Results 221 to 230 of about 80,595 (263)
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On the Energy of Dynamic Fractures
International Journal of Nonlinear Sciences and Numerical Simulation, 2012Abstract The validity of the constant propagation fracture energy postulation for dynamic fracture is discussed. As shown from existing direct and indirect experimental results, this assumption may not represent the physical reality. For spontaneous fractures, the fracture energy was shown to increase linearly with the crack length, and ...
Kaiwen Xia +2 more
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2001
With the advent ofscalable parallel computers, atomistic simulations are providing immediate insights into the nature off racture dynamics by allowing us to “see” what is happening on the atomic scale. One ofour most intriguing findings is a dynamic instability ofthe crack tip in rapid brittle fracture which prevents a crack from achieving its ...
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With the advent ofscalable parallel computers, atomistic simulations are providing immediate insights into the nature off racture dynamics by allowing us to “see” what is happening on the atomic scale. One ofour most intriguing findings is a dynamic instability ofthe crack tip in rapid brittle fracture which prevents a crack from achieving its ...
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International Journal of Fracture, 1986
Dynamic fracture toughness versus crack velocity relations of Homalite-100, polycarbonate, hardened 4340 steel and reaction bonded silicon nitride are reviewed and discrepancies with published data and their probable causes are discussed. Data scatter in published data are attributed in part to the observed fluctuations in crack velocities. The results
A. S. Kobayashi +4 more
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Dynamic fracture toughness versus crack velocity relations of Homalite-100, polycarbonate, hardened 4340 steel and reaction bonded silicon nitride are reviewed and discrepancies with published data and their probable causes are discussed. Data scatter in published data are attributed in part to the observed fluctuations in crack velocities. The results
A. S. Kobayashi +4 more
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The atomic dynamics of fracture
Journal of the Mechanics and Physics of Solids, 2001Using the computational molecular dynamics, the author performs an atomistic simulation of crack tip formation and deformation, unattainable by experimental measurement or unpredictable by continuum elasticity theory. The number of atoms may reach \(10^9\).
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Microstatistical Fracture Mechanics in Dynamic Fracture
1990This section discusses attempts to construct a microstatistical fracture mechanics; that is, a methodology that relates the kinetics of material failure on the microstructural level to continuum mechanics. The approach is to introduce microstructural descriptions of damage into the continuum constitutive relations as internal state variables.
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1990
Dynamic (inertia and strain rate) effects influence crack growth processess if the applied loading rate is sufficiently high or if the crack tip moves with a speed that is a significant fraction of the wave velocities. In the paper basic results as well as solutions to boundary value problems incorporating dynamic effects are discussed.
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Dynamic (inertia and strain rate) effects influence crack growth processess if the applied loading rate is sufficiently high or if the crack tip moves with a speed that is a significant fraction of the wave velocities. In the paper basic results as well as solutions to boundary value problems incorporating dynamic effects are discussed.
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Dynamics of Fracture Propagation
1974In discussing the fracture of solids under a single application of the load, generally one may differentiate three types of material response. The first is the so-called crystalline shatter of a defect-free crystal with an ideally uniform geometry and under ideally uniform external loads, or fragmentation of defect-free high strength brittle solids. In
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Experimental Fracture Dynamics
1990This chapter considers the fracture behaviour of propagating and subsequently arresting cracks and of cracks under impact loading. Loading techniques and measuring methodologies for determining the crack arrest toughness KIc and the impact fracture toughness KId are discussed.
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2006
L-Convex Polyominoes: A Survey (G Castiglione & A Restivo) Contextual Array Grammars (R Freund et al.) A Cosmic Muse (T Head) Triangular Pasting System (T Kalyani et al.) Petri Nets, Event Structures and Algebra (K Lodaya) Simple Deformation of 4D Digital Pictures (A Nakamura) On Languages Defined by Numerical Parameters (A Salomaa) Digitalization of ...
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L-Convex Polyominoes: A Survey (G Castiglione & A Restivo) Contextual Array Grammars (R Freund et al.) A Cosmic Muse (T Head) Triangular Pasting System (T Kalyani et al.) Petri Nets, Event Structures and Algebra (K Lodaya) Simple Deformation of 4D Digital Pictures (A Nakamura) On Languages Defined by Numerical Parameters (A Salomaa) Digitalization of ...
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