The problem considered here demonstrates the ability to change the material definition and continue the analysis after import. An elastic-plastic material with Mises yield criterion is used in the ABAQUS/Standard analysis. The analysis is continued in ABAQUS/Explicit by introducing a ductile failure model using the *SHEAR FAILURE option. The square cross-section of a prismatic bar under transverse biaxial tensile loading is modeled using CPE4R elements. Due to symmetry of the geometry and the loading, only one-quarter of the domain is modeled, as shown in Figure 3.12.8–1.

In the ABAQUS/Standard analysis the object is loaded so that part of the domain begins to yield. The loading is continued in the ABAQUS/Explicit analysis so that the plastic strains reach into the failure regime. The results of the ABAQUS/Explicit analysis are imported back into ABAQUS/Standard to verify that the failed elements are not imported. The material properties used in ABAQUS/Standard are as follows:

In ABAQUS/Explicit ductile failure is specified so that the failure starts when the equivalent plastic strain reaches 0.8 and the complete failure is reached when the equivalent plastic strain reaches a value of unity. The load is specified in ABAQUS/Standard so that the maximum traction, , is 2.5 times the initial yield stress; and in ABAQUS/Explicit it is increased to a value of 4 times the initial yield stress. The UPDATE=NO and STATE=YES parameters are used on the *IMPORT option.