FWD Backcalculation with ELLEA1 - Tutorial

This tutorial explains how to utilize the ELLEA1 code for the purpose of performing quasi-static backcalculation of falling weight deflectometer (FWD) measurements. Essentially, it demonstrates how ELLEA1 can be treated as a "subroutine" that is controlled by Excel's Solver. This approach is applicable to many problem types, extending the utility of the ELLEA1 code far beyond FWD backcalculation. The ELLEA1 worksheet is (and always has been) completely free to use and distribute, downloadable from: (i) https://www.academia.edu/8252546/ELLEA1_Isotropic_Layered_Elasticity_in_Excel (ii) https://orbit.dtu.dk/en/activities/ellea1-isotropic-layered-elasticity-in-excel-pavement-analysis-to (iii) https://www.cesdb.com/ellea1.html Detailed information about the underlying formulation can be found in: (i) https://docs.lib.purdue.edu/cgi/viewcontent.cgi?article=2659&context=jtrp (ii) https://www.amazon.com/Pavement-Mechanics-Prof-Eyal-Levenberg/dp/8797231703