Acta Metall Sin  1996, Vol. 32 Issue (12): 1258-1264    DOI:

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RANDOMNESS AND FUZZINESS OF MESCO DUCTILE FRACTURE FOR METALLIC MATERIALS

LU Zhenzhou;YUE Zhufeng;ZHENG Changqing(Northwestern Polytechnical University;Hi＇an 710072)(Manuscript received 1996-05-28; in revised form 1996-07-29)

LU Zhenzhou;YUE Zhufeng;ZHENG Changqing(Northwestern Polytechnical University;Hi＇an 710072)(Manuscript received 1996-05-28; in revised form 1996-07-29). RANDOMNESS AND FUZZINESS OF MESCO DUCTILE FRACTURE FOR METALLIC MATERIALS. Acta Metall Sin, 1996, 32(12): 1258-1264.

Abstract References Related Articles Recommended Metrics Download:  PDF(464KB)  Export:  BibTeX | EndNote (RIS)       Abstract  Based on the macro-and mesco-experimental results of four steels ,30CrMnSiA,40CrNiMoA,No.45 and No.20,the random and fuzzy properties of fracture are studied.The isolated void model is used as an example,and the fracture occures as the void radius R is greater than the critical Rc. The void radius can be expressed as R=R0exp[C1exp(C2Rσ)εp](R0 is the initial void radius, Rσ the stress triaxiality,εp the plastic strain, C1and C2 are model parameters) .The initial and critical radii of voids are in lognormial distributions and the other parametrs in normal distributions. The calculated fracture characteristics of the four steels in different stress states and strains are more near to the experimental results taking the random fracture model than the deterministic fracture model.The illustrative calculation shows that fuzziness is the nature of fracture state,and with appropriate values the fuzzy model can agree well with the experimental results. Key words:  probability      random      fuzziness      mescofracture      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1996/V32/I12/1258 1ProvanJW著,航空航天部AFFD系统工程办公室译,概率断裂力学和可靠性．北京:航空工业出版社,1989:2332王光远．工程软设计理论．北京:科学出版社,1990:2393RiceJR,TraceyJ．MechPhysSolids,1969;17:2014郑长卿主编．韧性断裂细观力学的初步研究及其应用．西安:西北工业大学出版社,1988:105周利．见:郑长卿主编,裂纹体与无裂纹体统一断裂理论研究文集,西安:西北工业大学出版社,1991:121 [1] WANG Shihong, LI Jian, CHAI Feng, LUO Xiaobing, YANG Caifu, SU Hang. Influence of Solution Temperature on γ→ε Transformation and Damping Capacity of Fe-19Mn Alloy[J]. 金属学报, 2020, 56(9): 1217-1226. [2] ZHANG Haijun, QIU Shi, SUN Zhimei, HU Qingmiao, YANG Rui. First-Principles Study on Free Energy and Elastic Properties of Disordered β-Ti1-xNbx Alloy: Comparison Between SQS and CPA[J]. 金属学报, 2020, 56(9): 1304-1312. [3] Shiwei HAN, Duoqi SHI, Xiaoguang YANG, Guolei MIAO. COMPUTATIONAL STUDY ON MICROSTRUCTURE-SENSITIVE HIGH CYCLE FATIGUE DISPERSIVITY[J]. 金属学报, 2016, 52(3): 289-297. [4] SU Zhenxing WANG Yuchen WANG Shaoqing. FIRST-PRINCIPLES STUDY OF THE PHASE STRACTURES OF Al-Sc ALLOYS[J]. 金属学报, 2010, 46(5): 623-628. [5] HUANG Shuke LIU Jianhui LI Chang'an ZHOU Danchen LI Ning WEN Yuhua. EFFECT OF PRE-DEFORMATION ON STACKING FAULT PROBABILITY AND DAMPING CAPACITY OF Fe-Mn ALLOY[J]. 金属学报, 2009, 45(8): 937-942. [6] Jicheng He. Monte-Carlo Simulation for Fractal Growth of inclusions in the Continuous Casting Mold[J]. 金属学报, 2008, 44(6): 698-702 . [7] Zhiyong Chen. TEXTURE EVOLUTION OF POLYCRYSTALLINE ALUMINUM DURING ROLLING DEFORMATION － I. Experimental Study[J]. 金属学报, 2008, 44(11): 1316-1321 . [8] Zhiyong Chen. TEXTURE EVOLUTION OF POLYCRYSTALLINE ALUMINUM FOR ROLLING DEFORMATION － II. Theoretical Simulation[J]. 金属学报, 2008, 44(11): 1322-1331 . [9] ZHANG Ke-Shi; Yun-Qiang GUO; Lin LIU. Microscopic Creep and Damage of γ-γ＇Two-phase Nickel-base Superalloy under Elevated-temperature[J]. 金属学报, 2007, 43(9): 961-967 . [10] Shu-Ke Huang; LI Ning. Effect of deep-cooling and measurement temperature on damping capacity of Fe-Mn alloy[J]. 金属学报, 2007, 43(8): 807-812 . [11] MENG Qingping; RONG Yonghua; T.Y. Hsu XU Zuyao. Nucleation Of Martensitic Transformation[[J]. 金属学报, 2004, 40(4): 337-341 . [12] LI Xueliang;LIN Jianxin (Hefei Polytechnical University). RANDOM FRACTAL STUDY OF FRACTURE SURFACE OF FREE-MACHINING STEELS[J]. 金属学报, 1994, 30(8): 380-384. [13] XIA Yuebo;WANG Zhongguang State Key Laboratory for Fatigue and Failure of Materials; Institute of Metal Research; Academia Sinica; Shenyang. CYCLIC DEFORMATION OF COARSE GRAINED POLYCRYSTALLINE PURE Al Ⅰ. SLIP CHARACTERISTICS[J]. 金属学报, 1992, 28(2): 3-8. No Suggested Reading articles found! Viewed Full text Abstract Cited   Shared      Discussed