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Non-destructive examination (NDE) of composite to steel joints for in-build and through life condition monitoring in the marine environment.

复合材料与钢接头的无损检测 (NDE)，用于海洋环境中的内置和全寿命状态监测。

基本信息

批准号：
1786410
负责人：
金额：
--
依托单位：
University of Southampton
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2016
资助国家：
英国
起止时间：
2016 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=studentship-1786410
关键词：
Non destructive examination NDE composite

项目摘要

A number of composite to steel joint geometries have been developed for use in ship structures to enable, for example, incorporation of large composite superstructures onto steel hulls. In practice, these joints could be up to 100m or more in length. The ability to ascertain the condition of such joints both at build and through the vessel life is critical to the adoption of composite structures in such hybrid arrangements.Some joint geometries are amenable to inspection by existing techniques such as thermography or ultrasonic inspection. These typically consist of composite material overlaying a steel substrate. Higher joint strengths have been achieved using geometries where the composite part is bonded into a steel channel and externally over-laminated. These geometries have proved to be incompatible with established non-destructive examination techniques.The project seeks to identify and develop a method of validating the integrity of a composite to steel joint both at build and through life where the joint includes bond surfaces masked from conventional non-destructive examination (NDE) methods by a steel component. The method developed will be practical for use in an industrial environment including on external ship surfaces.The project offers an opportunity to develop current state of the art non-destructive evaluation technologies to reveal hitherto hidden defects. The project will address the feasibility of applying novel infra-red/UT approaches to such geometries and establish their usefulness particularly in the construction stage. To reveal the hidden defects a novel sensor system must be developed. A system based on embedded sensors/actuators will be explored to probe deep into the structure and assess any degradation of the joint. It is essential that such a system has minimum impact on the joint integrity and a key part of the project will be to establish the failure envelop of joints with and without the integrated system.The successful candidate for the PhD will ideally have a strong background in mechanics of composite material and be aware of techniques that are currently in used for condition monitoring and NDE on in service structures such as ships, aircraft, bridges and off-shore structure.

已经开发了许多复合材料与钢的连接几何结构，用于船舶结构，例如，能够将大型复合材料上层建筑结合到钢船体上。在实践中，这些接头的长度可以达到100米或更长。在这种混合布置中采用复合材料结构的关键是能够在建造时和整个容器寿命期间确定此类接头的状况。一些接头几何形状可以通过现有技术进行检测，例如热像仪或超声波检测。这些材料通常由覆盖在钢衬底上的复合材料组成。更高的连接强度已经获得使用的几何结构，其中的复合材料部分被粘结到一个钢通道和外部覆盖层压。这些几何形状已被证明与现有的无损检测技术不相容。该项目旨在识别和开发一种方法，以验证复合材料与钢的接头在建造时和整个生命周期中的完整性，其中接头包括由钢部件掩盖的传统无损检测(NDE)方法的粘合面。开发的方法将在工业环境中使用，包括在外部舰船表面。该项目提供了一个机会，以发展目前最先进的无损评估技术，以揭示迄今隐藏的缺陷。该项目将探讨将新的红外线/UT方法应用于这种几何形状的可行性，并确定其实用性，特别是在施工阶段。为了发现隐藏的缺陷，必须开发一种新型的传感器系统。将探索一种基于嵌入式传感器/执行器的系统，以深入探测结构并评估关节的任何退化。这样的系统对节点完整性的影响最小是至关重要的，该项目的一个关键部分将是建立有或没有集成系统的节点的失效包络。成功获得博士学位的候选人最好具有复合材料力学方面的强大背景，并了解目前在船舶、飞机、桥梁和离岸结构等服务结构上用于状态监测和无损检测的技术。