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These two interactions will both strengthen the material in different ways. If two equivalently charged fields come in contact and are confined to a particular region, excessive force is needed to overcome the repulsive forces needed to elicit dislocation movement past one another. If two oppositely charged fields come into contact with one another they will merge with one another to form a jog. A jog can be modelled as a potential well that traps dislocations. Thus, excessive force is needed to force the dislocations apart. Since dislocation motion is the primary mechanism behind plastic deformation, increasing the stress required to move dislocations directly increases the yield strength of the material.
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associated with it. The creation of these stress fields is a result of the material trying to dissipate mechanical energy that is being exerted on the material. By convention, these dislocations are labelled as either positive or negative depending on whether the stress field of the dislocation is mostly compressive or tensile.
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and this stretching causes the stress field to form. Atomic bonds farther and farther away from the dislocation centre are less and less stretched which is why the stress field dissipates as the distance from the dislocation centre increases. Each dislocation within the material has a stress field
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field) charges we can understand how dislocations interact with each other in the lattice. If two like fields come in contact with one another they will be repelled by one another. On the other hand, if two opposing charges come into contact with one another they will be attracted to one another.
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for materials. Stress fields can be created by adding different sized atoms to the lattice (solute strengthening). If a smaller atom is added to the lattice a tensile stress field is created. The atomic bonds are longer due to the smaller radius of the solute atom. Similarly, if a larger atom is
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added to the lattice a compressive stress field is created. The atomic bonds are shorter due to the larger radius of the solute atom. The stress fields created by adding solute atoms form the basis of the material strengthening process that occurs in
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is the distribution of internal forces in a body that balance a given set of external forces. Stress fields are widely used in
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Distribution of internal forces in a body that balance a given set of external forces
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141:. The bonds are clearly stretched around the location of the
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133:. Consider that one can picture the stress fields as the
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The theory of stress fields can be applied to various
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created by adding an extra half plane of atoms to a
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183:, Springer, 2010. Chapter 1, Introduction, page 1
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109:Learn how and when to remove this message
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47:adding citations to reliable sources
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452:List of tectonic plate interactions
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181:Stress Field of the Earth's Crust
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34:needs additional citations for
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179:Arno Zang, Ove Stephansson,
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537:Thick-skinned deformation
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542:Thin-skinned deformation
318:Stereographic projection
163:strengthening mechanisms
308:Orthographic projection
291:Measurement conventions
237:Lamé's stress ellipsoid
819:Paleostress inversion
512:Strike-slip tectonics
382:Extensional tectonics
362:Continental collision
232:Deformation mechanism
397:Fold and thrust belt
153:field) or negative (
43:improve this article
896:Classical mechanics
829:Section restoration
705:Rock microstructure
367:Convergent boundary
267:Strain partitioning
252:Overburden pressure
242:Mohr–Coulomb theory
806:Kinematic analysis
462:Mountain formation
377:Divergent boundary
342:Accretionary wedge
218:Structural geology
901:Materials science
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814:3D fold evolution
700:Pressure solution
695:Oblique foliation
575:Exfoliation joint
565:Columnar jointing
225:Underlying theory
131:materials science
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618:Detachment fault
613:Cataclastic rock
547:Thrust tectonics
517:Structural basin
492:Pull-apart basin
432:Horst and graben
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437:Intra-arc basin
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174:Further reading
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60: –
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54:Find sources:
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32:This article
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21:
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643:Thrust fault
332:Large-scale
303:Inclinometer
277:Stress field
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180:
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123:stress field
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99:October 2017
96:
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41:Please help
36:verification
33:
824:Paleostress
710:Slickenside
685:Crenulation
638:Fault trace
633:Fault scarp
623:Disturbance
608:Cataclasite
497:Rift valley
417:Half-graben
387:Fault block
372:DĂ©collement
151:compressive
143:dislocation
890:Categories
852:Pure shear
839:Shear zone
796:Competence
680:Compaction
557:Fracturing
352:Autochthon
347:Allochthon
69:newspapers
788:Boudinage
768:Monocline
763:Homocline
743:Anticline
725:Tectonite
715:Stylolite
690:Fissility
667:lineation
663:Foliation
527:Syneclise
472:Obduction
442:Inversion
334:tectonics
875:Category
847:Mylonite
778:Vergence
773:Syncline
675:Cleavage
600:Faulting
748:Chevron
735:Folding
580:Fissure
532:Terrane
477:Orogeny
457:MĂ©lange
392:Fenster
282:Tension
155:tensile
139:crystal
83:scholar
522:Suture
507:Saddle
447:Klippe
412:Graben
272:Stress
262:Strain
168:alloys
135:stress
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857:Shear
585:Joint
467:Nappe
427:Horst
422:Horse
90:JSTOR
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570:Dike
502:Rift
313:Rake
129:and
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