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Evaluate stress for dynamic structural analysis problem



nodalStress = evaluateStress(structuralresults) evaluates stress at nodal locations for all time- or frequency-steps.


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Evaluate the stress in a beam under a harmonic excitation.

Create a transient dynamic model for a 3-D problem.

structuralmodel = createpde("structural","transient-solid");

Create the geometry and include it in the model. Plot the geometry.

gm = multicuboid(0.06,0.005,0.01);
structuralmodel.Geometry = gm;

Figure contains an axes object. The axes object contains 6 objects of type quiver, text, patch, line.

Specify Young's modulus, Poisson's ratio, and the mass density of the material.

structuralProperties(structuralmodel,"YoungsModulus",210E9, ...
                                     "PoissonsRatio",0.3, ...

Fix one end of the beam.


Apply a sinusoidal displacement along the y-direction on the end opposite the fixed end of the beam.

structuralBC(structuralmodel,"Face",3, ...
                             "YDisplacement",1E-4, ...

Generate a mesh.


Specify the zero initial displacement and velocity.


Solve the model.

tlist = 0:0.002:0.2;
structuralresults = solve(structuralmodel,tlist);

Evaluate stress in the beam.

stress = evaluateStress(structuralresults);

Plot the normal stress along x-direction for the last time-step.

title("x-Direction Normal Stress in the Beam of the Last Time-Step")

Input Arguments

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Solution of a dynamic structural analysis problem, specified as a TransientStructuralResults or FrequencyStructuralResults object. Create structuralresults by using the solve function.

Example: structuralresults = solve(structuralmodel,tlist)

Output Arguments

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Stress at the nodes, returned as an FEStruct object with the properties representing the components of a stress tensor at nodal locations. Properties of an FEStruct object are read-only.

Version History

Introduced in R2018a