Results 161 to 170 of about 49,682 (217)

A novel crack growth equation based on crack tip opening displacement variation

57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2016
The crack tip opening displacement (CTOD) plays an important role in fatigue damage evaluation. An analytical approximation is employed in this paper to calculate the CTOD variation, which is inspired from the scanning electron microscopy (SEM) experiment.
Shan Jiang, Wei Zhang, Zili Wang
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Determining Fatigue Crack Opening Loads from Near-Crack-Tip Displacement Measurements

1999
The aim of this research was to develop a near-crack-tip measurement method that quantifies crack closure levels in the near-threshold fatigue crack growth regime—a regime where crack closure is not well characterized by remote compliance methods. Further understanding of crack closure mechanics was gained by performing novel crack growth experiments ...
WT Riddell, RS Piascik, MA Sutton, W Zhao, SR McNeill, JD Helm   +5 more
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Crack-tip blunting and crack-opening displacement under large-scale yielding

Metal Science, 1976
AbstractThe recrystallization method, a newly developed technique for measuring plastic strain, makes it possible to observe directly the intense strain region near the crack tip. The shape of this zone and the plastic strain distribution obtained by this method are similar to the theoretical findings of Rice and Johnson.
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Measurement of Crack Tip Opening Displacement of Paper

Journal of Packaging Science & Technology, Japan, 2000
Crack opening displacement (COD) on double edge notched (DEN), single edge notched (SEN) and center notched (SCN) specimens with various crack length was quantitatively analyzed by using video-microscopy for a machine-grazed paper. A linear relationship appears between COD and the distance from the crack tip throughout the testing period for all ...
Takagi, Kazuyoshi, Tanaka, Atsushi, Yamauchi, Tatsuo   +2 more
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Crack tip opening and advance displacements of blunted cracks under plane stress

Journal of Materials Science, 1991
The phenomenon of ductile blunting under plane stress conditions in cracked polycarbonate plates was studied. Because this phenomenon is intimately connected with the amount of crack opening displacement (CTOD) and its analogous phenomenon of crack tip advance displacement (CTAD), a study was undertaken of the mechanism of the development of blunting ...
P. S. Theocaris, V. Kytopoulos
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Relation Between J-Integral and Crack Tip Opening Displacement

1981
This paper describes the analysis by the finite element method, which shows the correlation between the J-integral (J) and crack tip opening displacement (CTOD). The result is that the non-dimensional J-integral ~ non-dimensional CTOD relation seems to be expressed by a single curve for various metals.
T. Miyoshi, M. Shiratori
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Crack tip opening displacement in relatively high toughness materials

Engineering Fracture Mechanics, 1991
Abstract A theoretical model of crack tip opening displacement is presented which is based on a concept of rigid body rotation near the crack tip. The proposed relation is used to obtain the crack tip opening displacement in three point bend specimens of low strength high toughness materials.
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Prediction of crack tip opening displacement of fibre composites

Engineering Fracture Mechanics, 1992
Abstract The fracture behaviour of single edge notched unidirectional glass fibre reinforced epoxy resin composites under tensile loading was investigated. Load-elongation curves were obtained for crack length varying from 4, 6, 8, 10 and 12mm and different fibre volume fractions of 0.48, 0.502 and 0.525.
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Comparison of methods for crack tip opening displacement toughness determination

Journal of Materials Science, 1991
The crack tip opening displacement (CTOD) initiation toughness has been obtained by different methods in Cr and Cr-Mo steels at 30, 200 and 400 ‡C. The crack tip stretching and grain deformation has been investigated by scanning electron microscope and optical microscopic studies and by microhardness measurements.
R. K. Pandey, A. N. Kumar, P. Sundaram
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Determination of Crack-Tip Opening Displacement in T-Type Wedge Opening Loaded Specimen

Experimental Mechanics, 2019
The protective layer at the crack tip of an alloy component can be damaged, and the resistance to crack propagation can be reduced by the combined effects of stress and a corrosive environment. Therefore, the measurement of crack-tip opening displacement (CTOD) can be applied to characterize the crack propagation rate (da/dt) during stress corrosion ...
W. Sochu, N. Noraphaiphipaksa, A. Manonukul, C. Kanchanomai   +3 more
openaire   +1 more source