Material Intrinsic Length in Plastic Strain Gradient Theory and Microbending Process of Metal Foils
Li Hezong , Dong Xianghuai , Huang Suxia , Diehl A, Hagenah H (2012)
Publication Type: Journal article
Publication year: 2012
Journal
Publisher: None
Book Volume: 403-408
Pages Range: 685-690
ISBN: 9783037853122
DOI: 10.4028/www.scientific.net/AMR.403-408.685
Abstract
In microbending experiments of metal foils an increase of non-dimensional bending moment with decreasing foil thickness has been observed, which indicates the obvious presence of size effects. It is attributed to plastic strain gradient. So a constitutive model taking into account plastic strain gradient together with conventional plastic strain hardening is proposed to analyze the non-dimensional bending moment in microbending process. It is confirmed that the predictions by using the proposed hardening model agree well with the experimental data, while those determined by using conventional elastoplastic model cannot capture such size effects. A semi-empirical expression is reasonable to determine the material intrinsic length as a function of shear modulus, initial yield strength, length of Burger's vector, grain size, and macro geometrical characteristic scale of the specimen. © (2012) Trans Tech Publications, Switzerland.
Authors with CRIS profile
Additional Organisation(s)
Involved external institutions
China (CN)How to cite
APA:
Li Hezong, ., Dong Xianghuai, ., Huang Suxia, ., Diehl, A., & Hagenah, H. (2012). Material Intrinsic Length in Plastic Strain Gradient Theory and Microbending Process of Metal Foils. Advanced Materials Research, 403-408, 685-690. https://doi.org/10.4028/www.scientific.net/AMR.403-408.685
MLA:
Li Hezong, , et al. "Material Intrinsic Length in Plastic Strain Gradient Theory and Microbending Process of Metal Foils." Advanced Materials Research 403-408 (2012): 685-690.
BibTeX: Download