WorldCat Identities

Orowan, E. (Egon) 1902-1989

Overview
Works: 38 works in 75 publications in 2 languages and 680 library holdings
Roles: Translator, Author, Honoree, Creator, Other
Publication Timeline
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Most widely held works about E Orowan
 
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Most widely held works by E Orowan
Physics of strength and plasticity by Ali S Argon( Book )

5 editions published between 1969 and 2003 in English and held by 334 WorldCat member libraries worldwide

Plasticity of crystals : with special reference to metals by Erich Schmid( Book )

1 edition published in 1968 in English and held by 193 WorldCat member libraries worldwide

Mechanical problems of geology by E Orowan( )

2 editions published in 1958 in English and held by 17 WorldCat member libraries worldwide

Die Zugfestigkeit von Glimmer und das Problem der technischen Festigkeit by E Orowan( Book )

6 editions published between 1932 and 1933 in German and held by 16 WorldCat member libraries worldwide

Seismic damping and creep in the mantle by E Orowan( Book )

2 editions published in 1966 in English and held by 5 WorldCat member libraries worldwide

A unified theory of viscosity and viscoelasticity of the molecular-rearrangement type is given in which the two phenomena appear as special cases. The Becker theorem is reviewed; with the Becker distribution of relaxances, the distribution function of activation energies is a constant, viscoelastic creep is logarithmic and the specific damping 1/Q is frequency insensitive in wide ranges of time and frequency. The vibrating-string theories of dislocation damping in general are not feasible because the mean thermal kinetic energy of the basic mode is smaller by order of magnitude than the Peierls-Nabarro dissipation already for amplitudes equal to the Burgers vector for most materials. Low-amplitude damping is treated as a consequence of the perturbation of the activation energies of thermally activated jumps of dislocation segments by the applied stress; since the distribution function of the activation energies is probably close to the Becker distribution, the resulting damping is insensitive to frequency and amplitude and increases steeply with the temperature. The Amontons law of solid friction breaks down at very small amplitudes of displacement, such as those between the walls of small cracks in rocks. The simplest generalization of the Amontons law to include small amplitudes leads to an amplitude- and frequency-independent damping
Dilatancy and the seismic focal mechanism by E Orowan( Book )

2 editions published in 1966 in English and held by 5 WorldCat member libraries worldwide

In a recent paper (Reviews of Geophysics 3:1965) F.C. Frank suggested that the seismic focal stress drop might be the consequence of a mechanical instability of deformation due to dilatancy of the crust and matle. A more complete calculation shows that the instability attributed to dilatancy is a familiar general property of compacted granular masses independent of dilatancy. The rapid propagation of the seismic fault attributed to shear melting by elastic energy release would depend on the assumed absence of friction between the walls of an initial Griffith crack. Since the length of the thin Griffith crack was estimated at 5 km, friction could be absent only if the crack were filled with a pore fluid of pressure equal to the total pressure; in this case the shear strength would be zero and seismic shocks could not arise. (Author)
Island arcs and convection by E Orowan( Book )

2 editions published in 1966 in English and held by 5 WorldCat member libraries worldwide

If island arcs are the outcrops of compressive faults, they cannot be products of a uniform field of compressive stress because their symmetry is lower. The polarity of the curvature, however, is provided if the compression is of convective origin. Incipient faulting is then followed by a convergence of the convective flow towards the fault, causing a convergence of the initially parallel stress trajectories. Since the fault propagates at right angle to the trajectories of maximum compressive stress, its outcrop becomes an arc convex towards the upstream side. In oceanic compressive faults due to convection the two conjugate fault planes are not equivalent because overthrusting of the downstream side by the upstream side would lead to the accumulation of a thick crust which would inhibit the progress of faulting along the plane, and because underthrusting is libricated by decomposing serpentine, fluxed basalt etc. This seems the reason why apparently in all long-lived oceanic compressive faults the upstream (usually the oceanward) side underthrusts the downstream side. (Author)
Fault displacement and seismic mechanism in shallow-focus earthquakes by E Orowan( Book )

2 editions published between 1960 and 1966 in English and held by 5 WorldCat member libraries worldwide

