• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Composite Structures >Novel progressive failure model for quasi-orthotropic pultruded FRP structures: Application to compact tension and web-crippling case studies (Part Ⅱ)
【24h】

Novel progressive failure model for quasi-orthotropic pultruded FRP structures: Application to compact tension and web-crippling case studies (Part Ⅱ)

机译：准正交草莓FRP结构的新型渐进式故障模型：紧凑型张力和网状型案例研究的应用（Ⅱ）

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

Part I [1] of this two-part paper presented the formulation of a novel progressive failure model for pultruded fibre reinforced polymer (FRP) composites, allowing for the 3D simulation of quasi-orthotropic FRP plates as a homogenized material, as well as the model calibration based on a set of standardized material characterization tests. Part II presents the application of that (calibrated) model to the simulation of two case studies: (i) transverse compact tensile (CT) tests; and (ii) web-crippling tests for two load configurations, external two-flanges (ETF) and internal two-flanges (ITF). The CT test, which is often used to determine the (tensile) fracture energy of FRP materials, is especially interesting as it allows assessing the quality of the simulations for a combination of in-plane transverse tensile and shear stresses in a geometry with a sharp singularity. The webcrippling test, on the other hand, is often used to determine the strength of FRP shapes under concentrated transverse loads, a real structural problem involving combined in-plane compressive and shear stresses. In this paper these two relatively complex case studies are used to assess the quality of the simulation in the presence of combined in-plane stresses. The numerical results showed an excellent agreement with their CT test counterparts; the simulation of these experiments were also used to demonstrate the need for using a mesh regularization scheme when modelling problems with singularities. The models were also well able to simulate both web-crippling load configurations, only slightly underestimating the maximum load - this was likely due to the slight underestimation of shear strength for combined in-plane shear and moderate transverse compressive stresses, as discussed in Part I [1], and/or non-quasi-orthotropic behaviour of the web-flange junction. Overall, the numerical results showed a good agreement with the experimental data, even for relatively coarse meshes, attesting the feasibility and precision of the proposed damage progression model.
机译：该两部分纸的第I部分[1]介绍了针刺纤维增强聚合物（FRP）复合材料的新型渐进式失效模型，允许将准正向FRP板的3D模拟作为均匀材料，以及基于一组标准化材料表征测试的模型校准。第II部分呈现该（校准的）模型在模拟两种情况下的应用：（i）横向紧凑拉伸（CT）试验; （ii）用于两个负载配置，外部双法兰（ETF）和内部双法兰（ITF）的Web跨性测试。通常用于确定FRP材料的（拉伸）裂缝能量的CT试验特别有趣，因为它允许评估模拟的模拟质量，以便在具有尖锐的几何形状中的面内横向拉伸和剪切应力的组合奇点。另一方面，Webcrippling测试通常用于确定浓缩横向载荷下FRP形状的强度，涉及组合在面内压缩和剪切应力的实际结构问题。在本文中，这两个相对复杂的案例研究用于评估在发生在线组合的面内应力的情况下模拟的质量。数值结果表明，与其CT测试对应物的一致意见;这些实验的模拟还用于在用奇点建模问题时展示在使用网格正则化方案的情况。该模型也能模拟Web - 白垩载载荷配置，仅略微低估最大负载 - 这可能是由于在平面内剪切和适度的横向压缩应力的剪切强度轻微低估，如第I部分所讨论的那样[1]，和/或网凸缘结的非准二滴定行为。总体而言，数值结果表明，即使对于相对粗糙的网格，数值结果也与实验数据吻合良好，证明了所提出的损坏进展模型的可行性和精度。

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