Talk:Three-point flexural test

Model of beam support
What is the model you are using for the support of these beams? I think it should be simply supported. Quicknick5k (talk) 20:57, 19 June 2019 (UTC)Quicknick5k

Sources for equations
where did you get these equations?

can you provide any references? —Preceding unsigned comment added by 76.230.103.131 (talk) 19:57, 15 February 2008 (UTC)

Figure is not correct?
Curvatures of load points are wrong... —Preceding unsigned comment added by 155.130.107.42 (talk) 17:23, 15 June 2009 (UTC)


 * What are you asking? I can't decipher it. Wizard191 (talk) 18:31, 15 June 2009 (UTC)

Incorrect formula?
I think the formula for circular cross section is wrong. I do not have a reference to back up my argument. I derive it myself. For circular cross section, the moment of inertia is $$ I = \frac{\pi R^4}{4}$$, the maximum stress is $$\sigma_{f} = \frac{PL}{4Z} = \frac{PLR}{4I} = \frac{PL}{\pi R^3}$$, instead of the value $$\frac{3 P L}{\pi R^3}$$ showing on the page.

Can someone confirm it? — Preceding unsigned comment added by 216.165.95.71 (talk) 19:19, 8 September 2011 (UTC)

As seen in the article itself, someone added a reference. I also confirmed this using the source, Fundamentals of Materials Science and Engineering: An Integrated Approach, 4th ed. by Callister & Rethwisch. p. 223. — Preceding unsigned comment added by 144.216.6.120 (talk) 17:36, 4 April 2018 (UTC)