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Electronical measurement of incision iron specimens’ fracture proceeding and calculation of the structure bearing capacity |
WANG Li-Min SUN Ming-Yuan |
山东理工大学 交通与车辆工程学院 |
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Cite this article:
WANG Li-Min SUN Ming-Yuan. Electronical measurement of incision iron specimens’ fracture proceeding and calculation of the structure bearing capacity. Acta Metall Sin, 2008, 44(7): 853-858 .
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Abstract The crack tip’s break damage process area of the material like cast iron, can be simplified for crack with cohesive force. To investigate the fracture process of iron and the calculation method of the specimens’ maximum bearing capacity, the three-point bending experiment of eight kinds of size incision specimens were tested, and two of the specimens was measured with electrical strain gages equipment. Through the experiment data, a series of curves were obtained and analyzed, such as the curves of displacement of load point with loading on the typical specimens, and the curve of fracture damaged area deformation with the loading, the relationship curve of beam neutral axes position and loading, the curve of position of cohesive crack tip and loading. The Stress Intensity Factor of the different size fracture specimens was calculated. For different size specimens, the computation method of structure bearing capacity was presented through the stress intensity factor’s computation formula and the fracture criterion. The theoretical calculated value was compared with the tested results, and the relative error of them is not big. Then, the method of estimating structures’ maximum bearing capacity is feasible.
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Received: 05 November 2007
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[1]Cherepanov G P.Method of Fracture Mechanics:Solid Matter Physics.Dordrecht:Kluwer Academic Publishers, 1997:3 [2]Fan T Y.Fracture Theoretical Basis.Beijing:Science and Technology Publishing House,2003:77 (范天佑.断裂理论基础.北京:科学技术出版社,2003:77) [3]Wang L M,Xu S L,Ren C B.Chin Eng Sci,2007;9:30 (王利民,徐世娘,任传波.中国工程科学.2007;9:30) [4]Jenq Y S,Shah S P.J Eng Mech,1985;111:1227 [5]Xu S L,Reinhardt H W.Int J Fract,1999;98:111 [6]Huang K Z,Yu S W.Elastic-plastic Fracture Mechanics. Beijing:Tsinghua University Press,1985:36 (黄克智,余寿文.弹塑性断裂力学.北京:清华大学出版社,1985:36) [7]Wang D,Du S Y,Wang D F,Zhang R H,Yuan Z P. Fracture Mechanics.Harbin:Harbin Industrial Univer- sity Press,1989:30 (王铎,杜善义,王殿富,张人洪,袁祖培.断裂力学.哈尔滨:哈尔滨工业大学出版社,1989:30) [8]Schlter N,Gimpe F.Comput Mater Sci,1996;7:27 [9]Hill M R,Panontin T L.Eng Fract Mech,2002;69:2163 [10]Chae D,Koss D A.Mater Sci Eng,2004;A366:299 [11]Wang Z Z,Du B P,Li N.Acta Metall Sin,2003;39:843 (王章忠,杜百平,李年.金属学报,2003;39:843) [12]Zhang X Q,Sun Y Q,Zhang Z.Acta Metall Sin,2004;40: 1018 (张晓庆,孙永庆,张峥.金属学报,2004;40:1018) [13]Zhang G P,Takashima K,Higo Y.Acta Metall Sin,2005; 41:337 (张广平,高岛和希,肥後矢吉.金属学报,2005;41:337) [14]Tada H,Paris P C,Trwin G R.The Stress Analysis of Cracks Handbook.3rd Edition,London:ASME Press, 2000:58 [15]Wang L M,Xu S L,Zhao X Q.Sci China,2006;49G:88 (王利民,徐世烺,赵熙强.中国科学,2006;36G:59) |
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