on the stress intensity factors.

scholarly journals The Application of Fracture Mechanics to the Problem of Crevasse Penetration

1976 ◽  
Vol 17 (76) ◽  
pp. 223-228 ◽  
Author(s):  
R. A. Smith
Keyword(s):  
Stress Intensity Factor ◽  
Stress Intensity ◽  
Fracture Mechanics ◽  
Intensity Factor ◽  
Stress Intensity Factors ◽  
Close Agreement ◽  
Elastic Stress ◽  
Intensity Factors ◽  
Wide Range ◽  
Sharp Crack

Abstract The elastic stress intensity factor is a parameter used in fracture mechanics to describe stress conditions in the vicinity of the tip of a sharp crack. By superimposing solutions of stress intensity factors for different loading conditions, equations are derived which model crevasses in ice. Solutions are presented for the theoretical depth of isolated crevasses, free from or partially filled with water. Close agreement exists with a previous calculation by Weertman using a different technique. The effect of crevasse spacing is investigated and it is demonstrated that closer spacing always reduces crevasse depth, but over a wide range of spacing the predicted variation in depth is slight.

A Simple Representation of the J-Integral and Some Estimates of Elastic Stress Intensity Factors

1993 ◽  
Vol 60 (1) ◽  
pp. 29-32 ◽  
Author(s):  
V. A. Lubarda
Keyword(s):  
Stress Intensity ◽  
Boundary Value Problems ◽  
Stress Intensity Factors ◽  
Elastic Stress ◽  
Boundary Value ◽  
Crack Tip ◽  
J Integral ◽  
Intensity Factors ◽  
Simple Representation ◽  
Edge Cracks

Precise estimates of the elastic stress intensity factors for the Griffith and edge cracks are made by using one convenient representation of the J-integral and asymptotic crack-tip fields, without recourse to the solutions of corresponding boundary value problems.

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