全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

冲击剪切载荷下SiCP/6151Al复合材料变形局部化及增强颗粒尺寸效应

, PP. 51-55

Keywords: 冲击,金属基复合材料,变形局部化,尺寸效应

Full-Text   Cite this paper   Add to My Lib

Abstract:

利用特殊设计的"hatshape"试样,在分离式Hopkinson压杆和MTS通用材料试验机上实验研究了颗粒尺寸和应变率对颗粒增强金属基复合材料(SiCP/6151Al)变形局部化行为的影响。结果表明:颗粒尺寸对复合材料的变形强化与变形局部化行为有显著影响。具体表现为:颗粒越小,复合材料流动应力越高,即强化效果越好;另一方面,对受载试样的微观检测发现,颗粒越小,复合材料剪切变形局部化越明显。同时发现,冲击载荷(高应变率)下复合材料更容易发生变形局部化。

References

[1]  吴人洁.金属基复合材料的现状与展望[J].金属学报,1997,33(1):78-84.
[2]  Clyne T W, Withers P J. An Introduction to Metal Matrix Composites[M]. U K: Cambridge University Press, 1993.1-10.
[3]  Zener C, Hollomon J H. Effect of strain rate upon plastic flow of steel[J]. JApplPhys, 1944, 15(1):22-27.
[4]  Rogers H C. Adiabatic shear deformation[J]. IntRevMatSci, 1979, 9(1):283-311.
[5]  Bai Y L. Thermo-plastic instability in simple shear[J]. Journal of Mechanics and Physics of Solids, 1982, 30(1):195-207.
[6]  Meyers M A. Dynamic Behaviors of Materials [M]. New York: John Wiley & Sons, Inc, 1994.448-486.
[7]  Ling Z, Luo L, Dood B. Experimental study on the formation of shear bands and effect of microstructure in 2124Al/SiCP composite under dynamic compression[J]. Jde Physique, 1994, 4(1):453-458.
[8]  Chichili D R, Ramesh K T. Recovery experiments for adiabatic shear localization:a novel experimental technique[J]. JAppMech, 1999, 66(1):10-20.
[9]  Zhou M. Effects of microstructure on resistance to shear localization for a class of metal matrix composites[J]. Fatigue & Fracture of Engineering Materials & Structure, 1998, 21(1):425-438.
[10]  Dai L H, Ling Z, Bai Y L. A strain gradient-strengthening law for particle reinforced metal matrix composites[J]. Scripta Materialia, 1999, 41(3):245-251.
[11]  Dai L H, Ling Z, Bai Y L. Size-dependent inelastic behavior of particle reinforced metal matrix composites[J]. Composites Science and Technology , 2001,61(5):1057-1063.
[12]  Dai L H, Ling Z, Bai Y L. Strain gradient effect on initiation of adiabatic shear localization in metal matrix composites[J]. Key Engineering Materials, 2000, 177-180:401-406.
[13]  Gao H, Huang Y, Nix W D, et al. Mechanism-based strain gradient plasticity I.Theory[J]. Journal of the Mechanics and Physics of Solids, 1999, 47(10):1239-1263.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133