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Stress-strain curves for different loading paths and yield loci of aluminum alloy sheets WU Xiang-dong(吴向东)1, 2, WAN Min(万 敏)1, HAN Fei(韩 非)1, WANG Hai-bo(王海波)1 1. School... 430074, China Received 28 July 2006; accepted 15 September 2006 Abstract: To carry out biaxial tensile test in sheet metal, the biaxial tensile testing system was established. True stress-true strain......
J. Cent. South Univ. (2018) 25: 2712-2721 DOI: https://doi.org/10.1007/s11771-018-3948-8 Hydraulic bulging process with axial feedings and strain field of U-shaped metal bellows HAO Zeng-liang(郝增亮.... The finite element simulation and experiment of bellows formed by the traditional and improved hydraulic bulging processes were conducted. The grid strain measurement system analysis results of strain......
J. Cent. South Univ. Technol. (2008) 15: 569-573 DOI: 10.1007/s11771-008-0107-7 Complete splitting process of steel fiber reinforced concrete at intermediate strain rate LUO Zhang(罗 章)1... of steel fiber reinforced concrete (SFRC) at intermediate strain rate was studied by experiment. The basic information of a self-developed SFRC dynamic test system matching with Instron 1342 materials......
Preparation of AZ91D magnesium alloy semi-solid billet by new strain induced melt activated method JIANG Ju-fu(姜巨福)1, 2, LUO Shou-jing(罗守靖)1, ZOU Jing-xiang(邹经湘)2 1. School of Materials Science...; accepted 6 April 2006 Abstract:New strain induced melt activated (new SIMA) method for preparing AZ91D magnesium alloy semi-solid billet is introduced by applying equal channel angular extrusion......
Inner-product of strain rate vector through direction cosine in coordinates for disk forging ZHAO De-wen(赵德文), JIN Wen-zhong(金文忠), WANG Lei(王 磊), LIU Xiang-hua(刘相华) State Key Laboratory... strain rate for disk forging with bulge was expressed in terms of two-dimensional strain rate vector, and then its direction cosines were determined by the ratio of coordinate increments. Furthermore......
Article ID: 1003-6326(2005)05-1009-05 Solution for slab forging with bulge between two parallel platens by strain rate vector inner-product integration and series expansion ZHAO De-wen(赵德文... was developed. First, effective strain rate for slab forging with bulge was expressed in terms of two-dimensional strain rate vector, and its inner-product was integrated term by term. Second, a summation......
EFFECTS OF TEST TEMPERATURE AND STRAIN RATE ON THE MECHANICAL PROPERTIES IN AN INTERCRITICALLY HEAT-TREATED BAINITE-TRANSFORMED STEEL D.Wu1,Z.Li1 (1.The State Key Laboratory of Rolling...-treated bainitetransformed steel. The elongation and the strength-ductility balance of the steel could be enhanced considerably due to strain-induced martensite transformation and transformationinduced......
J. Cent. South Univ. (2021) 28: 297-310 DOI: https://doi.org/10.1007/s11771-021-4603-3 Geotechnical stability analysis considering strain softening using micro-polar continuum finite element method.... Due to the coupling effects of lc and strain softening, softening behavior of geomaterial tends to be postponed. Additionally, the bearing capacity of a geotechnical system may be significantly......
J. Cent. South Univ. Technol. (2011) 18: 1619-1625 DOI: 10.1007/s11771-011-0881-5 Strain field investigation of limestone specimen under uniaxial compression loads using particle image velocimetry..., global filter and local filter. The cubic interpolation was utilized if the displacements without a number were encountered. The full-field strain was then obtained using the local least square method......
resulting in strain rockburst, and ultimately forming a V-shaped notch. The far-field principal stress for the initial failure of the tunnel shows a good positive linear correlation with the depth... the tunnel should be increased accordingly to prevent spalling. Key words: deep underground engineering; circular tunnels; spalling; strain rockburst; true-triaxial loading; V-shaped notch Cite this article......