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...
工程力学  2012 

数字图像相关法测量聚碳酸酯板应力强度因子

DOI: 10.6052/j.issn.1000-4750.2011.04.0250

Keywords: 数字图像相关,应力强度因子,张开型,线性最小二乘,PC

Full-Text   Cite this paper   Add to My Lib

Abstract:

本文以数字图像相关方法测量了聚碳酸酯板的张开型应力强度因子(SIF)。实验过程中以聚碳酸酯标准紧凑拉伸式样为样本,由数字图像相关(DIC)方法提取不同载荷下裂纹附近的全场位移。在已计算得到全场位移的情况下,由线弹性断裂理论可知,弹性区域内每一点位移可表示为SIF的函数。在计算SIF时考虑了实验中不可避免存在的刚体平移与转动的影响,应力强度因子、刚体平移与转动可由最小二乘法计算得到;还讨论了位移场的选择及位移展开项项数对SIF的影响。实验结果与理论值进行了比较,结果显示DIC方法准确地测量了聚碳酸酯板的应力强度因子,因此DIC为测量SIF提供了一种有效的试验方法。

References

[1]  冯英先, 曹阳. 聚碳酸脂板快速扩展裂纹的弹塑性研究[J]. 力学与实践, 1991, 13(5): 20―23.
[2]  Feng Yingxian, Cao Yang. Elastoplastic study of the rapid expansion of crack in polycarbonate plate [J]. Mechanics and Practice, 1991, 13(5): 20―23. (in Chinese)
[3]  赖曾美, 苗张木. Ⅰ型平面应力裂纹弹塑性行为的实验观察[J]. 力学学报, 1987, 19(增刊1): 280―285.
[4]  Lai Zengmei, Miao Zhangmu. An experimental observation of the plastic strain field near the crack tip [J]. Acta Mechanica Sinica, 1987, 19(Suppl 1): 280―285. (in Chinese)
[5]  宋之敏, 黄婉霞, 樊庆文, 等. 疲劳与蠕变复合作用下聚碳酸酯的断裂行为[J]. 塑料工业, 2003(5): 38―40.
[6]  Song Zhimin, Huang Wanxia, Fan Qingwen, et al. Study on breaking performance of polycarbonate in fatigue and creep co-action [J]. Plastics Industry, 2003(5): 38―40. (in Chinese)
[7]  Dallly J W, Sanford R J. Strain gage methods for measuring the opening-mode stress intensity factor [J]. Experimental Mechanics, 1987, 27: 381―388.
[8]  Bonesteel R M, Pipers D E, Davinroy A T. Compliance and calibration of double cantilever beam (DCB) specimens [J]. Engineering Fracture Mechanics, 1978, 10: 425―428.
[9]  Wang W C, Hwang C H. Experimental analysis of vibration characteristics of an edge-cracked composite plate by ESPI method [J]. International Journal of Fracture, 1998, 91(4): 311―321.
[10]  Pan B, Xie H M, Hua T, Asundi A. Measurement of coefficient of thermal expansion of films using digital image correlation method [J]. Polymer Testing, 2009, 28: 75―83.
[11]  Chao Y-J, Luo P F, Kalthoff J F. An experimental study of the deformation fields around a propagating crack tip [J]. Experimental Mechanics, 1998, 38: 79―85.
[12]  Vendroux G, Knauss W G. Submicron deformation field measurements: Part 2. Improved digital image correlation [J]. Experimental Mechanics, 1998, 38: 86―92.
[13]  Pan B, Qian K M, Xie H M, Asundi A. Two-dimensional Digital image correlation for in-plane displacement and strain measurement: A review [J]. Measurement Science and Technology, 2009, 20: 062001.
[14]  沈康成. 断裂力学[M]. 上海: 同济大学出版社, 1996: 9―13.
[15]  Shen Kangcheng. Fracture mechanics [M]. Shanghai: Tongji University Press, 1996: 9―13. (in Chinese)
[16]  Barker D B, Sanford R J, Chona R. Determining K and related stress-field parameters from displacement fields [J]. Experimental Mechanics, 1985, 25: 399―407.
[17]  Luo P F, Huang F C. Application of stereo vision to the study of mixed-mode crack-tip deformations [J]. Optics and Lasers in Engineering, 2000, 33: 349―368.
[18]  Rosakis A J, Ravi-Chandra K. On crack tip stress state: An experimental evaluation of three-dimensional effects [J]. International Journal of Solids and Structures, 1986, 22(2): 121―134.
[19]  Leven Parnas, Omer Bilir. Strain gage methods for measurement of opening mode stess Intensity factor [J]. Engng Fracture Mechanics, 1996, 55(3), 485―492.
[20]  崔振源. 断裂韧性测试原理和方法[M]. 上海: 上海科技大学出版社, 1987: 15.
[21]  Cui Zhenyuan. Principles and methods of fracture toughness test [M]. Shanghai: University of Science and Technology Press, 1987: 15. (in Chinese)

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133