Talk:Fracture mechanics

Wiki Education Foundation-supported course assignment
This article was the subject of a Wiki Education Foundation-supported course assignment, between 8 April 2019 and 20 May 2019. Further details are available on the course page. Student editor(s): JPMulderrig, Tpm92.

Above undated message substituted from Template:Dashboard.wikiedu.org assignment by PrimeBOT (talk) 21:45, 16 January 2022 (UTC)

Comments
I have added a link to the recently created wikipedia page of Fracture of Soft materials, to extend the knowledge of fracture mechanics to materials that need a special formulation that diverges from the general one. Please let me know if you have any comments. FernandaFontenele (talk) 18:32, 17 May 2019 (UTC)

I have revised the Introductory section in order to emphasize that Fracture Mchanics has equal parts of materials science and solid mechanics. I also have a problem with the statement that Fracture Mechanics has uses in design of new materials. This may be the case, but I would be happier if some examples had been provided.Al Rosenfield 21:13, 21 November 2005

The article needs to be extended to include elastic/plastic and fully-plastic regimes. Also, the discussion of crack origin needs to be extended.Al Rosenfield, 29 NOV. 2005

I have taken material from this section and put it into the article on Fracture Toughness, where it is more appropriate. Al Rosenfield 21:10, 3 January 2006 (UTC)

Additional introductory material added Al Rosenfield 21:10, 4 January 2006 (UTC)

I see no mention of E. Orowan's contribution to fracture mechanics. He modified Griffith's equation by adding the necessary plastic work required to extend a crack wall. This was proposed in E. Orowan, in "Fatigue and Fracture of Metals," Symposium at Massachusetts Institute of Technology, John Wiley & Sons, Inc., New York, 1952. I would like to add some details about his modifications from G.E. Dieter's Mechanical Metallurgy (1988 McGraw Hill) Sirkha 02:23, 10 December 2006 (UTC)

Is fractal mechanics this?
Coming from the article Alexander Balankin, I was non-plussed at the term "fractal mechanics". After a moderate amount of Googling book/article references, there must be such a thing. Is fractal mechanics the same as Fracture mechanics? If so, a redirect is warranted. However I don't see the term 'fractal' used as such in this article. Shenme (talk) 07:43, 16 February 2008 (UTC) - Fracture mechanics - the mechanical behavior of bodies containing cracks
 * It would appear from the following abstract that fractal mechanics is altogether different:

- Fractal Mechanics - the mechanical behavior of bodies of fractal dimension

For the latter, see Fractal mechanics Epstein, Marcelo; Śniatycki, Jędrzej Physica D: Nonlinear Phenomena, Volume 220, Issue 1, p. 54-68. "A mechanical theory of fractals and of non-smooth objects in general is developed on the basis of the theory of differential spaces of Sikorski. Once the (generally infinite dimensional) configuration space is identified, an extended form of the principle of virtual work is used to define the concept of generalized force and stress. For the case of self-similar fractals, an appropriate integration based on the Hausdorff measure is introduced and applied to the numerical formulation of stiffness matrices of some common fractals, which can be used in a finite element implementation."

Perhaps someone who understands this could start an article? .John M Brear (talk) 19:38, 28 May 2013 (UTC)

Griffith's theory ignored?
According to the Alan Arnold Griffith article, his work led directly to changes in engineering design, rather than being ignored as it says here. I have struggled to find support for either viewpoint. Anyone able to help me out? Mikenorton (talk) 16:16, 27 May 2008 (UTC)
 * I'm adding a paragraph from Prof. Erogan's Fracture Mechanics, Int. J. Solids Struct., 2000, 37, p. 175 in support of the ignored thesis. Bbanerje (talk) 06:30, 30 May 2008 (UTC)
 * Thanks for that, and all your other efforts on this page. Mikenorton (talk) 10:57, 1 June 2008 (UTC)

Is failure mechanism under fracture mechanics?
Does failure mechanism of fiber-reinforced composites (such as delamination, intralaminar matrix cracking, longitudinal matrix splitting, fiber/matrix debonding, fiber pull-out, and fiber fracture) fall under fracture mechanics? Thanks. Kerina yin (talk) 04:27, 31 March 2009 (UTC)

The "need" section is un-needed
The study of fracture mechanics is a human endeavor. It doesn't need justification any more than astronomy or geology.

I think the "need" section is entirely superfluous and should be removed.

(I like the picture of the bridge, though. :-) Saintrain (talk) 17:42, 23 September 2009 (UTC)


 * Maybe a bit of that section could be included as a preamble to the 'History' section, to explain why such an approach came about (then you could keep the bridge). Mikenorton (talk) 18:53, 23 September 2009 (UTC)


 * Concur. Goings once ...
 * Saintrain (talk) 01:06, 27 September 2009 (UTC)

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Student assignment
I am going to ask my class this semester (Spring 2019) to make improvements to this and related pages. If anyone has any suggestions for things they'd like to be better explained, or any objections, please let me know. AlanZehnder (talk) 19:22, 8 January 2019 (UTC)
 * Thanks Alan. Will be interesting to see what your students add on the topic. Bbanerje (talk) 20:24, 14 January 2019 (UTC)

Hey all, I am a student in Prof. Alan Zehnder's Fracture Mechanics class. For my assignment, I have created content that I would like to add to this page on the following topics: Crack Growth, Predicting Crack Growth, and Crack Path Stability. I would like to add this content at the end of the "Linear Elastic Fracture Mechanics" section (immediately after the "Limitations" subsection). The following is a link to my sandbox, which currently contains the aforementioned content: https://en.wikipedia.org/wiki/User:JPMulderrig/sandbox. I plan on posting the content in my sandbox to this page on Friday, May 17, 2019 at 1 pm EST. --JPMulderrig (talk) 20:05, 14 May 2019 (UTC). Hey all, I decided to add my content to the page now instead of tomorrow at 1 pm EST. At that time, I will check this page to make sure that my content is intact, and then I will send a confirmation email to my instructor, Prof. Alan Zehnder, letting him know that I successfully uploaded my assigned content to this Wikipedia article. By doing that, I will be officially "turning in" my project for him to review. --JPMulderrig (talk) 23:07, 16 May 2019 (UTC)

Merger proposal
I propose merging Concrete fracture analysis into Fracture mechanics. It doesn't seem obvious to me that concrete, specifically, merits its own article; most of the content there seems redundant to content here, and much of the rest seems overspecialized for inclusion in the first place. Moriwen (talk) 14:04, 6 April 2023 (UTC)

I support the merger. The concrete article has very little that is unique to concrete. The dugdale and barrenblatt model discussion is already covered in Cohesive zone model (but they could certainly do with some expansion there). A lot of the article is either very poor or just gobbledygook. NeedsGlasses (talk) 23:30, 6 April 2023 (UTC)

Support; while there's a body of research about concrete fracturing, the concrete article does not seem salvageable in its current form. I'm not sure there's even enough sourced discussion of concrete fracture analysis to create a section in this article about concrete. – SJ + 16:05, 8 April 2023 (UTC)
 * I slimmed it down to a few sourced statements, see if any seem worth including here. Perhaps a section on examples related to specific materials?  – SJ +  16:39, 8 April 2023 (UTC)
 * While I support your edits on removing fluff on the concrete article. You have made things worse. We were having a trial on the future of the article and you have seen fit to take justice into your own hands before the jury has returned. Wikipedia barely functions on a level of group interaction in dealing with articles. Your efforts today have not helped that system. NeedsGlasses (talk) 23:49, 8 April 2023 (UTC)


 * ✅ Klbrain (talk) 13:59, 30 September 2023 (UTC)