Exercise 1 Given structure: 2D steel truss beam Geometry and loads:according to the sketch Supports:according to the sketch Cross section area:20 cm2 Material properties:E = 2.1106 daN/cm2 = 0.3 Force value:F = 1000 daN Element type:LINK1 Requirements: - Deformed shape - List of nodal displacements - List of reaction forces - Axial stress diagrams along the trusses Remark: truss elements withstand only axial force (stress); no shear or bending effects are present. Preprocessing text file /PREP7 ! ET,1,LINK1 R,1,20 MP,EX,1,2.1E6 MP,NUXY,1,0.3 ! N,1,0,0 N,5,400,0 FILL,1,5 N,6,100,100 N,7,200,100 N,8,300,100 ! E,1,2 EGEN,4,1,1 E,6,7 E,7,8 E,1,6 E,2,6 E,3,6 E,3,7 E,3,8 E,4,8 E,5,8 ! D,1,ALL,0 D,2,UY,0 ! F,6,FY,-1000 F,7,FY,-1000 F,8,FY,-1000 ! SAVE FINISH New Postprocessing commands Assigning an element table for storing data (results) out of the results database file (file.rst): ETAB, lab, item, comp lab - user defined name for the desired result item- compulsory label for the item saved in the element table comp- compulsory location of the desired result in the element table Forthecompulsorylabelsitemandcomp,checktheoutputdatachapterforeachelement type usedin themesh. AtablewithavailableETABasignementsisalwaysthere.For thepeculiar case of element LINK1, the result axial stress is foiund at item = LS and comp = 1. Plotingthediagramofthepreviouslydefindelementtablealongtheline-typeelement(trussor beam): PLLS,labi, labj Both i and j labels shall be used (for LINK1, the axial stress is constant along the element, thus the same label will be used twice). Printing the previously defined element table components: PRET,labi, labj, labk, ... Commands sequence for postprocessing (to be typed in the GUI* command line): /POST1 PLDI,2 PRNS,U,COMP PRRS,F ETAB,AXS,LS,1 PLLS,AXS,AXS PRET,AXS * Graphical User Interface