泡沫铝夹心结构不同温度及疲劳荷载下的力学性能与结构优化实验研究

项目名称： 泡沫铝夹心结构不同温度及疲劳荷载下的力学性能与结构优化实验研究

项目编号： No.11272090

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 杨福俊

作者单位： 东南大学

项目金额： 96万元

中文摘要： 泡沫铝夹心结构除具备优异功能材料特性外，还具有很高的能量耗散力，抗冲击强度和耐热能力等，在航空航天、军事和民用等领域具有广泛的应用前景。然而，目前实验和理论方面对其结构与力学性能的研究与评价还不完善。本项目拟采用包括红外成像及图像处理技术等手段观测多孔铝夹心结构不同温度，疲劳荷载下变形行为特征，能量吸收及结构失效过程与破坏模式，研究其细观非均匀性及材料几何/物理参数的变化与宏观力学性能之间的关系；结合理论分析与数值模拟建立不同温度下泡沫铝夹心结构的承载、吸能与结构构型和参数间的关系，以具有优异刚度、强度和良好抗冲击吸能性能为研究目标，对结构的几何参数、力学性能参数进行优化设计，为泡沫铝夹心结构的多学科优化设计以及抗冲击防护评估等方面提供技术支持，满足空天飞行器、高速轨道车辆、舰船等对超轻材料与结构的需求。本项目的研究还能促进实验力学等相关基础学科的研究与发展，具有重要的理论与实际意义。

中文关键词： 泡沫铝夹心结构；静动态弯曲响应；优化设计；温度变化；非线性振动

英文摘要： As specific material properties, Aluminium Foam Sandwich(AFS) panels have a wide range of potential applications such as aerospace, military and engineering applications, due to its excellent energy dissipation, high impact strength, higher working temperature and thermal insulation. However, the existing research work on AFS panels has not enough for better describing the relation between its mechanical behaviors and its structure. In the proposed project, the techniques, such as thermal imaging and digital image processing will be employed to investigate the deformation responses, energy absorption, failure modes and damage involution of AFS panels under different temperature field and dynamical loading. The correlation of the mechanical properties of AFS panels with their physical and geometric properties will be studied. By using of analytical solution and numerical simulation, it will characterize the impact loading and energy absorption of AFS with its structural response under different temperature field and loading. The goal of the proposed research is to investigate and design AFS panels with high specific stiffness and strength, excellent plastic energy absorbing capabilities, and it will be achieved by optimizing different parameters, such as materials of core and face sheets or design geometry of pan

英文关键词： Aluminum Foam Sandwich；flexural response under static and dynamic loading；Optimum Design；Elevated temperature；non-linear vibrating