Journal of South China University of Technology (Natural Science Edition) ›› 2016, Vol. 44 ›› Issue (10): 8-14.doi: 10.3969/j.issn.1000-565X.2016.10.002

• Mechanical Engineering • Previous Articles     Next Articles

Experimental Investigation into Mechanical Properties of Copper Sheet with Size Effects

ZHANG Sai-jun GONG Xiao-long LI Jian-qiang ZHOU Chi YUAN Ning   

  1. School of Mechanical and Automotive Engineering//Guangdong Provincial Key Laboratory of Precision Equipment and Manufacturing Technology,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2015-12-11 Revised:2016-05-03 Online:2016-10-25 Published:2016-09-01
  • Contact: 张赛军(1978-)，男，副教授，主要从事先进材料成形工艺及理论研究． E-mail:mesjzhang@scut.edu.cn
  • About author:张赛军(1978-)，男，副教授，主要从事先进材料成形工艺及理论研究．
  • Supported by:
     Supported by the National Natural Science Foundation of China(51375172)

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Abstract:

The tensile samples of different grain sizes were obtained by heating 0. 1,0. 2,0. 4,0. 6,0. 8 and 1. 0mm T2 copper at 450,650 and 850 ℃.Then,the deformation of the samples in uniaxial tension tests was measured by the digital image correlation (DIC) method,and the relationships between the relevant parameters (namely,the yield strength,the tensile strength,the maximum uniform strain and the fracture strain) and the grain size as well as the sheet thickness are evaluated.Experimental results show that the mechanical properties of the annealed T2 copper sheet show an obvious size effect; specifically,the tensile strength,the maximum uniform strain and the fracture strain decrease with the decrease of the sheet thickness or the increase of the grain size,and they all have an approximate exponential relationship with the ratio of the sheet thickness to the grain size.

Key words: size effect, digital image correlation, mechanical properties, T2 copper sheet