Products: ABAQUS/Standard ABAQUS/CAE
Benefits: Adaptive remeshing can improve the quality of your ABAQUS/Standard simulation results when you are unsure how refined a mesh needs to be to reach a particular level of accuracy. Adaptive remeshing can also help you create a refined mesh in a specified region, such as near a stress riser or in a region of plastic deformation.
Description: Adaptive remeshing is available only for ABAQUS/Standard analyses submitted from ABAQUS/CAE. The goal of adaptive remeshing is to obtain a solution that satisfies discretization error indicator targets that you set, while minimizing the number of elements and, hence, the cost of your analysis. You can use adaptive remeshing to obtain a mesh that provides a balance between solution cost and desired accuracy. Figure 6–1 illustrates a case where adaptive remeshing improves the quality of the stress result around a fillet with targeted mesh refinement.
Note: Adaptive remeshing is one of three available adaptivity techniques in ABAQUS, complementing the Arbitrary Lagrangian Eulerian (ALE) adaptive meshing technique, used to smooth meshes, and mesh-to-mesh solution mapping, used to transfer solution variables following mesh replacement. To better distinguish adaptive remeshing in the Mesh module from ALE adaptive meshing in the Step module, the menus and the dialog boxes that allow you to configure ALE adaptive meshing now include the term ALE. Similarly, the term ALE Adaptive Mesh Constraints is now used in the Model Tree.
Adaptive remeshing involves the close interaction of ABAQUS/CAE and ABAQUS/Standard. ABAQUS/CAE submits a series of jobs, and ABAQUS/Standard communicates error indicator results corresponding to the mesh for each job. Figure 6–2 shows the roles of the user, ABAQUS/CAE, and ABAQUS/Standard in adaptive remeshing.
Figure 6–3 shows a typical notched specimen subjected to a stress riser. Adaptive remeshing refines the mesh in the region of peak stress gradients.
Figure 6–4 shows how the new mesh improves the accuracy of the analysis. You can use adaptive remeshing to strike a balance between analysis error and computation cost.
Mesh module: AdaptivityRemeshing Rule
