scholarly journals A three-dimensional numerical study of mode I crack tip fields in pressure sensitive plastic solids

2007 ◽  
Vol 44 (6) ◽  
pp. 1863-1879 ◽  
Author(s):  
H.Y. Subramanya ◽  
S. Viswanath ◽  
R. Narasimhan
Keyword(s):  
Numerical Study ◽  
Three Dimensional ◽  
Crack Tip ◽  
Mode I ◽  
Mode I Crack ◽  
Crack Tip Fields ◽  
Pressure Sensitive

Surface effects on mode-I crack tip fields: A numerical study

2010 ◽  
Vol 77 (7) ◽  
pp. 1048-1057 ◽  
Author(s):  
X.L. Fu ◽  
G.F. Wang ◽  
X.Q. Feng
Keyword(s):  
Numerical Study ◽  
Crack Tip ◽  
Surface Effects ◽  
Mode I ◽  
Mode I Crack ◽  
Crack Tip Fields

Mode I crack tip fields in amorphous materials with application to metallic glasses

2007 ◽  
Vol 55 (19) ◽  
pp. 6541-6552 ◽  
Author(s):  
Parag Tandaiya ◽  
R. Narasimhan ◽  
U. Ramamurty
Keyword(s):  
Metallic Glasses ◽  
Amorphous Materials ◽  
Crack Tip ◽  
Mode I ◽  
Mode I Crack ◽  
Crack Tip Fields

On the Extent of Dominance of Asymptotic Elastodynamic Crack-Tip Fields: Part I—An Experimental Study Using Bifocal Caustics

1991 ◽  
Vol 58 (1) ◽  
pp. 87-94 ◽  
Author(s):  
Sridhar Krishnaswamy ◽  
Ares J. Rosakis
Keyword(s):  
High Speed ◽  
Dynamic Stress ◽  
Dynamic Stress Intensity Factor ◽  
Three Dimensional ◽  
Crack Tip ◽  
Mode I ◽  
Transient Effects ◽  
Crack Tip Fields ◽  
Optical Configuration ◽  
Point Bend

The question of the domain of dominance of mode I asymptotic elastodynamic crack-tip fields is investigated experimentally for the cases of dynamically loaded stationary cracks as well as dynamically propagating cracks. The experiments reported are on three-point bend specimens loaded dynamically using a drop-weight tower. An optical configuration leading to a bifocal high-speed camera is proposed. This is used in conjunction with the method of caustics to obtain apparent dynamic stress intensity factor measurements simultaneously from two different regions around the crack tip. The results of this study indicate that three-dimensional and transient effects necessarily have to be taken into account in the interpretation of dynamic fracture experiments.

Fracture Mechanics of Thin Plates and Shells Under Combined Membrane, Bending, and Twisting Loads

2005 ◽  
Vol 58 (1) ◽  
pp. 37-48 ◽  
Author(s):  
Alan T. Zehnder ◽  
Mark J. Viz
Keyword(s):  
Fracture Mechanics ◽  
Plate Theory ◽  
Experimental Studies ◽  
Three Dimensional ◽  
Crack Tip ◽  
Thin Plates ◽  
Element Analysis ◽  
Crack Tip Fields ◽  
Plates And Shells ◽  
Membrane Bending

The fracture mechanics of plates and shells under membrane, bending, twisting, and shearing loads are reviewed, starting with the crack tip fields for plane stress, Kirchhoff, and Reissner theories. The energy release rate for each of these theories is calculated and is used to determine the relation between the Kirchhoff and Reissner theories for thin plates. For thicker plates, this relationship is explored using three-dimensional finite element analysis. The validity of the application of two-dimensional (plate theory) solutions to actual three-dimensional objects is analyzed and discussed. Crack tip fields in plates undergoing large deflection are analyzed using von Ka´rma´n theory. Solutions for cracked shells are discussed as well. A number of computational methods for determining stress intensity factors in plates and shells are discussed. Applications of these computational approaches to aircraft structures are examined. The relatively few experimental studies of fracture in plates under bending and twisting loads are also reviewed. There are 101 references cited in this article.

The dislocation-free zone at a mode I crack tip

1995 ◽  
Vol 50 (2) ◽  
pp. 165-173 ◽  
Author(s):  
Jianqiao Chen ◽  
Shigeo Takezono
Keyword(s):  
Crack Tip ◽  
Mode I ◽  
Mode I Crack ◽  
Free Zone
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