| 1 | 聚对苯二甲酸乙二酯轧制及加热过程中的织构研究显示文摘用X射线面探测器研究了半结晶态聚对苯二甲酸乙二酯(PET)在轧制和随后的加热过程中的织构变化。实验结果表明,PET的初始取向接近随机分布状态,轧制形变后的织构包括{100}<001>组分和不完全纤维织构(<001>//轧制方向),并且形变量愈大,织构愈强;对轧制形变后的PET进行加热处理,发现上述织构组分增强,并且随加热温度升高和加热时间延长进一步增强。X射线平均衍射强度法计算PET结晶度的结果表明,结晶度在轧制形变后大幅下降,然后随加热温度升高和加热时间延长逐渐上升。分析认为,PET在轧制形变后的织构演化符合(100)[001]分子链滑动机制。 | 陈冷 毛卫民 D.Raabe 陈楠 | 2005 | 材料科学与工程学报2005，23，5： | 2 |
| 4 | Lattice Boltzmann Modeling of Advection-Diffusion-Reaction Equations:Pattern Formation Under Uniform Differential Advection显示文摘A lattice Boltzmann model for the study of advection-diffusion-reaction(ADR)problems is proposed.Via multiscale expansion analysis,we derive from the LB model the resulting macroscopic equations.It is shown that a linear equilibrium distribution is sufficient to produce ADR equations within error terms of the order of the Mach number squared.Furthermore,we study spatially varying structures arising from the interaction of advective transport with a cubic autocatalytic reaction-diffusion process under an imposed uniform flow.While advecting all the present species leads to trivial translation of the Turing patterns,differential advection leads to flow induced instability characterized with traveling stripes with a velocity dependent wave vector parallel to the flow direction.Predictions from a linear stability analysis of the model equations are found to be in line with these observations. | S.G.Ayodele D.Raabe F.Varnik | 2013 | Communications in Computational Physics2013，13，3： | 0 |
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