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Title: Forming Analysis of AZ31 Magnesium Alloy Sheets by Means of a Multistep Inverse Approach

Abstract

This paper applies a multi-step inverse approach to predict the forming of AZ31 magnesium alloy sheets. An in-house finite element code named “INAPH”, which implements the inverse approach formulation by Guo et al. (Int. J. Numer. Methods Eng., 30, 1385-1401), has been used for the forming analysis. This inverse approach uses the deformation theory of plasticity and assumes that the deformation is independent of the loading history. Failure during forming is predicted by a stress-based criterion or a forming limit diagram-based criterion. The INAPH predictions have been compared with experimental results of Takuda et al (Journal of Materials Processing Technology, 89-90:135-140) and incremental analysis using ABAQUS. The multi-step inverse analysis has been shown to very quickly and fairly accurately predict stress, plastic strain, thickness distributions and failure locations on deeply drawn parts made of AZ31 magnesium alloy. The capability of INAPH to predict the formability of magnesium alloys has also been demonstrated at various temperatures. As magnesium alloys possess very limited formability at room temperature, and their formability becomes better at higher temperatures (> 100oC), the inverse analysis constitutes an efficient and valuable tool to predict forming of magnesium alloy parts as a function of temperature. In addition, other processingmore » and design parameters such as the initial dimensions, final desired shape, blank holder forces, and friction can be quickly adjusted to assess the forming feasibility.« less

Authors:
;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
949887
Report Number(s):
PNNL-SA-56340
TRN: US200909%%524
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Materials & Design, 30(4):992-999
Additional Journal Information:
Journal Volume: 30; Journal Issue: 4
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; DEFORMATION; DESIGN; DIMENSIONS; FRICTION; MAGNESIUM ALLOYS; PLASTICITY; PLASTICS; PROCESSING; SHAPE; THICKNESS; Inverse Analysis, Sheet Metal Forming, Magnesium Alloys, Deformation Theory of Plasticity, Formability, Failure

Citation Formats

Nguyen, Ba Nghiep, and Bapanapalli, Satish K. Forming Analysis of AZ31 Magnesium Alloy Sheets by Means of a Multistep Inverse Approach. United States: N. p., 2009. Web. doi:10.1016/j.matdes.2008.06.052.
Nguyen, Ba Nghiep, & Bapanapalli, Satish K. Forming Analysis of AZ31 Magnesium Alloy Sheets by Means of a Multistep Inverse Approach. United States. https://doi.org/10.1016/j.matdes.2008.06.052
Nguyen, Ba Nghiep, and Bapanapalli, Satish K. 2009. "Forming Analysis of AZ31 Magnesium Alloy Sheets by Means of a Multistep Inverse Approach". United States. https://doi.org/10.1016/j.matdes.2008.06.052.
@article{osti_949887,
title = {Forming Analysis of AZ31 Magnesium Alloy Sheets by Means of a Multistep Inverse Approach},
author = {Nguyen, Ba Nghiep and Bapanapalli, Satish K},
abstractNote = {This paper applies a multi-step inverse approach to predict the forming of AZ31 magnesium alloy sheets. An in-house finite element code named “INAPH”, which implements the inverse approach formulation by Guo et al. (Int. J. Numer. Methods Eng., 30, 1385-1401), has been used for the forming analysis. This inverse approach uses the deformation theory of plasticity and assumes that the deformation is independent of the loading history. Failure during forming is predicted by a stress-based criterion or a forming limit diagram-based criterion. The INAPH predictions have been compared with experimental results of Takuda et al (Journal of Materials Processing Technology, 89-90:135-140) and incremental analysis using ABAQUS. The multi-step inverse analysis has been shown to very quickly and fairly accurately predict stress, plastic strain, thickness distributions and failure locations on deeply drawn parts made of AZ31 magnesium alloy. The capability of INAPH to predict the formability of magnesium alloys has also been demonstrated at various temperatures. As magnesium alloys possess very limited formability at room temperature, and their formability becomes better at higher temperatures (> 100oC), the inverse analysis constitutes an efficient and valuable tool to predict forming of magnesium alloy parts as a function of temperature. In addition, other processing and design parameters such as the initial dimensions, final desired shape, blank holder forces, and friction can be quickly adjusted to assess the forming feasibility.},
doi = {10.1016/j.matdes.2008.06.052},
url = {https://www.osti.gov/biblio/949887}, journal = {Materials & Design, 30(4):992-999},
number = 4,
volume = 30,
place = {United States},
year = {Wed Apr 01 00:00:00 EDT 2009},
month = {Wed Apr 01 00:00:00 EDT 2009}
}