Numerical Acceptance Criteria
Numerous control parameters are associated with the convergence and integration accuracy algorithms in Abaqus standard. These parameters are assigned default values that are chosen to optimize the accuracy and efficiency of the solution for a wide spectrum of nonlinear problems. The user can change the solution control parameters, as described in the following chapter, to help the convergence solution or optimize the accuracy versus computational time. As these parameters are only defined for solver purposes, the user needs to get some knowledge about what can be mainly set with these parameters to obtain a proper converged solution. Parameters which also need to be modified properly in accordance with the physics of the FEA model in order to ensure a realistic results. A summary of essential considerations regarding these criteria come from the definitions and recommendations written in Abaqus documents.