纤维素液晶材料的研究进展

文章介绍了纤维素液晶材料的结构、形成条件、性质及应用。     

甘蔗渣纤维素的再生和衍生化研究进展

文章主要从非均相和均相条件所制备的蔗渣纤维素材料进行归纳,较系统的介绍了甘蔗渣纤维素的再生和衍生化研究进展,并提出了发展的方向。     

Some implications of time reversal invariance in plasticity

It is postulated that, for dissipative processes, the work rate per unit volume is time-reversal invariant. This rule appears necessary and sufficient to allow a redefinition and extension of the rules of classical plasticity.     

Project begins on plasticity in brain structure

Studies on plasticity in brain structure and function, a flagship project of China's basic science research during the 1lth Five-year Plan period (2006-2010), has kicked off recently in Shanghai.     

Some extensions of elementary plasticity theory

A detailed investigation is presented of yield or loading criteria, for work hardening materials, which lead to constant strain ratios under increasing stress when stress ratios are maintained constant. The experimenter is given a choice of incremental stress-strain theories with which results of simple or complicated combined loading tests may be correlated. These theories are dealt with in order of increasing complexity and, at the same time, increasing capacity to represent experimentally established phenomena.The objective is the use of the mathematically simplest theory which will provide the desired flexibility in the analysis of experimental data.Loading functions of isotropic as well as anisotropic types are examined, among them those depending explicitly on stress alone and those depending on both stress and plastic strain. In the latter cases only those functions are investigated in which plastic strain appears to the first order. The predicted results of some basic tests are examined for several loading criteria.     

纤维素智能材料的研究进展

纤维素作为世界上最丰富的可再生资源,将纤维素功能化是人们研究的热点之一,文章综述了纤维素智能化的设计原理、纤维素智能材料的种类、智能化研究进展。