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J. Cent. South Univ. (2012) 19: 93-100 DOI: 10.1007/s11771-012-0977-6 Estimation of surface tension of organic compounds using quantitative structure-property relationship DAI Yi-min(戴益民)1, 2... structure-property relationship (QSPR) model for estimating the solution surface tension of 92 organic compounds at 20 °C was developed based on newly introduced atom-type topological indices. The data......
Trans. Nonferrous Met. Soc. China 25(2015) 1889-1900 Arrhenius-type constitutive model and dynamic recrystallization behavior of V-5Cr-5Ti alloy during hot compression Yu-fei LI1, Zhen-hong WANG2... and the calculated values of friction coefficient m are in the range of 0.45-0.56. Arrhenius-type constitutive equation was developed by regression analysis. The comparison between the experimental......
-rheological fluid; constitutive equation; rheometer; experiment 1 Introduction Magnetorheological fluids(MRF) belong to the newly class of smart materials which are composed of dispersed phase...; (6) where is defined as nominal viscosity. By the application of the theory about dynamical characters for parallel plate[7], the relationship......
Relationship between mechanical properties and grain size of AZ80 at 350 ?C under different strain rates QUAN Guo-zheng(权国政), SONG Tao(宋涛), ZHOU Yi-jun(周一俊), WANG Feng-biao(王凤彪), ZHOU... and great progress has been made[1]. Therefore, the equation for flow stress is numerically analyzed in order to promote the practical application of wrought magnesium alloys. Most of the constitutive......
was proposed based on the continuum hypothesis and elliptical yield criterion. To simulate the densification behaviour, the constitutive model was implemented in Marc computer program. For the relationship between load and displacement, different models were compared and the influence of the parameters in the constitutive equations was determined by means of simulation and experiments. The density......
on the experimental stress relaxation curve, the relationship between creep strain rate and stress has been derived. Then, a set of creep constitutive equations has been built and the values of constants arising in the constitutive equations have been determined by fitting the creep strain rate-stress curve. Close agreement between computed results and experimental ones is obtained for stress relaxation data......
of the particle surface have certain effects on the constitutive relationship of rock compaction stage. The larger the aperture degree between particles is, the longer time the compaction process takes. Under the same strain condition, the greater the roughness is, the slower the stress growth is. In the process of simulating the constitutive relationship of four rock compaction stages, the goodness of fit......
, Mg-1.8Mn-0.4Er-0.2Al alloys with different heat treatments were chosen. The alloys were hot uniaxial compressed on Gleeble-1500 thermo-mechanical simulator. The constitutive relationship of the material... into Table 1 Constitutive constants of In.A alloy obtained from corrected flow stresses at selected strains Fig.4 Relationship between strain and (α?n) value Eq.(3). Fig.5 shows the comparison between......
exponent and deformation activation at elevated temperatures were calculated. The constitutive relationship of the Pb-Mg-Al alloy during hot compression deformation at high temperatures was obtained.... The optimal processing parameters derived from processing map and activation energy are 533 K in temperature and 0.1 s-1 in strain rate.Key words:Pb-Mg-Al alloy; constitutive relationship......
softening mechanisms. Hence, developing the appropriate constitutive relationship to present the complex strain hardening and dynamic softening behavior of metals or alloys is fairly paramount [7,8... reports regarding the constitutive relationship model for Ti2AlNb-based alloys are also quite few. WEI et al [23] studied the flow stress of coarse-grained Ti-22Al-25Nb alloy within the temperature range......