Size effects on springback behaviors due to plastic strain gradient hardening in microbending process of pure aluminum foils

Li H, Dong X, Shen Y, Diehl A, Hagenah H, Engel U, Merklein M (2010)

Publication Type: Journal article

Publication year: 2010

Journal

Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing Elsevier

Publisher: None

Book Volume: 257

Pages Range: 4497-4504

Journal Issue: 16-17

DOI: 10.1016/j.msea.2010.03.105

Abstract

In order to investigate the springback behavior of pure aluminum foils, scaled microbending experiments with different thicknesses ranging from 25μm to 500μm were carried out. In the experiments, it is observed that springback angle increases with decreasing foil thickness, which indicates obvious presence of size effects, and is attributed to plastic strain gradient hardening. So a constitutive model, taking into accounts both plastic strain and plastic strain gradient hardening, is proposed to analyze the microbending process of thin foils. The model is based on the relationship between yield stress and dislocation density, and is adopted to predict the springback angle after microbending both by analytical expressions and by FE simulation. It is confirmed that the predictions by using the proposed hardening model agree well with the experimental data, while those by using conventional elastoplastic model cannot capture such size effects. © 2010.

Authors with CRIS profile

Hinnerk Hagenah Institute of Manufacturing Technology Ulf Engel Institute of Manufacturing Technology Marion Merklein Institute of Manufacturing Technology

Involved external institutions

Shanghai Jiao Tong University / 上海交通大学

China (CN)

How to cite

APA:

Li, H., Dong, X., Shen, Y., Diehl, A., Hagenah, H., Engel, U., & Merklein, M. (2010). Size effects on springback behaviors due to plastic strain gradient hardening in microbending process of pure aluminum foils. Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 257(16-17), 4497-4504. https://dx.doi.org/10.1016/j.msea.2010.03.105

MLA:

Li, Hezong, et al. "Size effects on springback behaviors due to plastic strain gradient hardening in microbending process of pure aluminum foils." Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 257.16-17 (2010): 4497-4504.

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