Structural Health Monitoring for Advanced Composite Structures: A Review

Abstract

Condition-based maintenance refers to the installation of permanent sensors on a structure/system. By means of early fault detection, severe damage can be avoided, allowing efficient timing of maintenance works and avoiding unnecessary inspections at the same time. These are the goals for structural health monitoring (SHM). The changes caused by incipient damage on raw data collected by sensors are quite small, and are usually contaminated by noise and varying environmental factors, so the algorithms used to extract information from sensor data need to focus on sensitive damage features. The developments of SHM techniques over the last 20 years have been more related to algorithm improvements than to sensor progress, which essentially have been maintained without major conceptual changes (with regards to accelerometers, piezoelectric wafers, and fiber optic sensors). The main different SHM systems (vibration methods, strain-based fiber optics methods, guided waves, acoustic emission, and nanoparticle-doped resins) are reviewed, and the main issues to be solved are identified. Reliability is the key question, and can only be demonstrated through a probability of detection (POD) analysis. Attention has only been paid to this issue over the last ten years, but now it is a growing trend. Simulation of the SHM system is needed in order to reduce the number of experiments.

Reliability of multi-purpose offshore-facilities: Present status and future direction in Australia

“…glass and carbon fibres, aramid and basalt fibres and natural fibres) reinforced polyester and epoxy adhesive as specified in DNVGL-ST-0376 and IEC61400-23 standards ( Mishnaevsky et al, 2017 ). Review of the SHM techniques in the monitoring of composite structures and specifically for wind turbine blades can be found in the works of Güemes et al (2020) and Schubel et al (2013) respectively. The materials used in offshore wave energy converters mostly include steel, the selection of which follows the same standards for other floating offshore structures such as OWT.…”

Наноиндентирование И Механические Свойства Материалов В Субмикро- И Наношкале. Недавние Результаты И Достижения (О Б З О Р)

“…Кроме традиционных задач материаловедения (обеспечение сочетания высоких уровней удельной прочности и трещиностойкости, предотвращение деградации структуры и свойств в условиях эксплуатации), создание высокопрочных армированных полимерных композитов требует решения и специфических проблем, связанных с анизотропией их структуры и свойств, большим их различием у отдельных компонентов и физико-химическими особенностями их взаимодействия. Необходимо определение механических характеристик матрицы и волокон порознь, степени их адгезии друг к другу, атомной структуры и характера химических связей в интерфейсах, выяснение доминирующих механизмов пластической деформации и разрушения вдоль и поперек направления укладки волокон [209,210,[215][216][217][218].…”

Fiber Bragg Sensors Embedded in Cast Aluminum Parts: Axial Strain and Temperature Response

“…Monitoring of functional parts is of great interest and could help to improve the lifetime of these parts or to avoid failures in advance [ 1 , 2 ]. In the field of aerospace, embedded fiber optic sensors have been used as a real-time monitoring system in an aircraft with single-point, multi-point, or distributed sensors [ 3 , 4 , 5 , 6 ].…”