Understanding Crystal Dislocations: A Mathematical Approach

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SUMMARY

The discussion focuses on the mathematical theory of crystal dislocations, emphasizing the role of Burgers' vectors and strain responses to applied stress. Participants recommend several authoritative texts, including "Elementary Dislocation Theory" by Johannes Weertman and Julia R. Weertman, and a manuscript by Prof. Sir Bhadesia. Key references also include Hirth's historical overview of dislocation theory and sections from Landau and Lifshitz's work on elasticity. The conversation highlights the complexity of dislocation mechanisms and the need for formal mathematical frameworks.

PREREQUISITES
  • Understanding of crystal structure and dislocation theory
  • Familiarity with tensors and their applications in materials science
  • Knowledge of stress-strain relationships in crystalline materials
  • Basic comprehension of elasticity theory
NEXT STEPS
  • Study "Elementary Dislocation Theory" by Johannes Weertman and Julia R. Weertman
  • Explore the manuscript by Prof. Sir Bhadesia on crystal dislocations
  • Read Hirth's "A brief history of dislocation theory" for historical context
  • Investigate Landau and Lifshitz's sections on dislocations in elasticity theory
USEFUL FOR

Materials scientists, mechanical engineers, and students studying crystallography or solid mechanics will benefit from this discussion, particularly those focusing on the mathematical aspects of dislocation theory.

etotheipi
I'm in not too urgent (but a little pressing, i.e. I have an assignment on this due Friday... 😣 ) need of some reference that treats the theory of dislocations in crystal with a mathematical emphasis (i.e. tensors); specifically, pertaining to Burgers' vectors and the strain response to applied stress in crystals containing dislocations. Does such a reference exist?

The lecturer recommended Callister but it's general purpose and doesn't go into enough detail on this section.

Thanks!
 
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Or even an internet reference, to be honest. I don't think I'd consider buying a book unless I could use it for other stuff too.

A few minutes ago I did find a free manuscript by Prof Sir Bhadesia
https://www.phase-trans.msm.cam.ac.uk/2001/crystal.html

think that's got a few bits in it but a little strange notation (Mackenzie & Bowles?). Maybe, worth a shot.
 
Your going to be disappointed. The problem is that the number density of dislocations is high and that mechanisms abound. So the focus has not been on formalism.
 
This paper
Hirth, J.P. A brief history of dislocation theory. Metall Mater Trans A 16, 2085–2090 (1985). https://doi.org/10.1007/BF02670413

has this paragraph

Brown,52while considering magnetic properties of dis- locations, originated the concept of smearing discrete dislocations into a continuous array of infinitesimal dis- locations. This method has resulted in connections with powerful methods of mathematics but describes properties of the net dislocation density and has some problems in uniqueness and the description of arrays of dislocations of opposite sign. In early work, Nye53described the connec- tion between the net dislocation density tensor and the lat- tice curvature. Kondo54and Bilby, Bullough, and Smith55 showed that the Cartan torsion of space is the continuum equivalent of the dislocation, with the Cartan circuit closely related to the Burgers circuit.56The latter authors used the continuum description to derive the geometric properties of grain boundaries. Kr/Sners7 developed the concept of the incompatibility, proportional to derivatives of the dislocation density, and descriptions of the elastic fields in terms of it. Further advances are discussed in several reviews. 57.58,59

and refs 52-59
52. W.E Brown: Phys. Rev., 1941, vol. 60, p. 139.
53. J. E Nye: Acta MetaU., 1953, vol. 1, p. 153.
54. K. Kondo: RAAG Memoirs of the Unifying Study of the Basic Prob-
lems in Engineering Sciences by Means of Geometry, Gakujutsu Buuken Fukyu-Kai, Tokyo, 1955, vol. I, p. 453; also see Ref. 46, p. 761.
55. B.A. Bilby, R. Bullough, and E. Smith: Proc. Roy. Soc. London, 1955, vol. A231, p. 263.
56. E. KriJner: in Dislocation Modeling of Physical Systems, M.F. Ashby, R. Bullough, C. S. Hartley, and J. P. Hirth, eds., Pergamon, Oxford, 1981, p. 285.
57. E. Kr/Sner: Ergeb. angew. Math, 1958, vol. 5, p. 1.
58. E. Cosserat and F. Cosserat: Theorie des Corps Deformables,
Herman, Pads, 1909.
59. Mechanics of Generalized Media, E. KriSner, ed., Springer, Berlin,
1968.
 
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thanks, I'll take a look and see which of those I can access! should be some useful stuff in there.

was also going to say that I discovered that Landau/Lifshitz wrote a little section on dislocations near the end of vol. 7 on elasticity theory... think I hit the jackpot, there 😍
 
FUNDAMENTAL ASPECTS OF DISLOCATION THEORY, Conference Proceedings, April 1969
https://www.govinfo.gov/content/pkg...VPUB-C13-3e85db87f8d45249963643f05e447bd7.pdf

A classic text - Elementary Dislocation Theory
Johannes Weertman and Julia R. Weertman, Published: 25 June 1992
https://global.oup.com/academic/product/elementary-dislocation-theory-9780195069006?cc=us&lang=en&#

J. Weertman, Theory of Steady‐State Creep Based on Dislocation Climb Journal of Applied Physics 26, 1213 (1955); https://doi.org/10.1063/1.1721875 - see the references of folks like Sherby, Dorn and Mott
https://aip.scitation.org/doi/pdf/10.1063/1.1721875
 
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