Some industrial applications for nanocomposites under mechanical and environmental loading

机械和环境载荷下纳米复合材料的一些工业应用

• 批准号: 446630013
• 负责人: Professor Dr.-Ing. Wilfried Becker
• 金额: --
• 依托单位: Fachgebiet Strukturmechanik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2020
• 资助国家: 德国
• 起止时间: 2019-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/446630013?language=en
• 关键词: Some; industrial; applications; nanocomposites; under

The main idea pursued in the project proposal is to continue investigations of the graphene or carbon nanotube placed over a polymer (metal, cement) matrix nanocomposites in the frame of 2D analytical stress-function variational method and to develop it for hygro-thermal-mechanical loading of nanocomposites and devices. Such results will be applied to estimate the influence of the environmental excitation on the interface behavior of some industrial devices. The Illustrative numerical examples will be presented in figures and discussed. Some parametric analysis will be done. The research objectives can be summarized as follows:Development of the 2D elastic problem for a representative volume element (RVE) of a nanocomposite device under thermal, moisture and mechanical loading. Derivation from the variational principle for a minimum of the complementary strain energy functional a 4th order ODE about axial stress of the graphene flake and presentation of all stresses in RVE as functions of the solution, its first and second derivatives. Under proper criterion the interface delamination will be found and discussed in detail, taking into account the influence of thermal and mechanical loading. Research and computational methodology• Under some idealizing assumptions all stresses (axial, shear and peel) of the chosen nanostructure under hygro-thermal-mechanical loading have to be expressed by one single stress potential function. The solution of the variational problem for minimization of complementary strain energy functional will lead to one ordinary differential equation of 4th order about the potential function.The solution of the boundary value problem for last equation must be found to determine and discuss all stresses in the layers.• The 2D stress function variational method will be applied to consider hygrothermalmechanical behaviour of some nanodevices, textile and cement nanocomposites to estimate the appearance of a possible interface delamination due to the excitation of combined loading.• Next, detailed studies and illustration in figures on the possible interface delamination, according to the chosen criterion has to be done. Further it is expected that some parametric analysis of the influence of the loading and geometric characteristics of the structure on the interface debond length will be investigated in details. The aid provided by the host institution with experimental data will also be valuable in this aspect.

项目提案中提出的主要思想是继续对位于聚合物（金属，水泥）基质纳米复合材料上的石墨烯或碳纳米管进行投资，以2D分析应力功能变化方法的框架进行开发，以开发用于纳米复合材料和纳米复合材料和deapices的水力器械加载。这些结果将应用于估计环境兴奋对某些工业设备界面行为的影响。插图数字示例将在图中列出并进行了讨论。将进行一些参数分析。研究目标可以总结如下：在热，水分和机械负载下，纳米复合设备的代表体积元素（RVE）的2D弹性问题的发展。从变异原理衍生的最低应变能函数a第四阶的ode od ode涉及石墨烯薄片的轴向应力以及RVE中所有应力的所有应力作为溶液的功能，即第一和第二个衍生物。在适当的标准下，将在热和机械负载的影响下详细发现界面分层。研究和计算方法论•在某些构想假设下，在卫生机械加载下所选纳米结构的所有应力（轴向，剪切和果皮）都必须由一个单个应力电位函数表达。 The solution of the variational problem For minimization of complete strain energy functional will lead to one ordinary differential equation of 4th order about the potential function.The solution of the boundary value problem for last equation must be found to determine and discuss all stresses in the layers.• The 2D stress function variational method will be applied to consider hygrothermalmechanical behaviour of some nanodevices, textile and cement nanocomposites to estimate the appearance of a possible interface •组合负载的激发。•接下来，根据所选标准，必须完成有关接口分层的详细研究和插图。此外，预计将对结构的负载和几何特征对界面DEBOND长度的影响的影响进行一些参数分析。主机机构提供的实验数据提供的援助也将在这方面有价值。