Analysis, Manufacturing, and Mechanical Testing of Stitched Sandwich Composites

缝合夹层复合材料的分析、制造和机械测试

• 批准号: 0621696
• 负责人: Valeria LaSaponara
• 金额: --
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-10-31 至 2008-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0621696&HistoricalAwards=false
• 关键词: Analysis; Manufacturing; Mechanical; Testing; Stitched

Analysis, Manufacturing, and Mechanical Testing ofStitched Sandwich CompositesAbstractThe team from the University of Utah and Georgia Tech will conduct an integrated analytical, manufacturing, and experimental investigation of the fundamental mechanical behavior of stitched sandwich composites with through-thickness reinforcement in their foam core. The proposed research program will enhance the knowledge and understanding of the mechanical and damage responses including creep and other time-dependent behavior. To that end, research is proposed in three major areas:Manufacturing: Development of non-normal stitching concepts for sandwich structures will be investigated under a variety of multi-axial loadings, including bi-axial and pure interlaminar shear. Stitching for enhanced compression behavior will be investigated by optimizing the characteristics of perforated stitched sandwich structures.Analytical and Computational: Multi-scale micromechanical and structural models will be developed to simulate the mechanical behavior of stitched sandwich composites with emphasis on both short-term and long-term time-dependent responses. Different finite-element structural modeling approaches, using shell, continuum, and cohesive fracture elements, will be used to simulate the material and structural responses including time-dependent and damage growth.Experimental: Standard and non-standard test procedures will be developed and performed to examine the mechanical behavior of stitched sandwich composites and structural components under combined mechanical and environmental conditions.The proposed inter-university collaboration between the three PIs and their graduate and undergraduate students will ultimately promote and enhance the research and educational infrastructure at both sides. The composite education and research center CERC at Georgia Tech will be part of the proposed activity. Its students and other faculty will tremendously benefit from enhancing its capability in the area of sandwich composites. Undergraduate and graduate students from underrepresented groups will be part of this new research project. The authors are planning to host conference sessions and a summer workshop on using sandwich composites for practicing engineers in the areas of automotive, aerospace and civil infrastructure. The educational activity on sandwich composites, based on this research, will be integrated in two composite courses at the undergraduate and graduate levels. The web will be also used to produce an educational module for design of sandwich composites.

分析，制造和机械测试OFSTITCHED SANDWICH COPSITESITESATTRATE TREACTHTHE团队从犹他大学和佐治亚理工学院将对缝线夹层复合材料的基本机械行为进行综合分析，制造和实验研究，并在其泡沫核心中具有整个剂量的增强性。拟议的研究计划将增强对机械和损害反应（包括蠕变和其他时间依赖性行为）的知识和理解。为此，在三个主要领域提出了研究：制造业：将在各种多轴负载下（包括双轴和纯层间剪切）研究，为三明治结构的非正常缝合概念的发展。将通过优化穿孔缝合三明治结构的特性来研究增强压缩行为的缝线。分析和计算：将开发多尺度的微机械和结构模型，以模拟缝合三明治复合材料的机械行为，并强调短期和长期时间依赖时间依赖性依赖性响应。使用壳，连续性和凝聚力的断裂元素，将使用不同的有限元元素结构建模方法来模拟材料和结构响应，包括时间依赖时间和损害的增长。实验：标准和非标准的测试程序将被开发和执行，以在固定的夹心组合中进行机械组合的机械性能，以固定的机械性和结构性策略，以固定的机制和结构性的态度，以构成固定的机制和结构性构造。他们的毕业生和本科生将最终在双方促进和增强研究和教育基础设施。佐治亚理工学院的CERC综合教育与研究中心将成为拟议活动的一部分。它的学生和其他教职员工将从提高其在三明治复合材料领域的能力中受益匪浅。来自代表性不足的小组的本科生和研究生将成为该新研究项目的一部分。作者计划在汽车，航空基础设施和民用基础设施领域内使用三明治复合材料进行夏季会议和夏季研讨会。基于这项研究的三明治复合材料的教育活动将在本科和研究生一级的两个综合课程中纳入。该网络还将用于生产用于设计三明治复合材料的教育模块。