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Topic: Deformation

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In the News (Mon 18 Mar 19)

Enormous stress is imposed on the crust at the boundaries of the lithospheric plates and where convection currents in the mantle tug and tear at the crust above.
The reaction of rock material to an imposed stress depends on the temperature and pressure conditions.
During plastic deformation mineral bonds adjust to the stress by breaking, moving about, and then reforming.
www.uwsp.edu /geo/faculty/ritter/geog101/textbook/tectonics_landforms/deformation.html   (407 words)

  NationMaster - Encyclopedia: Plastic deformation
In 1934, Egon Orowan, Michael Polanyi and Geoffrey Ingram Taylor, roughly simultaneously, realised that the plastic deformation of ductile materials could be explained in terms of the theory of dislocations.
One of the best-known examples of this is nitinol, which exhibits pseudoelasticity: deformations which are reversible in the context of mechanical design, but irreversible in terms of thermodynamics.
In reality, many materials which undergo large elastic and plastic deformations, such as steel, are able to absorb stresses which would cause brittle materials, such as glass, with minimal elastic and plastic deformation ranges, to break.
www.nationmaster.com /encyclopedia/Plastic-deformation   (499 words)

 Deformation of Rock
Ductile Deformation -- wherein the strain is irreversible.
Abrupt deformation along faults, usually associated with earthquakes caused by the fracture of rocks occurs on a time scale of minutes or seconds.
Gradual deformation along faults or in areas of uplift or subsidence can be measured over periods of months to years with sensitive measuring instruments.
www.tulane.edu /~sanelson/geol111/deform.htm   (2487 words)

 Deformation bands
Deformation band faults are solely the result of a displacement gradient (over a narrow tabular zone), in contrast to faults with slip surface which must include a displacement discontinuity.
The zones of deformation band faults are thought to grow by addition of new deformation band faults, side by side, thus the thickness of the zone depends on the number and spacing of individual deformation band faults.
The shifting of deformation is thought to be due to strain hardening via increased grain friction in the bands during grain breaking and porosity reduction processes.
www.ig.tuwien.ac.at /Research/Research_deformation_bands.htm   (885 words)

 Highbeam Encyclopedia - Search Results for deformation
Ability of a deformed material body to return to its original shape and size when the forces causing deformation are removed.
Droplet deformation in immiscible polymer blends during transient uniaxial elongational flow.
Plastic behavior and deformation textures of poly(etherether ketone) under uniaxial tension and simple shear.
www.encyclopedia.com /searchpool.asp?target=deformation   (911 words)

 Inference of postseismic deformation mechanisms of the 1923 Kanto earthquake
Inference of postseismic deformation mechanisms of the 1923 Kanto earthquake
Postseismic deformation after the 1923 earthquake, however, is relatively poorly understood.
We revisit the available deformation data in order to constrain possible mechanisms of postseismic deformation and to examine the consequences for associated stress changes in the surrounding crust.
www.agu.org /pubs/crossref/2006/2005JB003901.shtml   (429 words)

In engineering mechanics, deformation is a change in shape due to an applied force.
Deformation is often described in terms of strain.
Deformation may be temporary, as a spring returns to its original length when tension is removed, or permanent as when an object is irreversibly bent or broken.
www.reference.com /browse/wiki/Deformation   (727 words)

 Autogenous Deformation   (Site not responding. Last check: )
Typically, autogenous deformation was measured simultaneously on two nominally identical specimens and the average result was reported.
The results reported in all plots are always relative to a deformation of zero at the time of set for the cement paste being evaluated.
After setting was achieved, the maximum standard deviation in relative deformation between readings made on companion specimens was 48.13 microstrains, with average standard deviations being in the range of 6.4 microstrains to 30 microstrains.
ciks.cbt.nist.gov /bentz/finedtu/node6.html   (212 words)

 Search Results for "deformation"
Deformation of a ferromagnetic material subjected to a magnetic field.
...The process of deformation by which the major features of the earth's crust, including continents, mountains, ocean beds, folds, and faults, are formed.
...disease characterized by the formation of neurofibromas, sometimes accompanied by physical deformation and a predisposition to brain tumors and various forms of cancer....
www.bartleby.com /cgi-bin/texis/webinator/sitesearch?FILTER=col61&x=10&y=12&query=deformation   (302 words)

 PlanetMath: deformation retract
The characters E,F,H,K,L,M,N, and T all deformation retract onto the charachter I, while the letter Q deformation retracts onto the letter O. "deformation retract" is owned by mathcam.
Cross-references: characters, torus, circle, deformation, point, star-shaped, map, equivalence relation, retraction, continuous, identity mapping, mappings, collection, onto, topological spaces
This is version 8 of deformation retract, born on 2003-03-23, modified 2006-07-07.
planetmath.org /encyclopedia/DeformationRetraction.html   (154 words)

