Category Archives: Newton

Column buckling under multiple loads

Posted on January 20, 2020 by

Following another buckling discussion at Eng-tips I have modified my Frame4-buckle spreadsheet to allow input of multiple axial loads at any point along the column, along with any number of sections with different section properties.  Background on the method used … Continue reading →

Posted in AlgLib, Beam Bending, Excel, Finite Element Analysis, Frame Analysis, Newton, UDFs, VBA | Tagged , , , , , , , , , | Leave a comment

Trinity Bridge and Bridge of the Month

Posted on January 9, 2020 by

Bill Harvey has been doing a monthly report on historical bridges for many years, but recent issues have the added interest of interactive 3D models of the selected bridges. The Trinity Bridge at Crowland in South Lincolnshire is an excellent … Continue reading →

Posted in Arch structures, Historic Bridges, Newton | Tagged , , , | Leave a comment

Python Traps

Posted on January 1, 2020 by

When converting existing VBA code to Python there are a number of obvious changes to the syntax that need to be made for the code to run at all, but there are also a number of not so obvious traps … Continue reading →

Posted in Arrays, Excel, Link to Python, Newton, NumPy and SciPy, PyXLL, UDFs, VBA | Tagged , , , , , , , , | Leave a comment

Biaxial bending update

Posted on November 21, 2019 by

The reinforced concrete biaxial bending spreadsheet has now been updated: Stress block and capacity reduction factors updated for AS 3600-2018 ACI factors for US customary units used when stress is entered in ksi or psi units Example data updated The … Continue reading →

Posted in Beam Bending, Concrete, Newton | Tagged , , , , , , , , | 8 Comments

More powers of 3

Posted on October 20, 2019 by

Following the discovery of a question to which the answer is 42, the same team has now reported a sum of three cubes equal to 3.  As before, the result can be checked from Excel, linking to mpmath, via pyxll. … Continue reading →

Posted in Computing - general, Excel, Link to Python, Maths, Newton, PyXLL | Tagged , , , , , | Leave a comment

The answer to Life the Universe and Everything …

Posted on September 19, 2019 by

is 42, as is well-known: The actual question, to which the answer is 42, is not known, but a lesser known long standing question involving this number has recently been solved: The original problem, set in 1954 at the University … Continue reading →

Posted in Computing - general, Excel, Maths, Newton, PyXLL | Tagged , , , , | 5 Comments

Plotting Mandelbrot

Posted on September 15, 2019 by

There are many sites discussing the Mandelbrot Set, but not many examples using VBA to plot the set in Excel, so here is my effort: The spreadsheet (including open source VBA code) may be downloaded from: Mandelbrot chart.zip Note that … Continue reading →

Posted in Charts, Charts, Coordinate Geometry, Drawing, Excel, Maths, Newton, VBA | Tagged , , , | 3 Comments