基于分数阶流变模型的铁基块体非晶合金黏弹性行为研究

廖光开; 龙志林; 许福; 刘为; 张志洋; 杨妙

doi:10.7498/aps.64.136101

摘要

采用分数阶黏弹单元替代经典模型中的黏壶, 结合非晶合金在外加载荷作用下的微观结构演化, 建立了以分数阶微积分表示的非晶合金黏弹性本构模型. 并根据Hertz弹性理论及分数阶黏弹性本构模型, 推导了块体非晶合金在纳米压痕球形压头下的位移与载荷及时间关系式. 基于推导的解析式, 对铁基块体非晶合金在表观弹性区的纳米压痕位移与载荷及时间曲线进行了非线性拟合分析. 相较于整数阶模型, 分数阶模型不仅具有较高的拟合精度, 其拟合参数能敏锐地反应加载速率对块体非晶合金黏弹性行为的影响, 且参数的变化规律与载荷作用下非晶合金微观结构演化呈现出较强的相关性.

关键词:

Abstract

Combined with the microstructure evolution in amorphous alloys under the external load, a fractional order viscoelastic constitutive model is first derived by replacing a Newtonian dashpot in the classical Zener model with the fractional derivative Abel dashpot. Based on the Hertzian theory and the fractional order viscoelastic constitutive model, a relationship between displacement and load (or time) for an instrumental nanoindentation test with a spherical indenter is then proposed. Finally, a series of nanoindentation test data for an Fe-base bulk amorphous alloy are employed to verify the derived model, and its viscoelastic behavior in the apparent elastic region is analyzed in detail. Results show that the fractional order rheological model has higher fitting accuracy than that of the integer order model, and the fitting parameters of the proposed model are more suitable to reflect the effect of the loading rate on the viscoelastic behavior in the alloy studied. Variation of the above-mentioned fitting parameters exhibits a strong correlation with the microstructure evolution during the loading of this Fe-base amorphous alloy.

Keywords:

作者及机构信息

1.
湘潭大学土木工程与力学学院, 湘潭 411105

基金项目: 国家自然科学基金(批准号:51471139,51071134,51401176),湖南省自然科学基金重点项目(批准号:12JJ2024,14JJ3078)和湖南省研究生科研创新项目(批准号:CX2014B278)资助的课题.

Authors and contacts

1.
College of Civil Engineering and Mechanics, Xiangtan University, Xiangtan 411005, China

Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 51471139, 51071134, 51401176), the Provincial Key Program of Natural Science Foundation of Hunan, China (Grant Nos. 12JJ2024, 14JJ3078), and the Hunan Provincial Innovation Foundation for Postgraduate, China (Grant No. CX2014B278).

参考文献

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[18]	Xu F 2012 Ph. D. Dissertation (Xiangtan: Xiangtan University) (in Chinese) [许福 2012 博士学位论文(湘潭：湘潭大学)]
[19]	Mandelbrot B B 1982 The Fractal Geometry of Nature (New York: W H Freman) p14-19
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[25]	Lee E H, Radok J R M 1960 J. Appl. Mech. 27 438
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施引文献

[1]	Liu L, Sun M, Chen Q, Liu B, Qiu C L 2006 Acta Phys. Sin. 55 1930 (in Chinese) [柳林, 孙民, 谌祺, 刘兵, 邱春雷 2006 物理学报 55 1930]
[2]	Yang L, Guo G Q 2010 Chin. Phys. B 19 126101
[3]	Imran M, Hussain F, Rashid M, Cai Y Q, Ahmad S A 2013 Chin. Phys. B 22 096101
[4]	Xu F, Ding Y H, Deng X H, Zhang P, Long Z L 2014 Phys. B 450 84
[5]	Liao G K, Long Z L, Yang M, Chen S M, Zou P 2014 Chin. J. Nonfe. Met. 24 2762 (in Chinese) [廖光开, 龙志林, 杨妙, 陈舒敏, 邹萍 2014 中国有色金属学报 2 4 2762]
[6]	Lu Z, Jiao W, Wang W H, Bai H Y 2014 Phys. Rev. Lett. 113 045501
[7]	Wang W H 2011 Physics 40 701 (in Chinese) [汪卫华 2011 物理 40 701]
[8]	Yang Y, Zeng J F, Volland A, Blandin J J, Gravier S, Liu C T 2012 Acta Mater. 60 5260
[9]	Peng H L, Li M Z, Sun B A, Wang W H 2012 J. Appl. Phys. 112 023516
[10]	Yang Y, Zeng J F, Ye J C, Lu J 2010 Appl. Phys. Lett. 97 261905
[11]	Ye J C, Lu J, Liu C T, Wang Q, Yang Y 2010 Nat. Mater. 9 619
[12]	Huo L S, MA J, Ke H B 2012 J. Appl. Phys. 111 113522
[13]	Huo L S, Zeng J F, Wang W H, Liu C T, Yang Y 2013 Acta Mater. 61 4329
[14]	Peng J, Long Z L, Wei H Q, Li X A, Zhang Z C 2009 Acta Phys. Sin. 58 4059 (in Chinese) [彭建, 龙志林, 危洪清, 李乡安, 张志纯 2009 物理学报 58 4059]
[15]	Chen W, Sun H G, Li X C 2010 The use of fractional derivative modeling in mechanics and engineering problems (Beijing: Science Press) p12 (in Chinese) [陈文, 孙洪广, 李西成 2010 力学与工程问题中的分数阶导数建模 (北京:科学出版社)] p12
[16]	Yin D S, Ren J J, He C L, Chen W 2007 Chin. J. Rock Mech. Eng. 26 1899 (in Chinese) [殷德顺, 任俊娟, 和成亮, 陈文 2007 岩石力学与工程学报 26 1899]
[17]	Chen H S, Li M M, Kang Y G, Zhang S L 2008 Chem. J. Chin. Univ. 29 1271 (in Chinese) [陈宏善, 李明明, 康永刚, 张素玲 2008 高等学校化学学报 29 1271]
[18]	Xu F 2012 Ph. D. Dissertation (Xiangtan: Xiangtan University) (in Chinese) [许福 2012 博士学位论文(湘潭：湘潭大学)]
[19]	Mandelbrot B B 1982 The Fractal Geometry of Nature (New York: W H Freman) p14-19
[20]	Ma D, Stoica A D, Wang X L 2009 Nat. Mater. 8 30
[21]	Zhang C Y 2006 Viscoelastic Fracture Mechanics (Beijing: Science Press) p16
[22]	Koeller R C 1984 J. Appl. Mech. 51 299
[23]	Crothers D S F, Holland D, Kalmykov Y P, Coffey W T 2004 J. Mol. Liq. 114 27
[24]	Kai Diethelm 2002 J. Math. Anal. Appl. 265 229
[25]	Lee E H, Radok J R M 1960 J. Appl. Mech. 27 438
[26]	Wang Z F, Zhang G Z, Liu G 2008 J. Chem. Eng. Chin. Univ. 22 351 (in Chinese) [王志方, 张国忠, 刘刚 2008 高校化学工程学报 22 351]
[27]	Long Z L, Shao Y, Xie G Q, Zhang P, Shen B L, Inoue A 2008 J. Allo. Comp. 462 52
[28]	Wang W H 2014 Sci. Sin-Phys. Mech. Astron. 44 396 (in Chinese) [汪卫华 2014 中国科学: 物理学力学天文学 44 396]

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