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. The model was composed of three submodels in series, which describe elastoplastic, viscoelastic and viscoplastic characteristics respectively. The constitutive equation was established for uniaxial... is described by a submodel combining two springs and a frictional element. Its constitutive equation can be written as Fig.1 Constitutive scheme for viscoelastoplastic model ......
alloy at the strain rates ranging from 1×10–1to 1×10–4s–1at room temperature.A modified Johnson-Cook constitutive equation based on a recent strain hardening equation was proposed to predict the flow stresses of GW103K alloy.Comparisons between the predicted and experimental results showed that the modified Johnson-Cook constitutive equation was able to predict the flow stresses of the RE-containing......
alloy at the strain rates ranging from 1×10–1to 1×10–4s–1at room temperature.A modified Johnson-Cook constitutive equation based on a recent strain hardening equation was proposed to predict the flow stresses of GW103K alloy.Comparisons between the predicted and experimental results showed that the modified Johnson-Cook constitutive equation was able to predict the flow stresses of the RE-containing......
Incoloy 800H高温变形流动应力预测模型孙朝阳1,刘金榕1,李瑞1,张清东1(1.北京市北京科技大学机械工程学院)摘 要:采用Gleeble-1500热模拟实验机研究了Incoloy 800H合金在变形温度为1273-1473 K和应变速率为0.01-10 s~(-1)条件下的流动应力行为.采用双曲正弦函数建立了Incoloy 800H高温条件下的流动应力本构方程,以六次多项式考虑了应变量耦合因素对本构关系的影响.研究结果表明,Incoloy 800H在热压缩变形过程中,低应变速率和高应变速率条件下分别......
and the flow stress constitutive equation was obtained. The results show that the flow stress of B93 alloy is controlled by both strain rate and deformation temperature, and the flow stress decreases... deformation; high temperature flow stress; constitutive equation B93高强铝合金是一种新型铝合金结构材料,具有良好的铸造,锻造和挤压工艺性能及淬透性,可靠的耐蚀性和疲劳强度.不仅适用于生产棒材,同时还特别适用于制作大型锻件等加工制品,是一种性能优良的高强锻造铝合金[1-3].B93合金的化学成分中不含Mn和Cr,改善了合金的铸造性......
-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... of MRF, the equation for nominal shear rate is defined. Effects of magneticinduction strength, mass fraction of iron particles, the shear rate etc on the shear stress of MRF are discussed. Finally......
of materials during hot working, such as deformation temperature, deformation rate and deformation degree. The constitutive equation of material can express the relation among the hot working parameter of flow stress, the strain rate and the deformation temperature. The traditional constitutive equation is classified as two groups: the phenomenological and statistical constitutive equation......
needs to be further studied according to the actual cyclic stress-strain curve. The conventional constitutive equation σ=Aεn is based on the results only corresponding to the cyclic strengthening stage...Discussion of the Constitutive Relation on Cyclic Stress-Strain of Engineering Materials唐俊武,王建国,徐世平,王枨摘 要:<正> Based on the experimental results......
on the Arrhenius equation for this steel was established using the true stress-strain data obtained from a hot compression test.Furthermore,a new constitutive model based on the Z-parameter was proposed...Constitutive Modeling and Dynamic Recrystallization Mechanisms of an Ultralow-carbon Microalloyed Steel During Hot Compression Tests李宁,HUANG Yao,HAN Renheng,BAO Ziming,ZHU Yanqing,ZHANG Hexin,赵成志Key......
deformation degree is 60%. The alloy microstructure was observed with Polyvar-MET metallographic microscope. 3 Results and discussion 3.1 Flow stress analysis and constitutive equation establishment... Hot-compression constitutive relation of as-cast AZ31 magnesium alloy SHI Ti(史褆), YU Kun(余琨), LI Wen-xian(黎文献), WANG Ri-chu(王日初), WANG Xiao-yan(王晓艳), CAI Zhi-yong(蔡志勇) School of Materials......
