E5076

The bisection limit specified in the NLPARM (static solutions) or a TSTEPNL (transient solutions) Bulk Data entry for the current load increment has been reached.

• Increase the number of increments or time steps. If the model is experiencing excessive loads, large deformations, significant contact sliding, large changes in stiffness due to material non-linearity, decreasing the incremental applied load via increased increments or time steps can help.
• If contact is in the model, try decreasing the contact stiffness scale factor, possible values to try are 0.1 or 0.01.
• The structure may be buckling or have an instability. For diagnostic purposes only (this can affect accuracy of results) consider using the parameters NLKDIAGAFACT or CONTACTSTAB (if contact is present) to see if the analysis progresses further and if so, the results past the point of failures might indicate if the structure is buckling or indicate where instabilities are occurring.
• Try increase the Maximum iterations for an increment in the Advanced nonlinear settings.

The analysis reduced the time step or load increment in an attempt to converge, but the limit for the number of reductions or bisections was reached.

• At the time of the error, confirm the model is stable and can handle the load. For example:
  • If the parts have a gap at time 0 and use separation contact, re-position the parts to remove the gap. A nonlinear static analysis may not be able to close the gap if the force needed to move the part is 0.
  • If the load is a force or pressure and the model is buckling or has a "snap through" condition, the required load may be smaller than the increasing load that is applied. Change the load type to an enforced motion.
  • Alternatively for structures that may be buckling or have an instability, use the parameters NLKDIAGAFACT or CONTACTSTAB (if contact is present) to see if the analysis progresses further. (This is for diagnostic purposes only since these parameters can affect the accuracy of results.) If the analysis proceeds farther, the results past the point of failures might indicate if the structure is buckling or indicate where instabilities are occurring.
• Increase the number of increments or time steps under "Nonlinear Setup". If the model is experiencing excessive loads, large deformations, significant contact sliding, or large changes in stiffness due to material non-linearity, decreasing the incremental applied load via increased increments or time steps can help.
• If contact is in the model, try decreasing the contact stiffness scale factor by 0.1 or 0.01.
• Increase the "Maximum bisections for each increment" in the "Nonlinear Setup -> Advanced Settings".
• If the analysis converges on Displacement and Work but fails to converge on Load, disable the requirement to converge on Load. "Nonlinear Setup -> Advanced Settings" and check the boxes for convergence criteria of Displacement and Work.