A composite post-processing

The Class “PostComposite” calculates composite failure indices and reserve factors for a specified failure criterion. The calculation is done with CLA classes using a loading using finite element “Shell Forces” and “Shell Moments” Results. Practically, one defines a loading as follows:

        ld=ClaLoad.new
        ld.Id="testLoad"
        ld.setMembrane([0.0,0.0,0.0],"femFM","femFM","femFM")
        ld.setFlexural([0.0,0.0,0.0],"femFM","femFM","femFM")
        ld.setOutOfPlane([0.0,0.0],"femFM","femFM")

        res=db.getResultCopy(lcName,scName,"Shell Forces",
                                    interpolation,grp,layers)
        res.modifyRefCoordSys(db,"lamCS")
        ld.setShellForces(res)

        res=db.getResultCopy(lcName,scName,"Shell Moments",
                                    interpolation,grp,layers)
        res.modifyRefCoordSys(db,"lamCS")
        ld.setShellMoments(res)

        criteria=[]
        criteria << ["composite_RF",criterion,"RF",false,false]
        criteria << ["composite_FI",criterion,"FI",false,false]
        outputs=db.calcFiniteElementResponse(@compDb,0.0,ld,[false,true,false],
            [],[],fos,criteria)

        rfRes=outputs["composite_RF"]
        fiRes=outputs["composite_FI"]

Note that the calculation uses a composite database stored in “@compDb” member data. This ClaDb object must have been defined before. The class also records envelopes of failure indices in “@minMosResults” member data.

Note that there is a limitation to the post-processing: the thermo-elastic part of the laminate loading is not considered in this example. Therefore, the results might be inexact for thermo-elastic load cases (orbit load cases for example). The class is defined in file
“POST/post_Composite.rb”.

X.F.2.2 A composite post-processing