• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Composite Structures >Numerical and experimental investigation into the behaviour of strengthened hollow box beams made of unidirectional fibre-reinforced IPC matrix composite
【24h】

Numerical and experimental investigation into the behaviour of strengthened hollow box beams made of unidirectional fibre-reinforced IPC matrix composite

机译：单向纤维增强IPC基复合材料增强空心箱梁性能的数值和实验研究

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

The development of composite materials is a major issue in sustainable construction regarding the exhaustion of natural resources. The environmental impact of concrete favours the development of alternative solutions such as inorganic phosphate cement (IPC) matrix composite, which presents significant advantages. The manufacturing of unidirectional glass-fibre-reinforced IPC matrix composite by pultrusion shows shear weaknesses, leading to premature failure of load-bearing elements under shear effects. Thus, composite beams are strengthened by braiding and circumferential wrapping to increase their load-carrying capacity by bridging shear cracks. Nevertheless, the optimization of the strengthening and the later development of design rules targeting engineers involve the identification of dimensioning parameters. To bridge quantitative and qualitative analyses of the bending behaviour of strengthened beams, we propose here the use of a 3D finite element model and experimental data. The strengthening enhancement is discussed, and the numerical model is validated at the global scale. The bending stiffness and the failure are well predicted for ultimate and serviceability limit states. The braiding brings additional stiffness regardless of the characteristics of braiding, but the fibre volume ratio and the nature of the fibres (glass or carbon) have a significant influence on the failure load. At the local scale, the numerical results diverge from the experimental ones. A more detailed analysis of the local damaging phenomena is necessary. (C) 2016 Elsevier Ltd. All rights reserved.
机译：复合材料的开发是可持续建筑中自然资源枯竭的主要问题。混凝土对环境的影响有利于开发替代解决方案，例如无机磷酸盐水泥（IPC）基复合材料，这具有明显的优势。通过拉挤成型制造单向玻璃纤维增​​强IPC基复合材料显示出剪切弱点，导致在剪切作用下承重元件过早失效。因此，复合梁通过编织和周向包裹得到加强，以通过弥合剪切裂缝来增加其承载能力。然而，针对工程师的设计规则的强化和后续开发的优化涉及尺寸参数的识别。为了架桥对加固梁的弯曲行为进行定量和定性分析，我们在此建议使用3D有限元模型和实验数据。讨论了增强的增强，并在全球范围内验证了数值模型。对于极限和使用极限状态，可以很好地预测弯曲刚度和破坏。不管编织的特性如何，编织都会带来额外的刚度，但是纤维的体积比和纤维（玻璃或碳）的性质对破坏载荷有重要影响。在局部范围内，数值结果与实验结果不同。有必要对局部破坏现象进行更详细的分析。 （C）2016 Elsevier Ltd.保留所有权利。

著录项

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