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Before going through this step, make sure you have gone go through the first four five steps of the

https://confluence.cornell.edu/display/SIMULATION/redAnTS+TUTORIAL+1+Problem+Specification

Introduction

MATLAB assigns a handle to every graphics object it creates. One can use this handle to change the object's properties. redAnTS creates a structure, called the "handles structure", that contains all the handles of the objects in its graphical user interface (GUI). It then augments this "handles structure" by adding fields corresponding to the mesh, material properties, nodal displacements, element strains, etc. In other words, the handles structure is the container that is used to store this FEA data. The handles structure is illustrated in the figure below.

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Now we need to drive redAnTS into CalcStrainStress.m function so that it will stop execution at the breakpoint that we just set. CalcStrainStress.m is invoked when we calculate σ_xxthe stress components in the redAnTS GUI as per the first item in Step 5 of the tutorial. Before we dive into this step with full gusto, note that the Post-Processing field under our trusty pal Current Settings is empty. This signifies that the program is yet to calculate stress and strain from the nodal displacements. To calculate the stress and strain components, go to the redAnTS GUI and click on Strain, Stress under Post-Process. Voila, the program reports Stress/Strain done in Current Settings. Program execution should stop at the above statement. Check the Workspace. Then, step through this statement using the step icon.

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