AD95陶瓷的层裂强度及冲击压缩损伤机理研究

孙占峰; 贺红亮; 李平; 李庆忠

doi:10.7498/aps.61.096201

摘要

采用激光位移干涉测试技术测量了AD95 陶瓷在一维应变冲击压缩下的自由面或样品/窗口界面粒子速度剖面, 确定了层裂强度及其与加载应力的变化关系, 在此基础上讨论了冲击压缩损伤程度与加载应力的关系. 研究结果表明: AD95陶瓷发生冲击压缩损伤的阈值应力约为3.7 GPa, 小于其雨贡纽弹性极限(HEL, 约5.47 GPa); 小于阈值应力不发生冲击压缩损伤, 层裂强度随加载应力的增加逐渐增大; 大于阈值应力冲击压缩损伤快速发展, 层裂强度迅速降低; 在HEL附近层裂强度降低到零, 丧失了抗拉能力, 表明材料发生了严重的冲击压缩损伤.

关键词:

氧化铝 /
陶瓷 /
层裂强度 /
压缩损伤

Abstract

The relationship between spall strength and impact stress of AD95 ceramics which is in a one-dimensional strain state is determined by velocity profile measurement of the free surface or the sample/window interface. All fiber displacement interferometer system for any reflector is used in velocity measurement. Further the relationship between shock compressive damage degree and impact stress is discussed. The results indicate that the stress threshold of AD95 ceramics against shock compressive damage is about 3.7 GPa, which is less than its Hugoniot Elastic Limit (HEL, about 5.47 GPa). When impact stress is less than the threshold, no compressive damage occurs, and the spall strength increases with impact stress gradually. When impact stress is greater than the threshold, shock compressive damage occurs and develops rapidly which leads to the decrease of the spall strength with impact stress. The spall strength falls to zero when the impact stress increases up to about the HEL, which indicates that the material has lost the ability to resist the tensile stress and severe shock compressive damage has happened.

Keywords:

作者及机构信息

1.
中国工程物理研究院流体物理研究所冲击波物理与爆轰物理国防科技重点实验室, 绵阳 621900

基金项目: 国家自然科学基金重点项目(批准号: 10632080)资助的课题.

Authors and contacts

1.
National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621900, China

Funds: Project supported by the Key Program of the National Natural Science Foundation of China (Grant No.10632080).

参考文献

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[25]	Marsh S P 1980 LASL Shock Hugoniot Data (Berkeley·Los Angeles·London: University of California Press) p57, 166, 446
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施引文献

[1]	Grady D E 1998 Mechanics of Materials 29 181
[2]	Brace W F, Paulding Jr B W, Scholz C 1966 J. Geophys. Res. 71 3939
[3]	Bar-on E, Partom Y, Rubin M B, Yankelevsky D J 2002 Int. J. Impact Engng. 27 509
[4]	Bar-on E, Partom Y, Rubin M B, Yankelevsky D J 2002 Shock Compression of Condensed Matter (edited by Furnish M D, Thadhani N N et al AIP, Georgia, 2001) p739
[5]	Bar-on E 2007Shock Compression of Condensed Matter(edited by Elert M, Furnish M D et al AIP, Hawaii, 2007) p223
[6]	Bourne N K, Millett J, Rosenberg Z 1998 J. Mech. Phys. Solids 46 1887
[7]	Liu Z F, Chang J Z, Yao G W 2006 Applied Mathematics and Mechanics 38 626 (in Chinese)[刘占芳, 常敬臻, 姚国文2006力学学报38 626]
[8]	Chen D P, He H L, Li M F, Jing F Q 2007 Acta Phys. Sin. 56 423 (in Chinese)[陈登平, 贺红亮, 黎明发, 经福谦2007 56 423]
[9]	Grady D E, Moody R L 1996 Sandia Report SAND96-0551, UC- 704
[10]	Rosenberg Z 1991 Shock Compression of Condensed Matter (edited by Schmidt S C, Dick R D et al Elsevier Science, NewYork, 1991) 439
[11]	Bourne N K, Millett J, Chen M W 2007Shock Compression of Condensed Matter (edited by Elert M, Furnish M D et al AIP, Hawaii, 2007) 739
[12]	Chen M W, McCauley J W, Dandekar D P, Bourne N K 2006 Nature Materials 5 614
[13]	Qi M L, He H L, Yan S L 2007 Acta Phys. Sin. 56 5965(in Chinese)[祁美兰, 贺红亮, 晏石林2007 56 5965]
[14]	Cagnoux J, Longy F 1988 J. Phys. 40 3
[15]	Dandekar D P, Bartkowski P 1994 High Pressure Science and Technology (edited by Schmidt S C, Shaner J W et al AIP, NewYork, 1993) 733
[16]	Bourne N K 2001 Proc. R. Soc. A 457 2189
[17]	Longy F, Cagnoux J 1989 J. Am. Ceram. Soc. 72 971
[18]	Staehler J M, Predebon W W, Pletka B J 1994 High Pressure Science and Technology (edited by Schmidt S C, Shaner J W et al AIP, NewYork, 1993) 745
[19]	Gust W H, Holt A C, Royce E B 1973 J. Appl. Phys. 44 550
[20]	Bless S J, Yaziv D, Rosenberg Z 1986 Shock Waves in Condensed Matter (edited by Gupta Y M Plenum, New York, 1985) 419
[21]	Murray N H, Bourne N K, Rosenberg Z, Field J E 1998 J. Appl. Phys. 84 734
[22]	Rosenberg Z, Yeshurun Y 1985 J. Appl. Phys. 58 3077
[23]	Yaziv D, Bless S J, Rosenberg Z 1986 Shock Waves in Condensed Matter (edited by Gupta Y M Plenum, New York, 1985) 425
[24]	Grady D E, Kipp M E 1993 High-pressure Shock Compression of Solids (edited by Asay J R, Shahinpoor M, New York: Springer- Verlag New York Inc.) 265
[25]	Marsh S P 1980 LASL Shock Hugoniot Data (Berkeley·Los Angeles·London: University of California Press) p57, 166, 446
[26]	Xia M F, Han W S, Ke F J, Bai Y L 1995 Advances in Mechanics 25 1 (in Chinese)[厦蒙棼, 韩闻生, 柯孚久, 白以龙1995力学进展 25 1]
[27]	Xia M F, Han W S, Ke F J, Bai Y L 1995 Advances in Mechanics 25 145 (in Chinese)[厦蒙棼, 韩闻生, 柯孚久, 白以龙1995力学进展25 145]

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