具有生长特性的板壳状软材料样品不仅在自然界广泛存在，而且拥有广阔的工程应用前景，因此在力学、生物、工程等领域引起了极大的研究兴趣。在生长过程中，软材料样品往往展现出复杂的形貌演化，其内在力学机理涉及样品的构型不稳定性、内部残余应力、屈曲模态转化等诸多因素，具有很大的研究难度。本项目将通过理论分析、数值模拟和实验验证等方法，对板壳状软材料样品的生长变形进行系统研究。研究内容包括：(1)基于非线性弹性力学框架建立包含生长函数的新型有限应变板壳理论；(2)对具有理想构型的软材料样品，通过解析方法对板壳方程进行求解，深入分析样品构型在大变形情况下的不稳定性；(3)设计新型板壳单元，对具有生物和工程背景的软材料样品在生长过程中的复杂力学行为进行数值模拟；(4)开展实验研究，对理论分析和数值模拟的结果进行验证。本项目的研究成果不仅具有重要的学术价值，同时也将为软材料智能器件的设计开发奠定基础。

The plate- and shell-shaped soft material samples with growth property not only exist widely in nature, but also have broad prospects for engineering applications. Therefore, great research interests on this subject have been motivated in the fields of mechanics, biology, engineering, etc. During the growth processes, the soft material samples usually exhibit complex morphological evolutions. The corresponding mechanical mechanisms involve the configurational instability, the internal residual stress, the bulking mode transformation and many other factors, which are very difficult to be studied. In this project, the growth deformations of plate- and shell-shaped soft material samples will be investigated systematically through the approaches of theoretical analyses, numerical simulations and experimental verifications. The research contents include: (1) establish novel finite-strain plate and shell theories based on the framework of nonlinear elasticity, with the growth functions being taken into account; (2) for soft material samples with idealized configurations, the plate or shell equations will be solved by using analytical methods, and the instabilities of the sample configurations under large deformations will be further analyzed; (3) design new types of plate and shell elements, and simulate the complex mechanical behaviors of soft material samples with biological and engineering backgrounds during the growth processes; (4) carry out experimental research and verify the results of theoretical analyses and numerical simulations. The results obtained from the current project will have important academic values. Besides that, these reaults will also lay the foundation for the design and development of intelligent soft material devices.