Issue |
MATEC Web of Conferences
Volume 21, 2015
4th International Conference on New Forming Technology (ICNFT 2015)
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Article Number | 07009 | |
Number of page(s) | 7 | |
Section | Materials and Characterisations | |
DOI | https://doi.org/10.1051/matecconf/20152107009 | |
Published online | 10 August 2015 |
Compression deformation behaviors of sheet metals at various clearances and side forces
1 College of Materials Science and Engineering, Northwestern Polytechnical University, 127 Youyi Xilu, Xi'an, Shaanxi 710072, China
2 Department of Mechanical Engineering, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA
a Corresponding author: e-mail: zhanmei@nwpu.edu.cn
Modeling sheet metal forming operations requires understanding of plastic behaviors of sheet metals along non-proportional strain paths. The plastic behavior under reversed uniaxial loading is of particular interest because of its simplicity of interpretation and its application to material elements drawn over a die radius and underwent repeated bending. However, the attainable strain is limited by failures, such as buckling and in-plane deformation, dependent on clearances and side forces. In this study, a finite element (FE) model was established for the compression process of sheet specimens, to probe the deformation behavior. The results show that: With the decrease of the clearance from a very large value to a very small value, four defects modes, including plastic t-buckling, micro-bending, w-buckling, and in-plane compression deformation will occur. With the increase of the side force from a very small value to a very large value, plastic t-buckling, w-buckling, uniform deformation, and in-plane compression will occur. The difference in deformation behaviors under these two parameters indicates that the successful compression process without failures for sheet specimens only can be carried out under a reasonable side force.
© Owned by the authors, published by EDP Sciences, 2015
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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