Cycle counting in fatigueMaterial

[ankitprakashntpc]

Dear all,

Can anybody please guide me about the method of counting no. of equivalent complete cycles experienced by an element of material wrapped with fatigueMaterial (Uriz)?

Thanks and regards,
Ankit Prakash

[ankitprakashntpc]

Please reply, if anybody has any idea.

[ankitprakashntpc]

Hi all,

Let me post my query in another way. Is there any way by which I can record final damage indices (DI) of elements wrapped with fatigueMaterial? This variable I suppose is used in the source code of fatigueMaterial. Always appreciate your informative replies.

Thanks and regards,
Ankit Prakash
ankitprakashntpc@gmail.com

[kavir]

Hi
I model a chevron frame from nonlinear beam column elements and corotational geom system.its material is Steel02 with fatigue material.the frame is influence of cyclic load for plot hysteresis curve.but when fatigue failed occurs ,it not shown in hysteresis curve and immediately occurs Energy test converge error.
can you help me?

[kavir]

Hi
I model a chevron frame from nonlinear beam column elements and corotational geom system.its material is Steel02 with fatigue material.the frame is influence of cyclic load for plot hysteresis curve.but when fatigue failed occurs ,it not shown in hysteresis curve and immediately occurs Energy test converge error.
can you help me?

WARNING - ForceBeamColumn2d::update - failed to get compatible element forces &
deformations for element: 600(dW: << 1.13233e-011)
Domain::update - domain failed in update
DisplacementControl::update - model failed to update for new dU
WARNING NewtonRaphson::solveCurrentStep() -the Integrator failed in update()
StaticAnalysis::analyze() - the Algorithm failed at iteration: 0 with domain at
load factor 1.03456e+014
OpenSees > analyze failed, returned: -3 error flag
WARNING - ForceBeamColumn2d::update - failed to get compatible element forces &
deformations for element: 300(dW: << 1.92698e-011)
WARNING - ForceBeamColumn2d::update - failed to get compatible element forces &
deformations for element: 600(dW: << 1.13233e-011)
Domain::update - domain failed in update
DisplacementControl::update - model failed to update for new dU
WARNING NewtonRaphson::solveCurrentStep() -the Integrator failed in update()
StaticAnalysis::analyze() - the Algorithm failed at iteration: 0 with domain at
load factor -5.97999e+013
OpenSees > analyze failed, returned: -3 error flag