Experimental Procedures and Results for Benchmark 3: Stage 2 Forming Process

Published

October 16, 2008

Author(s)

Mark Iadicola, Timothy J. Foecke, T B. Stoughton

Abstract

The Numisheet 2005 Benchmark #3 consists of a two stage forming process performed on four materials (three steels and one aluminum). Stage 1 consists of forming channel sections in a channel draw die with variable penetration draw beads, and is described in detail in another report. In Stage 2, described here, the samples from Stage 1 are trimmed and subjected to near plane strain Marciniak style cup test. The plane straining is performed in 0 ^o and 90 ^o orientations. After failure limits for the cup depths are determined, trimmed samples from Stage 1 are strained to specific cup depths (less than the depth of failure) andstresses are measured in situ using a unique X-ray diffraction technique. The results are repeatable and consistent with expectations. The goal of this benchmark is to check not only the strain achieved during a two stage forming process, but also to develop data that include the stresses achieved. These results may then be used to further test the ability of numerical models to predict not only strains but stressesduring a forming process.

Proceedings Title

NUMISHEET 2005 Proceedings Of The International Conference and Workshop On Numerical Simulation of 3D Sheet Forming Processes | 6th | | American Institute of Physics

Conference Dates

August 15-19, 2005

Conference Location

Undefined

Conference Title

NUMISHEET Conference

Pub Type

Conferences

Keywords

formability, Marciniak, stress measurement, X-ray diffraction

Citation

Iadicola, M. , Foecke, T. and Stoughton, T. (2008), Experimental Procedures and Results for Benchmark 3: Stage 2 Forming Process, NUMISHEET 2005 Proceedings Of The International Conference and Workshop On Numerical Simulation of 3D Sheet Forming Processes | 6th | | American Institute of Physics, Undefined (Accessed January 15, 2025)