Does anyone know what to do when “Plasticity algorithm did not converge for element xxx” appears?

- February 3, 2021 at 1:14 pm
  
  jbraido
  Subscriber
  
  Hi everybody,I'm modeling a T concrete beam to define crack regions. In Ansys, I modeled only half beam and forces were applied as a 4 point bending test.nBoundary conditions avoid displacements in vertical, longitudinal and transversal directions.nI'm using SOLID65 and REINF265.nAnsys closes during analysis and the message Plasticity algorithm did not converge for element xxx appears.nI'll appreciate it if someone could give me more information about it.n
- February 8, 2021 at 1:07 pm
  
  Ashish Khemka
  Ansys Employee
  
  nnThis message is displayed when Ansys is not able to converge plastic deformation increment. This generally occurs when the load is rapidly applied. I would suggest you to apply load more slowly by increasing number of substeps using NSUBST command. // Command Reference // XV. N Commands // NSUBST.nnRegards,nAshish Khemkan
- February 10, 2021 at 12:42 am
  
  jbraido
  Subscriber
  
  @akhemka thank you for your answer! Really helped me!n
- February 10, 2021 at 8:15 am
  
  Erik Kostson
  Ansys Employee
  
  Solid65 are old legacy elements that can be mesh sensitive giving inaccurate results.nnWe recommend using solid186 and reinf elements for reinforced concrete.nThey are also very well behaved and converge well even past concrete failure.nnAll the bestnnErikn

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