Results 211 to 220 of about 100,119 (262)

Cracks screened by plastic zones

Materials Science and Engineering, 1986
Abstract If dislocations are distributed in a plastic zone around a crack, the strength of the square root singularity of the stresses around the tip is changed, and the stress intensity factors are modified. Since the change in the stress intensity vector must be a linear function of the dislocation density, it is possible to define universal weight
H.O.K. Kirchner, G. Michot
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A plasticity analysis of anchorage zones

Magazine of Concrete Research, 1994
This Paper is the second of three on the behaviour of anchorage zones for prestressed concrete. Details are presented of a plasticity approach to the ultimate strength analysis of concrete prisms strip-loaded through rigid steel plates. Such a loading arrangement is assumed to represent adequately the transfer of force from tendon to concrete at the ...
T. J. Ibell, C. J. Burgoyne
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Investigation of distribution of plastic zone in the process of plastic penetration

Journal of Materials Processing Technology, 2007
Abstract This paper established a three-dimensional finite element model of plastic penetration according to the definition of ring rolling, based on ABAQUS finite element (FE) software package. Method of rigid-plastic dynamic explicit FE is used during the processes of ring rolling FE simulations with different reductions.
D.S. Qian, L. Hua, Z.J. Zuo
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Plastic zone characterization by recrystallization

Journal of Materials Science Letters, 1987
Description des essais de calibrage qui determinent la correlation entre la grosseur des grains recristallises et la deformation. Ceci necessite l'analyse de la distribution de deformation dans les zones de plasticite a l'extremite de ...
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Structural and functional plasticity of the cytoplasmic active zone

Current Opinion in Neurobiology, 2011
The presynaptic active zone (AZ) membrane is the site where vesicle fusion mediates information transfer between connected neurons. Reaching into the cytoplasm, an electron-dense cytomatrix (CAZ) is found to decorate the AZ membranes. CAZ architectures are meant not only to regulate the synaptic vesicle exocycle/endocycle, but also to structurally ...
Stephan J, Sigrist, Dietmar, Schmitz
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The Active Zone T-Bar—A Plasticity Module?

Journal of Neurogenetics, 2010
The synaptic active zone, the site where Ca(2+)-triggered fusion of synaptic vesicles takes place, is commonly associated with protein-rich, electron-dense cytomatrices. The molecular composition and functional role of active zones, especially in the context of vesicular exo- and endocytosis, are under intense investigation. Per se, Drosophila synapses,
Carolin, Wichmann, Stephan J, Sigrist
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Molecular organization and plasticity of the cytomatrix at the active zone

Current Opinion in Neurobiology, 2012
Regulated neurotransmitter release from presynaptic boutons is crucial for the functioning of chemical synapses, what in turn governs the functional performance of the nervous system. Release occurs at the active zone (AZ), a specialized region of the presynaptic plasma membrane that is defined by a unique and complex meshwork of proteins--the ...
Eckart D, Gundelfinger, Anna, Fejtova
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Plastic Limit Analysis Using the Simplified Theory of Plastic Zones

Journal of Pressure Vessel Technology, 2021
Abstract The simplified theory of plastic zones (STPZ) was mainly developed to determine strain ranges and accumulated strains in the state of shakedown at cyclic loading between prescribed levels of loading. Kinematic hardening is an indispensable feature of the STPZ. The plastic limit load, however, is defined for monotonic loading and
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Plastic Hinge and Plastic Zone Seismic Analysis of Frames

2015
The most common approach to perform seismic design of structures is the traditional one based on a linear elastic analysis assumption. On the other hand, nonlinear analysis methods due to their higher complexity and computational cost are mainly applied as a verification tool for the assessment of existing structures.
Vissarion Papadopoulos, Michalis Fragiadakis   +1 more
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Estimating plastic zone sizes

International Journal of Fracture, 1974
Dans la mesure ou le modele de Dugdale est un modele approximatif pour l'analyse pseudo elastoplastique, l'auteur propose une methode simple pour estimer les dimensions de la zone plastique se trouvant en avant de l'extremite d'une fissure. Da das Dugdale Modell ein annaherndes Modell for pseudo elastisch plastische Analyse ist, kann man das folgende ...
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