If, as found by Press and Jackson in the 1964 Alaska earthquake, the fault reaches down to depths of 100 or 200 km, the observed fault displacement at the surface corresponds to a stress drop of the order of 10 bar at the fault, far less than is compatible even with the low compressive strengths measured by Raleigh and Paterson on decomposing serpentine. Since the discrepancy cannot be explained by the frictional restraint of the Coulomb layer, it is suggested that the small stress drop has two other causes: First, the fault layer hardens with increasing displacement by the branching of cracks and rotation of the blocks between them; second, there is an aseismic layer between the Coulomb layer and the Raleigh-Paterson region which is too soft to permit frictional fracture and does not contain materials of low fracture strength such as decomposing serpentine. Calculations on this basis give consistent values both of the fault displacement and the energy release. The mean annual displacement of seismic faults reflects displacements between the adjacent continental and oceanic blocks; the mean velocity of displacement is of the order of centimeters per year. If this were the consequence of a contraction or expansion of the earth rather than of convection, the earth's radius would change by 1000 km or more in 200 million years, unless seismic activity of the present intensity existed only during a very small fraction of the life of the earth. (Author)
Physical Basis of Adhesion( Book )

3 editions published between 1972 and 1973 in English and held by 4 WorldCat member libraries worldwide

This paper discusses adhesion in relation to fracture of glassy polymers. Polystyrene is examined for crack propagation and crazing
Physics of the seismic source by E Orowan( Book )

2 editions published in 1965 in English and held by 4 WorldCat member libraries worldwide

The 'fault source' and the 'double-couple source' are discussed as possible mechanisms of seismic shock generation
The Darwin Rise and the origin of the continents by E Orowan( Book )

2 editions published in 1965 in English and held by 3 WorldCat member libraries worldwide

The Darwin Rise across the Pacific may be the remnant of a recently subsided but ancient oceanic ridge created by the upwelling of the single-cell convection which, according to Hills and Jeffreys, had swept together the primeval continent and opened up the Pacific. In a modified form this theory is immune to objections raised in the past, and it may provide a basis for understanding the cause of the Taylor-Wegener continental disruption, of the approximate equality of continental and oceanic heat flow, of polar wandering, and other phenomena. (Author)
Origin of surface features of the moon by E Orowan( Book )

3 editions published in 1973 in English and held by 3 WorldCat member libraries worldwide

The usual lava-pool hypothesis of lunar tectonics seem incompatible with numerous features of the lunar surface, in addition to leaving other features unexplained. The lunar-body hypothesis, on the other hand, does not encounter similar difficulties and it provides simple explanations for many hitherto puzzling characteristics of the lunar surface. A simple calculation combining the Hertz theory of elastic contact with the Griffith biaxial theory of fracture explains the flatness of the crater floor, and the terraced wall; the polygonal shape of the identation craters and the tangential rays around them are inertia effects due to the near-sonic velocity of crack propagation. (Modified author abstract)
Mechanical properties of crust and mantle( Book )

1 edition published in 1965 in English and held by 3 WorldCat member libraries worldwide

Mechanical behavior of materials by F. A McClintock( )

3 editions published in 1966 in English and held by 3 WorldCat member libraries worldwide

The condition of high-velocity ductile fracture by E Orowan( Book )

2 editions published in 1954 in English and held by 2 WorldCat member libraries worldwide

The initiation of brittle fracture by wedge penetration by E Orowan( Book )

2 editions published in 1954 in English and held by 2 WorldCat member libraries worldwide

 
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Audience Level
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Audience Level
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Audience level: 0.64 (from 0.56 for Mechanical ... to 1.00 for Papers, ...)

Physics of strength and plasticity
Covers
Alternative Names
Egon Orován fisico ungherese

Egon Orowan

Egon Orowan Hongaars natuurkundige (1902-1989)

Egon Orowan physicist

Egon Orowan węgierski fizyk i inżynier

Orován, Egon 1902-1989

Orowan, Egon 1902-

Orowan, Egon 1902-1989

Орован, Егон

إيجون أوروان

ایگون اوروان فیزیک‌دان و مهندس اهل مجارستان

ഈഗോൺ ഓറോവൻ

エゴン・オロワン

埃贡·欧罗万

艾貢·歐羅萬

Languages
English (48)

German (11)