Numerical Modeling of Ductile Fracture Behavior in Aluminum Weldments

摘要

The present investigation focuses on the application of micro-mechanical material modeling by means of the modified Gurson model to determine the deformation and fracture behavior of aluminum weldments. In order to predict the material behavior, a set of material parameters associated with formation and coalescence of voids was established for the different zones in a weld. The material parameters of various positions in the heat-affected zones were determined for two different aluminum alloys, one 6005 alloy and one 6082 alloy, using weld thermal simulated material. The results from numerical simulations of welded wide plates showed that the deformation and fracture characteristics can be predicted fairly well by using the established damage mechanics methodology.