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| 1 | 智能软材料热-电-化-力学耦合问题的研究进展显示文摘评述了聚合物胶体、水凝胶以及关节软骨等典型智能软材料的多场耦合力学问题的国内外研究现状,重点讨论了这类智能软材料以化学扩散为特征的热-电-化-力学耦合的基本理论和研究方法.详细介绍了具有代表性的国内外主要研究团体的研究进展.阐述了基于热力学理论和哈密顿原理所建立的一般性热-电-化-力学多场耦合理论框架.作为典型特例,针对等温过程的化学-力学耦合的本构关系和控制方程,证明了化学-力学耦合理论架构的封闭性.建立了化学-力学耦合系统的有限元列式,得到了一维化学-力学耦合问题的解析解,并通过数值算例分析了水凝胶和关节软骨的多场耦合作用.最后,展望了智能软材料多场耦合问题的未来研究重点和发展趋势. | 杨庆生 魏巍 马连华 | 2014 | 力学进展2014，44，1： | 8 |
| 2 | Study on the Microscopic Network Model of PVA Hydrogel Based on the Tensile Behavior显示文摘Hydrogel is an emerging material widely used in the biological field.The tensile properties of hydrogel mainly depend on its polymer network,but due to the complex microstructure of the network,some properties of the hydrogel have yet to be qua nt itatively analyzed.In this article,we built a three-dimensional random fiber net work to characterize the micros tructure of a hydrogel.The fibers were simplified as elastic beams,and the cross-links were regarded as'hinges.'Combined with the macroscopic experimental results,the influence of the change of fiber length and the relationship between the polymer content and the cross-link density were studied.The model was verified by the quasi-static tensile test results of real PVA hydrogel materials with different fiber contents.The results show that the model can well match the tensile stress-strain curve and tensile strength of the PVA hydrogels with different fiber contents.The change in micros true ture of the fiber network induces nonlinear behaviors,and although the cross-link number increases with the increase in polymer content,the cross-link density(per unit PVA chain length)of the PVA hydrogel slightly decreases as the content increases. | Kejia Xu Liqun Tang Yongrou Zhang Rong Ding Xinyuan Wang Dafei Huang Jiansheng Lin | 2019 | Acta Mechanica Solida Sinica2019，32，5： | 1 |
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