Crack-branching

Congleton, J.; Fetch, N. J.

doi:10.1080/14786436708222774

Cited by 135 publications

(41 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A number of investigators have used this idea to determine the crack growth speed [see 21,[27][28][29]. Recently, however, these markings have been reinterpreted as a crack front wave that possess soliton-like characteristics [30,31].…”

Section: Measurement Of Crack Position and Speedmentioning

confidence: 99%

“…The quasi-static failure stress has been used, but the actual crack tip stress depends on the crack speed and thus the crack speed might enter into the picture. However, there are many experiments, where the crack speed has been measured; Congleton and Petch [27] Kerkhof [32] measured the crack speed using ultrasonic fractography and showed that "the surface of the crack, after having reached this final velocity, shows a fine roughness in the beginning of this phase with, later, rough hackles and typical branching". In other words, the crack surface roughness continues to evolve even though the crack speed has attained a constant value at the limiting speed implying that the roughness must be correlated to the stress field and not the crack speed.…”

Section: Crack Propagationmentioning

confidence: 99%

See 1 more Smart Citation

Experimental Challenges in the Investigation of Dynamic Fracture of Brittle Materials

Ravi‐Chandar

2001

Physical Aspects of Fracture

View full text Add to dashboard Cite

Section: Measurement Of Crack Position and Speedmentioning

confidence: 99%

Section: Crack Propagationmentioning

confidence: 99%

Experimental Challenges in the Investigation of Dynamic Fracture of Brittle Materials

Ravi‐Chandar

2001

Physical Aspects of Fracture

View full text Add to dashboard Cite

“…Early experimental investigations by researchers such as Schardin [1], Clark and Irwin [2], and Congleton and Petch [3] led to the following observations concerning the phenomenon of crack branching. Firstly, the velocity of the crack tips after bifurcation was very similar to that of the single crack prior to the branching event.…”

Section: Introductionmentioning

confidence: 99%

Dynamic crack bifurcation in PMMA

Murphy

Ali

2006

Engineering Fracture Mechanics

View full text Add to dashboard Cite

Publication informationEngineering Fracture Mechanics, 73 (16): 2569-2587Publisher Elsevier Item record/more information http://hdl.handle.net/10197/4908 Publisher's statementThis is the author's version of a work that was accepted for publication in Engineering Fracture Mechanics. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Engineering Fracture Mechanics (73, 16, (2006) AbstractAn investigation of the branching characteristics of small PMMA single edge notched tensile (SENT) specimens is presented. The influence of notch depth and specimen thickness was examined and it was found that branching only occurred for thicker specimens and very short notch depths. The location at which successful branching occurred was very consistent for a given notch depth. Subsequently, however, a statistical variation of branching patterns was observed. A series of simulations was then performed to provide further insight into these tests and in particular to examine the evolution of the fracture process region ahead of the running crack. A finite volume / cohesive zone formulation was used to model micro-crack nucleation and dynamic interaction in the process zone. The cohesive strength and fracture resistance were estimated from unnotched tensile tests and the application of LEFM to the notch test data. Even though a very simple criterion was used to govern the insertion and subsequent behaviour of the cohesive surfaces in the model, many of the experimental observations were reproduced, including high frequency oscillations in crack velocity, the substantial increase in the fracture surface area due to the formation of subsurface microcracks, and location at which successful branching took place.

show abstract

“…If crack-branching occurs when an 'advance' crack that exists a short distance ahead of the main crack experiences a critical stress, some calculations are possible [7,9]. The average stress on a 2c long 'advance' crack that is a distance r = nc ahead of the running crack tip is :…”

Section: Conditions For Crack-branebingmentioning

confidence: 99%

“…However, some difference of opinion exists as to the role of high crack velocity. Certainly, for fast moving cracks, the redistribution of the stress field ahead of the moving crack tip as calculated by Yoffe [6] is important but the branching event seems stress intensity controlled and the high velocity a necessary but not a sufficient condition for branching [7,8].…”

Section: Introductionmentioning

confidence: 99%

Practical applications of crack-branching measurements

Congleton

Dvorak

1973

Proceedings of an International Conference on Dynamic Crack Propagation

Self Cite

View full text Add to dashboard Cite

Conditions for crack-branching are reviewed and relationships between the stress intensity for crack-branching and fracture toughness derived. For very brittle materials microscopic sub-branching should be observed when the crack tip stress intensity reaches'" 1.4 Klc but in most metals the stress intensity required will be 2.3 KIc or greater. Larger stress intensities are required to promote full bifurcation. Experimental confirmation is presented, and some consideration given to stress-corrosion crack-branching, microstructural factors and crack-branching in bursting tubes.

show abstract

Crack-branching

Cited by 135 publications

References 12 publications

Experimental Challenges in the Investigation of Dynamic Fracture of Brittle Materials

Experimental Challenges in the Investigation of Dynamic Fracture of Brittle Materials

Dynamic crack bifurcation in PMMA

Practical applications of crack-branching measurements

Contact Info

Product

Resources

About