• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Simulation Based Optimization of Complex Monolithic Composite Structures Using Cellular Core Technology.
【24h】

Simulation Based Optimization of Complex Monolithic Composite Structures Using Cellular Core Technology.

机译：使用单元核心技术的基于仿真的复杂整体复合结构优化。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Cellular core tooling is a new technology which has the capability to manufacture complex integrated monolithic composite structures. This novel tooling method utilizes thermoplastic cellular cores as inner tooling. The semi-rigid nature of the cellular cores makes them convenient for lay-up, and under autoclave temperature and pressure they soften and expand providing uniform compaction on all surfaces including internal features such as ribs and spar tubes. This process has the capability of developing fully optimized aerospace structures by reducing or eliminating assembly using fasteners or bonded joints. The technology is studied in the context of evaluating its capabilities, advantages, and limitations in developing high quality structures. The complex nature of these parts has led to development of a model using the Finite Element Analysis (FEA) software Abaqus and the plug-in COMPRO Common Component Architecture (CCA) provided by Convergent Manufacturing Technologies. This model utilizes a "virtual autoclave" technique to simulate temperature profiles, resin flow paths, and ultimately deformation from residual stress. A model has been developed simulating the temperature profile during curing of composite parts made with the cellular core technology. While modeling of composites has been performed in the past, this project will look to take this existing knowledge and apply it to this new manufacturing method capable of building more complex parts and develop a model designed specifically for building large, complex components with a high degree of accuracy. The model development has been carried out in conjunction with experimental validation. A double box beam structure was chosen for analysis to determine the effects of the technology on internal ribs and joints. Double box beams were manufactured and sectioned into T-joints for characterization. Mechanical behavior of T-joints was performed using the T-joint pull-off test and compared to traditional tooling methods. Components made with the cellular core tooling method showed an improved strength at the joints. It is expected that this knowledge will help optimize the processing of complex, integrated structures and benefit applications in aerospace where lighter, structurally efficient components would be advantageous.
机译：蜂窝芯工具是一种能够制造复杂的集成单片复合结构的新技术。这种新颖的加工方法利用热塑性蜂窝状芯子作为内部加工工具。蜂窝状芯体的半刚性特性使其易于叠置，并且在高压灭菌器的温度和压力下它们会软化并膨胀，从而在包括内部特征（如肋骨和翼梁管）在内的所有表面上提供均匀的压实。通过减少或消除使用紧固件或粘合接头的组装，该过程具有开发完全优化的航空航天结构的能力。在评估技术的能力，优势和开发高质量结构的局限性的背景下研究了该技术。这些零件的复杂性导致使用有限元分析（FEA）软件Abaqus和Convergent Manufacturing Technologies提供的插件COMPRO通用组件体系结构（CCA）开发模型。该模型利用“虚拟高压釜”技术来模拟温度曲线，树脂流动路径以及最终因残余应力而变形。已经开发了一个模型，该模型可以模拟使用蜂窝芯技术制造的复合零件固化过程中的温度曲线。尽管过去已经进行了复合材料的建模，但是该项目将寻求利用现有知识并将其应用于能够构建更复杂零件的这种新制造方法，并开发专门设计用于高度构建大型复杂组件的模型。准确性。模型开发已与实验验证结合进行。选择双箱梁结构进行分析，以确定该技术对内部肋骨和接缝的影响​​。制造双箱形梁并将其切成T形接头以进行表征。 T型接头的机械性能使用T型接头拉拔试验进行了测试，并与传统的加工方法进行了比较。用蜂窝芯工具方法制成的组件在接头处显示出更高的强度。预计该知识将有助于优化复杂，集成结构的处理，并有益于航空航天中较轻，结构高效的组件将是有利的应用。

著录项

  • 作者

    Hickmott, Curtis W.;

  • 作者单位

    University of Washington.;

  • 授予单位 University of Washington.;
  • 学科 Materials science.;Mechanical engineering.;Aerospace engineering.
  • 学位 Ph.D.
  • 年度 2015
  • 页码 166 p.
  • 总页数 166
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号