User contributions for Tensorit

24 September 2022

• 22:1822:18, 24 September 2022 diff hist +136 m Del in cylindrical and spherical coordinates →Coordinate conversions: A single-argument arctangent is incorrect. Rather than change it in the formulas, a simple caution should suffice.

5 June 2022

• 13:5013:50, 5 June 2022 diff hist +19 L'Hôpital's rule Corrected wording to better indicate that there is not supposed to be an s in the Mathematician's name. Tags: Reverted Visual edit Mobile edit Mobile web edit

1 September 2021

• 21:1621:16, 1 September 2021 diff hist +1,316 Friction →Normal force
• 20:1320:13, 1 September 2021 diff hist +40 m Friction →Coefficient of friction

25 March 2021

• 07:2107:21, 25 March 2021 diff hist +2,971 Invariants of tensors Added a proper definition of invariant and a discussion of invariants of non-symmetric tensors

23 March 2019

• 00:1700:17, 23 March 2019 diff hist +246 User:Tensorit updated qualifications and updated professional title current
• 00:0900:09, 23 March 2019 diff hist +340 One-seventh area triangle Added a much-needed image (which I made using Mathematica) of the graphical solution. Tag: Visual edit

9 March 2019

• 22:2722:27, 9 March 2019 diff hist +1,042 Definite matrix Added insight into the physical meaning of positive definiteness
• 21:4921:49, 9 March 2019 diff hist +613 Definite matrix →Extension for non-symmetric square matrices: added an example of a non-positive-definite matrix having positive eigenvalues (please retain tildes to avoid the hook in the bracket from looking like a negative)
• 20:5820:58, 9 March 2019 diff hist +1 m Definite matrix The word "weaker" was changed to "broader" to be consistent with use of "narrower" elsewhere in the paragraph and to remove an inappropriate tone of judgement, as the broader definition is equivalent to (hence generalizes) the narrow one if M is Hermitian. Tag: Visual edit

20 May 2018

• 05:3005:30, 20 May 2018 diff hist +719 Rotation Expansion of axis section to include angle and alternative (non-spectral) methods
• 05:0805:08, 20 May 2018 diff hist +168 Rotation →External links: added link to new book on rotation
• 05:0705:07, 20 May 2018 diff hist +260 Rotation →Rotation axis in 3 dimensions: Eliminated superfluous discussion of elementary spectral theorems and supplemented spectral method with an alternative.
• 03:5703:57, 20 May 2018 diff hist +167 Euler angles →External links
• 03:5003:50, 20 May 2018 diff hist +167 Rotation →External links
• 03:4503:45, 20 May 2018 diff hist +2,958 Rotation replaced opening animation with a general rotation and edited definition appropriately
• 02:2302:23, 20 May 2018 diff hist +161 m Lambert azimuthal equal-area projection →Applications: added a reference to the use of Lambert in statistics on the sphere.
• 02:0002:00, 20 May 2018 diff hist +1,935 Lambert azimuthal equal-area projection Added animation of a generalized Lambert projection Tag: Visual edit: Switched

4 May 2018

• 17:4217:42, 4 May 2018 diff hist +918 Deborah number →Definition: Added a qualitative intro to the quantitative definition. Tags: Mobile edit Mobile web edit
• 17:3417:34, 4 May 2018 diff hist −542 Deborah number Removed the qualitative details about the definition (to be moved to another section). Tags: Mobile edit Mobile web edit
• 17:1817:18, 4 May 2018 diff hist +454 Deborah number clarified the definition Tags: Mobile edit Mobile web edit

27 April 2018

• 00:2900:29, 27 April 2018 diff hist +824 m Finite strain theory Minor grammar corrections and improved phrasing for clarity. One relatively significant correction replaced coordinate directions with stretch eigenvector directions. Tag: Visual edit

28 September 2017

• 21:2121:21, 28 September 2017 diff hist +529 Patch test (finite elements) Clarified wording to require a patch test to be solvable EXACTLY by the numerical method. Tag: Visual edit: Switched

13 March 2016

• 23:2823:28, 13 March 2016 diff hist +406 Objective stress rate Added citations to support some of the content in the article and flagged unsubstantiated assertion about recent trends in modeling.
• 23:1923:19, 13 March 2016 diff hist +2,531 Hypoelastic material Added the more rigorous and historically significant Truesdell-Noll definition of hypoelasticity and made minor edits for clarity.
• 22:2722:27, 13 March 2016 diff hist +1,159 Elasticity (physics) →Finite elasticity: In addition to editing for grammar and clarity, removed the incorrect assertion that a Cauchy-elastic material allows stress to be a function of strain (which fails to properly include material rotation of anisotropic media).

3 March 2016

• 00:4400:44, 3 March 2016 diff hist +1,900 Elasticity (physics) →Hypoelastic materials: Replaced the limited definition with the rigorous and substantiated one from seminal literature and added statement about dispute regarding whether or not hyperelasticity and hypoelasticity should be mutually exclusive.

2 March 2016

• 23:3423:34, 2 March 2016 diff hist +30 Elasticity (physics) →Linear elasticity: Removed nonstandard negative in the spring equation and gave a name to the fourth-order stiffness tensor.
• 23:2823:28, 2 March 2016 diff hist +353 Elasticity (physics) →Overview: Corrected the definition of internal energy and removed some unsubstantiated editorializing about certain approaches being preferred.

25 February 2016

• 00:4700:47, 25 February 2016 diff hist +110 Elasticity (physics) No edit summary

23 February 2016

• 08:2208:22, 23 February 2016 diff hist +232 Hyperelastic material →Cauchy stress

13 June 2015

• 02:4302:43, 13 June 2015 diff hist −6 Truss Grammar (moved misplaced modifier) and word usage (replaced "generally" with "typically") Tags: Mobile edit Mobile web edit

17 September 2014

• 07:2307:23, 17 September 2014 diff hist +519 Truss Corrected some myths about whether or not triangles are necessary for stability and added a conflicting definition of "simple truss."
• 06:3706:37, 17 September 2014 diff hist +346 Truss →Characteristics of trusses

16 September 2014

• 05:5505:55, 16 September 2014 diff hist +777 Direct stiffness method →Assembly: Showed a more easily remembered and easily generalized form of the stiffness using direction cosines
• 04:4304:43, 16 September 2014 diff hist +2 Truss Corrected definition of truss and ISBN of supporting literature
• 04:3704:37, 16 September 2014 diff hist +638 Truss Changed the definition of a truss to something simple, rigorous, and testable (and supported in the literature)
• 04:1504:15, 16 September 2014 diff hist +336 Ted Belytschko Added his date of death and changed "is" to "was"

17 October 2011

• 03:3703:37, 17 October 2011 diff hist 0 Neo-Hookean solid →Compressible neo-Hookean material: Coefficient in small-strain version needed to be a 4, not 2 (as can be confirmed indirectly by the need for this change to match Hooke's law using C_1=\mu/2)

29 January 2011

• 00:4200:42, 29 January 2011 diff hist −2 m Material point method grammar correction
• 00:4000:40, 29 January 2011 diff hist +151 N User:Tensorit Created abbreviated bio.