A new technology for ceramics matrix composites-ceramics matrix composite thixoforming in pseudo-semi-solid state based on semi-solid metal process and powder metallurgy technology were proposed. The rheological behav...A new technology for ceramics matrix composites-ceramics matrix composite thixoforming in pseudo-semi-solid state based on semi-solid metal process and powder metallurgy technology were proposed. The rheological behavior of Al2O 3n/Alμ composite was studied by isothermal compression in pseudo-semi-solid state. The variation rules of the true stress-true strain, rheological behavior and the influencing factors were also analyzed. The results show that the flow stress decreases evidently with the increasing pseudo-semi-solid temperature, and that the trend of the true stress-true strain curve of the composite in pseudo-semi-solid state can be divided into four stages: increase, decline, re-increase and re-decline.展开更多
This paper is concerned with the existence and uniqueness of nonnegative classical solutions to the initial-boundary value problems for the pseudo-parabolic equation with strongly nonlinear sources. Furthermore, we di...This paper is concerned with the existence and uniqueness of nonnegative classical solutions to the initial-boundary value problems for the pseudo-parabolic equation with strongly nonlinear sources. Furthermore, we discuss the asymptotic behavior of solutions as the viscosity coefficient k tends to zero.展开更多
This paper is concerned with large time behavior of solutions for the semilinear pseudo-parabolic equation in exterior domains. It is revealed that the inhomogeneous boundary condition may develop large variation of s...This paper is concerned with large time behavior of solutions for the semilinear pseudo-parabolic equation in exterior domains. It is revealed that the inhomogeneous boundary condition may develop large variation of solutions with the evolution of time.展开更多
文摘A new technology for ceramics matrix composites-ceramics matrix composite thixoforming in pseudo-semi-solid state based on semi-solid metal process and powder metallurgy technology were proposed. The rheological behavior of Al2O 3n/Alμ composite was studied by isothermal compression in pseudo-semi-solid state. The variation rules of the true stress-true strain, rheological behavior and the influencing factors were also analyzed. The results show that the flow stress decreases evidently with the increasing pseudo-semi-solid temperature, and that the trend of the true stress-true strain curve of the composite in pseudo-semi-solid state can be divided into four stages: increase, decline, re-increase and re-decline.
基金The NSFC,CPSF,SRFDP and 973 Program(2010CB808002)
文摘This paper is concerned with the existence and uniqueness of nonnegative classical solutions to the initial-boundary value problems for the pseudo-parabolic equation with strongly nonlinear sources. Furthermore, we discuss the asymptotic behavior of solutions as the viscosity coefficient k tends to zero.
基金Supported by the National Natural Science Foundation of China(Grant Nos.11571062 11871134+2 种基金 11771156)the Fundamental Research Funds for the Central Universities(Grant No.DUT19LK02)the Natural Science Foundation of Guangzhou(Grant No.201804010391)
文摘This paper is concerned with large time behavior of solutions for the semilinear pseudo-parabolic equation in exterior domains. It is revealed that the inhomogeneous boundary condition may develop large variation of solutions with the evolution of time.
