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was analyzed, considering the non-Darcian flow described by exponent and threshold gradient, along with the linear change of vertical total stress with depth and time together. 2 Derivation of governing...J. Cent. South Univ. (2012) 19: 562-571 DOI: 10.1007/s11771-012-1040-3 One-dimensional consolidation of double-layered soil with non-Darcian flow described by exponent and threshold gradient LI Chuan......
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of zinc content on the high temperature creep property and creep stress exponent of AZ31 magnesium alloy was investigated at the stress ranging from 5.13 MPa to 11.06 MPa. The results show that the creep rate increases and the static creep stage shortens with increasing zinc content in AZ31 magnesium alloy at the same given creep conditions. The stress exponent is decided not only by zinc content......
size of about 19 μm is 117% at strain rate of 10-3 s-1 and temperature of 450 ?C. Stress exponent and activation energy were characterized to clarify the deformation mechanisms. The enhanced...; stress exponent 1 Introduction In recent years, magnesium alloys are widely applied because of their advantages of low density, high specific strength and strong corrosion resistance, etc. Compared......
. The calculated value of stress exponent, n=6.3, suggests that the compressive creep behavior of the ageing-treated Mg-5%Sn alloy is controlled by dislocation creep at the temperature of 473 K and the stresses from 25 MPa to 35 MPa. Key words: Mg alloy; aging treatment; creep deformation; stress exponent ......
sensitive exponent and stress exponent are different at various deformation conditions changing from 1i3.6 to 176.3k J/mol,0.125 to 0.167 and 6 to 8 respectively.A flow stress model for AZ61 alloy is derived by analyzing the stress data based on hot compression test.It is demonstrated that the flow stress model including strain hardening exponent and strain softening exponent is suitable to predicate......
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. The experimental data show that the material exhibits enhanced tensile ductilities of over 100% at 400 and 450 °C with stress exponent of 4.29 and activation energy of 149.60 kJ/mol, and initial fine... creep, based on which a model can successfully simulate the deformation behavior. Key words: AZ80 magnesium alloy; tensile behavior; superplasticity; creep; stress exponent 1 Introduction Magnesium (Mg......
Effect of nonlinear impact damping with non-integer compliance exponent on gear dynamic characteristicsWU Li-juan(吴丽娟), TANG Jin-yuan(唐进元), CHEN Si-yu(陈思雨) (State Key Laboratory of High Performance... stiffness was established. Systematic analyses of the dynamic responses were performed. First, the nonlinear damping coefficient was considered as a constant parameter with two types of compliance exponent......
