Results 261 to 270 of about 68,107 (316)

Instability in the propagation of fast cracks

Physical Review B, 1992
We report on experimental investigations of the propagation of cracks in the brittle plastic polymethyl methacrylate (PMMA). Velocity measurements with resolution an order of magnitude better than previous experiments reveal the existence of a critical velocity (330\ifmmode\pm\else\textpm\fi{}30 m/s) at which the velocity of the crack tip begins to ...
, Fineberg, , Gross, , Marder, , Swinney
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Models of crack propagation

Physical Review A, 1992
Three simple models of steady-state crack propagation are examined in a search for clues about the nature of dynamic velocity-selection mechanisms in these systems. The first is a one-dimensional model with stick-slip friction which includes, as a special case, a model of an earthquake fault.
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Dynamic stability of a propagating crack

Journal of the Mechanics and Physics of Solids, 2002
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Obrezanova, O., Movchan, A. B., Willis, J. R.   +2 more
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The Propagation of Fatigue Cracks

Journal of Applied Mechanics, 1956
Abstract A theory of the rate of growth of fatigue cracks is extended to the case of large stresses. Recent measurements of McClintock and Ryan are discussed.
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AUTOMATIC CRACK PROPAGATION TRACKING

Computers & Structures, 1985
A finite element based approach to fully automatic crack propagation tracking is presented. The procedure presented combines fully automatic mesh generation with linear fracture mechanics techniques in a geometrically based finite element code capable of automatically tracking cracks in two-dimensional domains.
Mark S. Shephard, Nabil A.B. Yehia, Gary S. Burd, Theodore J. Weidner   +3 more
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Fatigue crack propagation. Report 2. A crack propagation model

Strength of Materials, 1988
1. A model of fatigue crack propagation was proposed; the model is based on determining the specific energy of inelastic strain cumulated at the distance X* from the crack tip, with an allowance made for the energy irreversibly scattered within the scope of the zone of damageRm (Rm≥X*). 2.
V. T. Troshchenko, P. V. Yasnii, V. V. Pokrovskii   +2 more
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Fatigue Crack Propagation of Short Cracks

Journal of Engineering Materials and Technology, 1979
Previous studies have shown that both threshold stress intensity factors and fatigue crack growth rates are dependent on crack size. The average growth rates for very short cracks considerably exceed those given by conventional stress intensity-crack growth laws fitted to long crack data.
M. H. El Haddad, K. N. Smith, T. H. Topper   +2 more
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Crack Propagation in Finite Elastodynamics

Mathematics and Mechanics of Solids, 2005
Within the framework of finite elastodynamics, a crack propagation analysis, for sheets of compressible hyperelastic material, is formulated. By exploiting a dynamic generalization of the Stephenson's result, general far-field loading conditions are considered.
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Dynamic instability in crack propagation

Physical Review E, 1994
A linear stability analysis of the steady state solutions to a model for propagating cracks implies dynamic instability beyond a critical crack speed, oscillatory behavior of the crack tip velocity, and the emergence of spatial structure. The results are in qualitative agreement with experiment.
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Crack propagation at supersonic velocities, I

International Journal of Fracture Mechanics, 1969
A theoretical model for laser-induced supersonic cracks in crystals with weak cleavage planes is developed. The crack is pictured as being driven by a laser-induced expanding plasma. The theory predicts the crack length-time history to be expected for a given energy-time input curve. The conditions for laser-induced supersonic crack production are seen
D. A. Shockey, S. Winkler, D. R. Curran
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