Strain-based Structural Health Monitoring of Complex Composite Structures
Strain-based Structural Health Monitoring of Complex Composite Structures
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DOI：
10.1177/1475921708090559
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发表时间：
2008-07
期刊：
影响因子：
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通讯作者：
A. Kesavan;S. John;I. Herszberg
中科院分区：
文献类型：
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作者：
A. Kesavan;S. John;I. Herszberg
在过去的几十年里，复合材料结构在工程应用中的应用已经激增，因为它具有明显的优势，即：高结构性能，耐腐蚀性和高强度/重量比。然而，它们也有一系列的缺点，即，它们容易导致纤维断裂、基体开裂和分层。这些类型的破坏通常是看不见的，如果不被发现，可能会导致结构的灾难性失效。虽然有检测这种损害的系统，但对损害的临界性评估和预测往往很难实现。本文讨论了所进行的研究，该研究导致了用于海洋结构的二维聚合物复合t形接头的结构健康监测（SHM）系统的开发。发现SHM系统不仅能够检测复合结构中存在的多个分层，而且能够确定t型接头结构中存在的所有分层的位置和程度，而不考虑作用在结构上的载荷（角度和大小）。该系统的开发依赖于对结构在工作载荷下的应变分布的检查。
The use of composite structures in engineering applications has proliferated over the past few decades due to its distinct advantages, namely: high structural performance, corrosion resistance, and high strength/weight ratio. However, they also come with a set of disadvantages, i.e., they are prone to fiber breakage, matrix cracking, and delaminations. These types of damage are often invisible and if undetected, could lead to catastrophic failures of structures. Although there are systems to detect such damage, the criticality assessment and prognosis of the damage is often much more difficult to achieve. This article discusses the research study conducted, which resulted in the development of a Structural Health Monitoring (SHM) system for a 2D polymeric composite T-joint, used in maritime structures. The SHM system was found to be capable of not only detecting the presence of multiple delaminations in a composite structure, but also capable of determining the location and extent of all the delaminations present in the T-joint structure, regardless of the load (angle and magnitude) acting on the structure. The system developed relies on the examination of the strain distribution of the structure under operational loading.