How can the Cyclic and repeated loading be represented in the nonlinear finite element program(ANSYS software)?
I can help if you are using ansys apdl . if so please provide more info about your loading and how you want it to be repeated and will be better if you provide a descroption algorithm
I can help if you are using ansys apdl . if so please provide more info about your loading and how you want it to be repeated and will be better if you provide a descroption algorithm
I'm very grateful to you Bendine Kouider, I'm very sorry some misunderstanding occurred. I am using the Graphical environment (ANSYS APDL).the load is to be applied as shown in fig. the max. force depends on the test of the control specimen under static loading.
Dear Qasim M. Shakir i attached this code to you i did it based on the schema you provide, all the steps are listed with comments. And for sure Claudio Pedrazzi is welcom to make corrections and suggestions
Nodenumber = ! Node number where the force is applied
Force = ! Applied Force Value
counter = ! start counting
cycl = ! Total number of cycles
Time = ! Total Time
Tstep = Time/cycl ! Time increment
deltaF =
/SOLU
ANTYPE,TRANS
TRNOPT,FULL,,DAMP
KBC,0 ! Ramped load step
AUTOTS,ON ! Automatic Time Stepping activated
DELTIM,0.1*Tstep,0.01*Tstep,Tstep,ON ! Specifies the time step sizes; DELTIM, DTIME, DTMIN, DTMAX, Carry
*DO,t,TIncr,TimeTot,TIncr
counter=counter+1
*IF,counter,EQ,(2*counter-1),THEN
F,Nodenumber,FZ,Force ! Apply the force in the suitable direction(Fx for x direction,FY for x
*ELSE !direction,FZ for Z direction
F,FRC,FY,Force+deltaF(counter)
*EndiF
TIME,t
SOLVE
*ENDDO
Finish
The cyclic loading in ANSYS can be applied using APDL. At different time moment, corresponding load is applied to structure and solved. Then, the results of the whole time range is the cyclic loading results.
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