Category Archives: Newton

Numerical Integration; Tanh-Sinh Quadrature v. 4.4

Posted on November 23, 2018 by

Update 27 Nov 2018: Version 4.41 now available from the link below, with minor modifications for compatibility with Excel 2007. I recently received a new version (4.4) of the numerical integration spreadsheet by Graeme Dennes which is now available for … Continue reading →

Posted in Charts, Excel, Maths, Newton, Numerical integration, UDFs, VBA | Tagged , , , , , , , , | 9 Comments

AS 3600 and RC Design Functions 8.01

Posted on November 13, 2018 by

The updated RC Design Functions spreadsheet (presented here) included an updated UMom function to find the ultimate strength of a rectangular section under combined bending and axial load; but I omitted to include the revisions to the alpha2 and Gamma … Continue reading →

Posted in Beam Bending, Concrete, Excel, Newton, UDFs, VBA | Tagged , , , , , , | Leave a comment

Falling feathers and hammers

Posted on November 9, 2018 by

It is well known that at the end of the Apollo 15 Moon landing, Commander David Scott dropped a hammer and a feather to demonstrate that they would accelerate at the  same rate, and land on the ground together: What is … Continue reading →

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More iterative solvers

Posted on October 28, 2018 by

Following the recent post on using Brent’s Method solvers on an array (Iterative solvers and arrays), here is another example with an engineering related problem.  The example is included in the xlScipy3 spreadsheet, which can be downloaded from: xlScipy3.zip The depth … Continue reading →

Posted in Arrays, Beam Bending, Concrete, Excel, Link to Python, Maths, Newton, NumPy and SciPy, UDFs, VBA, xlwings | Tagged , , , , , , , , | Leave a comment

Iterative solvers and arrays

Posted on October 21, 2018 by

A recent thread at Eng-Tips was looking for a solution to the problem described  below: The solutions to this problem described below can be downloaded from: ItSolve.zip and xlScipy3.zip The ItSolve.xlsb spreadsheet contains a user defined function (UDF) to solve iterative … Continue reading →

Posted in Arrays, Charts, Excel, Link to Python, Maths, Newton, NumPy and SciPy, UDFs, VBA, xlwings | Tagged , , , , , , , | 1 Comment

Australian Greenhouse Gas Emissions

Posted on October 3, 2018 by

What the Australian  Government says: PM claims Australia will meet Paris target ‘in a canter’ despite emissions climbing. Morrison says rate of increase not as high as previous years and renewables investment will ensure Australia meets commitment pm-claims-australia-will-meet-paris-target-in-a-canter-despite-emissions-climbing What the … Continue reading →

Posted in Climate, Newton | Tagged , , | 1 Comment

New AS 3600 and RC Design Functions 8

Posted on September 23, 2018 by

A revised version of the Australian Concrete Structures code, AS 3600, was recently published, with many significant changes, including: Changes to ULS reduction Factors Creep and shrinkage Curvature and deflection calculations Crack width calculation and stress limits Major  changes to … Continue reading →

Posted in Concrete, Newton, UDFs, VBA | Tagged , , , , , | 1 Comment