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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... loci of aluminum alloy sheets well, whereas the Mises yield criterion overestimates the yield stress in all the contours. Key words: aluminum alloy sheet; biaxial tensile test; stress-strain curve......
J. Cent. South Univ. Technol. (2008) 15(s1): 322-325 DOI: 10.1007/s11771-008-372-5 Variation of yield stress of Daqing crude oil with pipelining history LI Li(李 立)1, HOU Lei(侯 磊)2, SUN Li-xin(孙... University of Petroleum (Beijing), Beijing 102249, China) Abstract: The yield stress of waxy crude oil is a fundamental parameter in the calculation of pipelining technique and analysis of flow......
loading path with the same method as that for determining the experimental initial yield locus. Then the subsequent yield locus of the "original" specimens was constructed in the plane stress space. 3...;is equivalent stress. Eq.(9) means isotropic hardening when α=0 and kinematic hardening when is a constant. Yld2000-2d yield criterion and L-C kinematic hardening model are used in this work......
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loading + the fabrication stress + the residual stress) should be below a threshold level, which, in the absence of other data, could be (conservatively) estimated to be about 50% of the tensile yield... and dilute chloride solutions and that the threshold stress for SCC is commonly about half the yield stress. There can be, nevertheless, significant SCC differences between alloys[18,21-22......
Characterization of Yield Stress Development of Cement Paste by Electrical ResistivityMbujje Joel Webster1,魏小胜1,ZHOU Kongjin21. School of Civil Engineering and Mechanics, Huazhong University of Science and Technology2. State Key Laboratory of Silicate, Wuhan University of Technology摘 要:Yield stress development of cement paste is potentially governed......
was derived by means of geometrical analysis. Its specific plastic work rate expressed as a linear function of the yield stress, the maximum and minimum strains was also deduced and compared with that of Mises criterion. The physical meaning of the proposed yield criterion is that yielding of materials begins when the shear yield stress τs reaches the magnitude of 0.594σs. By introducing the Lode......
; (7) where σGB, and are denoted as the flow stress, yield stress and plastic strain of grain boundary; hGB, nGB... the entire overall stress-strain curve, further the yield strength of such a composite system can be evaluated by the stress at 0.2% offset strain. 3 Stress-strain relation of porous NC materials......