if (runTime.outputTime())
  {
    volScalarField epsilonEq
      (
       IOobject
       (
	"epsilonEq",
	runTime.timeName(),
	mesh,
	IOobject::NO_READ,
	IOobject::AUTO_WRITE
	),
       sqrt((2.0/3.0)*magSqr(dev(epsilon)))
       );

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

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

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

    //- boundary traction
    // volVectorField traction
    //   (
    //    IOobject
    //    (
    // 	"traction",
    // 	runTime.timeName(),
    // 	mesh,
    // 	IOobject::NO_READ,
    // 	IOobject::AUTO_WRITE
    // 	),
    //    mesh,
    //    dimensionedVector("zero", dimForce/dimArea, vector::zero)
    //    );
    // forAll(traction.boundaryField(), patchi)
    //   {
    // 	traction.boundaryField()[patchi] =
    // 	  n.boundaryField()[patchi] & sigma.boundaryField()[patchi];
    //   }

    // contact fields
    // if(contactBoundaries)
    //   {
    // 	volScalarField stickSlipFaces
    // 	  (
    // 	   IOobject
    // 	   (
    // 	    "stickSlipFaces",
    // 	    runTime.timeName(),
    // 	    mesh,
    // 	    IOobject::NO_READ,
    // 	    IOobject::AUTO_WRITE
    // 	    ),
    // 	   mesh,
    // 	   dimensionedScalar("zero", dimless, 0.0)
    // 	   );
    // 	forAll(stickSlipFaces.boundaryField(), patchi)
    // 	  {
    // 	    if(U.boundaryField()[patchi].type()
    // 	       ==
    // 	       solidContactFvPatchVectorField::typeName)
    // 	      {
    // 		const solidContactFvPatchVectorField& Upatch =
    // 		  refCast<const solidContactFvPatchVectorField>
    // 		  (U.boundaryField()[patchi]);

    // 		if(!Upatch.master())
    // 		  {
    // 		    stickSlipFaces.boundaryField()[patchi] =
    // 		      Upatch.frictionContactModelPtr()->stickSlipFaces();
    // 		  }
    // 	      }
    // 	  }
    // 	stickSlipFaces.write();
    //   }


    //- boundary forces
//     Info << nl;
//     forAll(mesh.boundary(), patchi)
//       {
// 	Info << "Patch " << mesh.boundary()[patchi].name() << endl;
// 	vectorField totalForce = mesh.Sf().boundaryField()[patchi] & sigma.boundaryField()[patchi];

// 	vector force = sum( totalForce );
// 	Info << "\ttotal force is " << force << " N" << endl;

// 	const vectorField& nb = n.boundaryField()[patchi];
// 	scalar normalForce = sum( nb & totalForce );
// 	Info << "\tnormal force is " << normalForce << " N" << endl;
// 	scalar shearForce = mag(sum( (I - sqr(nb)) & totalForce ));
// 	Info << "\tshear force is " << shearForce << " N" << endl;
// 	}

    runTime.write();
  }