Reply To: Extract Bolt Pretension Working Load with ANSYS APDL

[Norbert Ionas]

total_nodes=0

ESEL,S,ENAME,,179                       !select all pretension elements PRETS179
CM,bp_comp,ELEM                         !creates a component for the bolt pretension elements
NSLE,S,POS,3                            !show/select head nodes for the pretension elements
CM,bphn_comp,NODE                       !creates a component for the bolt pretension head nodes
*GET,nr_nodes,NODE,0,COUNT              !getting the number of head nodes

total_nodes=nr_nodes

*GET,NR_STEPS,ACTIVE,0,SET,NSET                 !get total number of time steps
*DIM,nids,ARRAY,nr_nodes,7                      !array to store the forces
*DIM,bolt_force,ARRAY,NR_STEPS,nr_nodes+1       !array to store bolt forces

*IF,total_nodes,GE,1,THEN                !if at least one bolt pretension exist in the model
    *DO,i,1,NR_STEPS
        SET,,,,,,,i
        *GET,time,ACTIVE,0,SET,TIME
        bolt_force(i,1)=time
        
        *DO,q,1,nr_nodes
            column = q+1
            *GET,nodes,NODE,0,NUM,MIN               !get minimum node number
            *GET,nx,NODE,nodes,LOC,X                !gets x coordinate of the node
            *GET,ny,NODE,nodes,LOC,Y                !gets y coordinate of the node
            *GET,nz,NODE,nodes,LOC,Z                !gets z coordinate of the node
            
            NSEL,S,NODE,,nodes                      !select the identified head node
            
            my_force = 0
            *GET,my_force,NODE,nodes,RF,FX          !gets the bolt force
            bolt_force(i,column)=my_force

            CM,pproc_node,NODE                      !creates component for the post processed head nodes
            ESLN                                    !selects the pretnesion elements which are connected to the head node
            CM,pproc_sec,ELEM                       !creates component for the post processed pretension elements
            my_elem=ELNEXT(0)                       !select the first element from the list
            *GET,bpe_type,ELEM,my_elem,ATTR,TYPE    !get element type of the selected pretention element 

            NSLE
            ESLN
            my_elem=ELNEXT(0)                       !select the first element from the list
            !*GET,be_type,ELEM,my_elem,ATTR,TYPE     !get element type of the selected bolt element (issue with this approac when the bolt have two type of elements tetras and hex as they have different element id) 
            *GET,mat_id,ELEM,my_elem,ATTR,MAT       !get material id of the selected solid bolt element
        
            nids(q,1)=q
            nids(q,2)=nodes
            nids(q,3)=mat_id
            nids(q,4)=bpe_type
            nids(q,5)=nx
            nids(q,6)=ny
            nids(q,7)=nz
        
            !unselect processed elements and nodes
            CMSEL,S,bp_comp
            CMSEL,U,pproc_sec
            CM,bp_comp,ELEM
            CMSEL,S,bphn_comp
            CMSEL,U,pproc_node
            CM,bphn_comp,NODE
            *GET,rem_nr_nodes,NODE,0,COUNT
            !/com, **rem_nr_nodes: %rem_nr_nodes%
            CMSEL,S,bphn_comp
            *ENDDO
        ALLSEL
        ESEL,S,ENAME,,179                       !select all pretension elements PRETS179
        CM,bp_comp,ELEM                         !creates a component for the bolt pretension elements
        NSLE,S,POS,3                            !show/select head nodes for the pretension elements
        CM,bphn_comp,NODE  
    *ENDDO
*ENDIF