if (runTime.outputTime())
    {
        volScalarField sigmaEq
        (
            IOobject
            (
                "sigmaEq",
                runTime.timeName(),
                stressMesh,
                IOobject::NO_READ,
                IOobject::AUTO_WRITE
            ),
            sqrt((3.0/2.0)*magSqr(dev(sigma)))
        );

        Info<< "Max sigmaEq = " << max(sigmaEq).value()
            << endl;

        runTime.write();
    }