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: 0409514
• 负责人: Valeria LaSaponara
• 金额: $ 20万
• 依托单位: University of Utah
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-09-01 至 2006-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0409514&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.

缝合夹层复合材料的分析、制造和机械测试摘要来自犹他大学和佐治亚理工学院的团队将对泡沫芯中具有全厚度增强的缝合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。拟议的研究计划将增强对机械和损伤响应（包括蠕变和其他随时间变化的行为）的认识和理解。为此，提出了三个主要领域的研究： 制造：将在各种多轴载荷（包括双轴和纯层间剪切）下研究夹层结构非法向缝合概念的开发。将通过优化穿孔缝合夹层结构的特性来研究增强压缩行为的缝合。分析和计算：将开发多尺度微机械和结构模型来模拟缝合夹层复合材料的机械行为，重点是短期和长期-term 依赖于时间的反应。使用壳、连续体和粘性断裂单元的不同有限元结构建模方法将用于模拟材料和结构响应，包括时间依赖性和损伤增长。实验：将开发和执行标准和非标准测试程序研究缝合夹层复合材料和结构部件在机械和环境条件下的机械行为。三位 PI 及其研究生和本科生之间拟议的大学间合作将最终促进和加强双方的研究和教育基础设施。佐治亚理工学院的综合教育和研究中心 CERC 将成为拟议活动的一部分。其学生和其他教师将因增强其在夹层复合材料领域的能力而受益匪浅。来自代表性不足群体的本科生和研究生将成为这个新研究项目的一部分。作者计划为汽车、航空航天和民用基础设施领域的执业工程师举办关于使用夹层复合材料的会议和夏季研讨会。基于这项研究的三明治复合材料教育活动将被纳入本科生和研究生水平的两门复合材料课程中。该网络还将用于制作夹层复合材料设计的教育模块。