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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......
YJ. Cent. South Univ. Technol. (2009) 16: 0482-0487 DOI: 10.1007/s11771-009-0081-8 Constitutive equations and finite element implementation of strain localization in sand deformation HUANG... to the implementation of a modified model of the saturated sand. Then the criterion for the onset of localization was derived and utilized to detect instability. The constitutive model was implemented in a finite......
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......
于 Johnson-Cook 模型的TC16 钛合金动态本构关系[J]. 中国有色金属学报, 2008, 18(3): 505-510. YANG Yang, ZENG Yi, WANG Bing-feng. Dynamic constitutive relationship of TC16 titanium alloy based on Johnson-Cook model[J...则等多种理论和方法.以金属中最为常用的Mises屈服准则,等向硬化法则为例,给出了TC11钛合金的修正Johnson-Cook模型数值验算. 表1 模型的材料参数值 Table 1 Values of model parameters 图6 模型表征结果和试验结果的对比 Fig. 6 Relationship between flow......
multiplier that is determined from the consistency condition df=0. The elasto-plastic constitutive relationship can be represented as  ...Trans. Nonferrous Met. Soc. China 26(2016) 822-834 An elasto-plastic constitutive model for soft rock considering mobilization of strength Hang-zhou LI1, Guang-dong XIONG1, Gui-ping ZHAO2 1......
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at a certain temperature and stress as the example, the integral creep constitutive equation and the differential stress-strain constitutive relationship were established based on the relevant rheological... constitutive relationship were established under a certain stress and temperature based on the relevant rheological model, and the integral core function was also obtained. Simultaneously......