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首页> 外文期刊>Materials and structures >A magnetic method for non destructive monitoring of fiber dispersion and orientation in steel fiber reinforced cementitious composites. Part 2: Correlation to tensile fracture toughness
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A magnetic method for non destructive monitoring of fiber dispersion and orientation in steel fiber reinforced cementitious composites. Part 2: Correlation to tensile fracture toughness

机译：一种用于无损监测钢纤维增强水泥基复合材料中纤维分散和取向的磁性方法。第2部分：与拉伸断裂韧性的关系

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摘要

Successful application with advanced fiber reinforced cement based materials relies on reliable design prescriptions and design-oriented test methodologies for the identification of relevant material properties, together with consistent and effective quality control procedures. The "randomly uniform" dispersion of fibers within a structural element is a crucial issue to be tackled, which, if not achieved, may lead to the activation of unanticipated failure mechanisms, thus lowering the load bearing capacity and jeopardizing the structural performance. It is henceforth evident that non-destructive techniques for fiber dispersion monitoring need to be developed and calibrated, as it has been going on for at least the last lustrum, and their outcomes to be effectively correlated to the mechanical performance of the material. In this paper a non-destructive method based on the magnetic properties of the composite has been applied to monitor the fiber dispersion and orientation in HPFRCC slabs. The results have been correlated to the tensile behaviour, measured according to the newly conceived "Double Edge Wedge Splitting" technique. The work herein presented stands as a step towards the assessment of non-destructive methods for fiber dispersion monitoring and their inclusion into a sound quality control procedure in a design oriented perspective.
机译：先进的纤维增强水泥基材料的成功应用取决于可靠的设计规范和面向设计的测试方法，以识别相关的材料性能以及一致且有效的质量控制程序。纤维在结构元件中的“随机均匀”分散是要解决的关键问题，如果未能实现，则可能导致未预料到的破坏机理的激活，从而降低了承载能力并危及结构性能。显而易见，从现在开始，至少在最后一个讲台上，必须开发和校准用于纤维分散监测的非破坏性技术，并将其结果有效地与材料的机械性能相关联。在本文中，基于复合材料磁性能的非破坏性方法已应用于监测HPFRCC平板中的纤维分散和取向。结果与拉伸性能相关，该拉伸性能是根据新构想的“双边缘楔形劈裂”技术测量的。本文介绍的工作是朝着评估面向纤维的非破坏性方法评估纤维色散监测并将其纳入声音质量控制程序的一个步骤。

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