5. Conclusion

The hexahedral element with 8 nodes underintegrated at an integration point and stabilized by the ASM method gives correct results on problems where HEXA8standard blocks (bending, shear), as shown in test case SSNV196. In addition, it gives significant savings in calculation time.

However, it has a disadvantage in statics (the same as the stabilized analog QUAD4sous -integrated 2D element): when the elements are not parallelepipedic, the results are affected, or even false if the elements have angles far from 90°. The recommended solution is then to use HEXA8standard (with 8 Gauss points) on these meshes. In explicit dynamics, on the other hand, this disadvantage does not exist. But the current implementation only concerns statics.