Calibration of Failure Criteria for Additively Manufactured Metallic Materials

A new version of failure criterion for additively manufactured materials, together with simple and accurate calibration procedures, is proposed and experimentally verified in this paper. The proposition is based on void growth-based ductile failure models. The failure criterion for ductile materials proposed by Hancock-Mackenzie was calibrated using simple methods and accessories. The calibration procedure allows the determination of failure strain under pure shear. The method is accurate and simple due to the fact that it prevents strain localization disturbing stress distribution at the failure zone. The original criterion was modified to better suit the deformation behavior of additively manufactured materials. Examples of calibration of the original and modified failure criteria for additively manufactured 316L alloy steel is also given in this paper, along with analyses of the obtained results.

Automated summary

A new failure criterion for additively manufactured materials, based on void growth-based ductile failure models, is proposed in this paper. The calibration procedure for the ductile failure criterion is simple and accurate, preventing strain localization from disturbing stress distribution at the failure zone. The original criterion was modified to better fit the deformation behavior of additively manufactured materials, and examples of calibration and analysis for 316L alloy steel are provided.