Results 211 to 220 of about 2,817 (257)

Large strain field near an interface crack tip

International Journal of Fracture, 1995
In this paper the elastostatic field near the tip of an interface crack between two materials is analyzed with the fully nonlinear theory. By dividing the crack tip field into narrowing sectors and an expanding sector, the asymptotic equations for the crack tip field are derived and solved.
Y. C. Gao, Z. F. Shi
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Plastic stress and strain fields at a crack tip

Journal of the Mechanics and Physics of Solids, 1968
Abstract Further details of the stress and strain fields associated with the dominant singularity governing the plastic behaviour at a crack tip are presented for conditions of plane stress and plane strain for cracks in both far tensile and far shear fields. Results are obtained for a power hardening material.
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Discrete averaging effects of a strain gage at a crack tip

Engineering Fracture Mechanics, 1996
The paper attempts to quantify some of the general attributes of the strain averaging process near a crack tip. The discrete averaging effect of a strain gage is considered in the assessment of the errors due to placement of the gage, gage length, gage width and number of filaments. Graphs are presented to show the effects of the aforesaid variables.
N.T. Younis, J. Mize
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Simulations of strain relief at the crack tip in silicon

Journal of Physics: Condensed Matter, 2001
The mechanism of strain relief for a tensile strained diamond-structure silicon-atom system containing an initial cut is considered theoretically. Molecular dynamics and molecular mechanics simulations were employed as simulation methods. Loading under finite-temperature conditions starts cleavage crack initiation.
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Strain distribution around a stress corrosion crack tip

British Corrosion Journal, 1985
AbstractAn assessment has been made of the application of the photogrid method to the study of the strain distribution around a propagating stress corrosion crack in an Al–Zn–Mg alloy immersed in aqueous 3·5% sodium chloride. Under the conditions of the investigation it was possible to evaluate the macrostrains, but the technique will need considerable
P. S. Patel, R. A. Jarman
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Crack Tip Strain Field of Strain-Hardening Materials at Low Temperature

1977
Experimental data on the distribution of strains in the plastic strain zone at the crack tip have been obtained for thin-sheet specimens of aluminum alloy D16T (Aluminum Association grade 2024) at 293 and 77 K. The results have been used to check the possibility of relating the strain field by an equation having the form: $$\varepsilon = A{{\sigma ...
N. V. Novikov, A. L. Maystrenko
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FATIGUE CRACK TIP STRAINS IN 7075‐T6 ALUMINUM ALLOY

Fatigue & Fracture of Engineering Materials & Structures, 1987
Abstract— The plastic enclave surrounding a fatigue crack in a 7075‐T6 aluminum alloy specimen is studied using moiré interferometry. Two distinct plastic zones are identified from inspection of moiré interferometric fringe patterns. The sizes and shapes of the monotonic and the cyclic plastic zones are correlated with previous theoretical and ...
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3D Measurement of the Strain Field Surrounding Crack Tip

2008
Finite elements method is widely used for numerical simulations of solid object behaviour in many applications questioning in some cases the necessity of physical experiments. Available databases of material behaviour are quite sufficient for simulations of linear systems.
Daniel Vavrik, Jan Bryscejn, Jan Jakubek, Jaroslav Valach   +3 more
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Finite Strain Crack Tip Fields in Soft Incompressible Elastic Solids

Langmuir, 2008
A finite element model (FEM) is used to study the behavior of the large deformation field near the tip of a crack in a soft incompressible plane stress fracture specimen loaded in mode I. Results are obtained for the case of a neo-Hookean solid (ideal rubber) and a hyperelastic solid with exponentially hardening behavior. In contrast to the predictions
Venkat R, Krishnan, Chung Yuen, Hui, Rong, Long   +2 more
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Strain contrast at crack tips for in-situ transmission electron microscopy straining experiments

Ultramicroscopy, 1993
Abstract The diffraction contrast from the vicinity of crack tips under load is analyzed. Two distinct types of contrast are identified. One is due to elastic changes in thickness of the foil and the other to stress-induced lattice rotations about the crack tip.
Marc De Graef, David R. Clarke
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