DocumentCode :
3017085
Title :
Research on the Micro-tensile Test on H62 Brass Sheet and Size Effects
Author :
Ziyun, Wei ; Fang, Liu
Author_Institution :
Coll. of Mech. Eng., Univ. of Shanghai for Sci. & Technol., Shanghai, China
fYear :
2010
fDate :
25-27 June 2010
Firstpage :
5542
Lastpage :
5545
Abstract :
In order to investigate the effect of grain size and thickness with respect to material mechanical property in the micro-scale, experiments were taken by tensile test on H62 brass sheet metal with different grain sizes and thicknesses. The experiment results show that the flow stress decreases with the decreasing sheet metal thickness, and the flow stress decreases as grain size increases. It also shows that the hardening exponent of sheet metal increases as sheet thickness and sheet grain sizes increasing respectively. A parameter φ = t/d (the ratio of sheet thickness to material grain size) was introduced to characterize size effects, then, a new constitutive model, which consider the factor φ, was developed by combining the surface layer theory and the Swift model. A good coincidence was obtained between the proposed model and experimental results. This investigation can provides some support for theoretical and experimental study of micro-forming.
Keywords :
brass; tensile strength; tensile testing; H62 brass sheet; Swift model; flow stress; grain thickness; mechanical property; microtensile test; sheet grain sizes; sheet metal thickness; sheet thickness; size effects; surface layer theory; Finite element methods; Grain size; Materials processing; Mechanical engineering; Metals; Stress; constitutive model; hardening exponent; micro-tensile test; size effects;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electrical and Control Engineering (ICECE), 2010 International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-6880-5
Type :
conf
DOI :
10.1109/iCECE.2010.1431
Filename :
5631783
Link To Document :
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