 Cranial Deformation
Deformation can either be intentional or unintentional, however this is difficult to determine from the skeletal record.  Intentional deformation is the result of attaching boards, pads, bandages, or stones to an infant skull (see Figs.
Unintentional deformation may be due to nutritional, hormonal, or genetic factors.  Preferred sleeping posture may also result in unintentional modification (Dingwall, 1931; Rhode and Arriaza, 2006).  Some individuals hypothesize that deformation first occurred as an unintentional result of the cradleboard and then became a method for intentional modification (Gerszten and Gerszten, 1995).
Princess of the House of Este(reprinted in Gerszten and Gerszten, 1995)
www.clas.ufl.edu /users/nparr/index_files/Page398.htm   (514 words)

 U of MD load deformation results
The repeated load permanent deformation tests were all performed at a test temperature of 100 degrees F with three levels of loading stress: 10 psi, 20 psi, and 30 psi (deviatoric stress at unconfined state).
Both the graphical and the tabular results for the repeated load permanent deformation tests are shown in Appendix G [omitted*] for all six mixes.
During testing, it was observed that at the end of the repeated load permanent deformation test, the deformation of the samples visually (and quite graphically) demonstrated the efficiency of the Elvaloy® modifier, as well as the influence of increased modifier percentage.
www.dupont.com /asphalt/load.html   (1585 words)

 Create clusters with properties for deformation
An AXIS deformation is the simplest of the deformations to use.
Deformation of the object varies depending on the position of the CURVE frame in relation to the object at the time it is attached.
For example, bending around a joint provides smooth deformation of arm geometry at an elbow (complete with bending and tucking), and bulging between two joints simulates the biceps as it flexes and influxes due to arm bending.
www.alias.com /eng/support/studiotools/documentation/Animating/deformingSurfaces6.html   (6282 words)

 Surface Edit > Global Deformation
For example, the deformation of the following plane is very different when the deformation region is scaled horizontally beyond the edges of the plane.
You may want to adjust this value based on the amount of memory your computer has (for example, set it to 2 if your computer has very little memory, or set it to 25 if your computer has a large amount of memory.) The default value is 10.
That is, select the surfaces you want to deform and any nearby surfaces that you want to remain continuous after the deformation.
www.alias.com /eng/support/studiotools/documentation/Reference/SurfaceEditGlobalDeformation.html   (604 words)

 Research project An integrated study of the interaction between deformation a ...
An integrated study of the interaction between deformation and fluids in a tectonic wrench context (Monts d'Arrée, Brittany, France).
The Monts d'Arrée is a linear deformation zone with a dominant vertical archtecture, formed during the Variscan orogeny in a tectonic wrench context.
This analysis consist of a geometrical and kinematic field study of the steep belt, a kinematic analysis of the celavage develop- ment, and a qualitative and quantitative strain analysis.
www.kuleuven.ac.be /research/researchdatabase/project/3E02/3E020005.htm   (149 words)

 Deformation Band - Meteorological Physical Background
is the total deformation, D is the horizontal wind divergence and b the angle between the axis of dilatation and the isentropes.
The Deformation Bands occur within cyclonic vorticity; in most of the cases investigated it could be found that when there is a maximum in the total deformation field, it often coincides with the respective maximum in the positive vorticity field.
Deformation Band cloudiness initially may also appear close to a jet (in the confluent flow zone), but it is often found near very slack upper level wind zones (for example, at a col, where the wind speed is basically zero).
www.zamg.ac.at /docu/Manual/SatManu/CMs/Def/backgr.htm   (1550 words)

 Fusion of 3D shapes and deformation tools (Philippe Decaudin)
Deformation techniques are often used to model the shape of geometric objects.
In order to deform the object, the 3D-space where it lies is continuously deformed so that the object is bumped and the shape of the bump corresponds to the simple 3D-shape.
Moreover, topological properties of the object are unchanged, and the volume variation of the deformed object is controlled by the volume delimited by the simple shape.
www.antisphere.com /Research/Deform.php   (383 words)

 Cell induced mirror deformation
Then, in the first case, the deformation must be calculated as caused by the mirror standing on its edge supports or sling.
Figure 3 shows the deformation when the mirror in a cell as shown in Figure 1A is pointed to the horizon.
However, since the deformation is mostly astigmatic it cannot be compensated by refocusing, and the deformation may therefore be considered as very bad.
home.hetnet.nl /~artm/atm/articles/deformation.html   (694 words)

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