A modelling technique to investigate the effects of quasi-static loads on guided-wave based structural health monitoring systems

被引：18
作者：
Perfetto, Donato [1 ]
Lamanna, Giuseppe [1 ]
Petrone, Giuseppe [2 ]
De Fenza, Angelo [3 ]
De Luca, Alessandro [1 ]
机构：
[1] Univ Campania L Vanvitelli, Dept Engn, Via Roma 29, I-81031 Aversa, Italy
[2] Univ Naples Federico II, Dept Ind Engn, Aerosp Div, Via Claudio 21, I-80125 Naples, Italy
[3] CIRA Italian Aerosp Res Ctr, Syst Engn & Technol Integrat Dept, Reentry Space Syst Sect, Via Maiorise, I-81043 Capua, Italy
来源：
FORCES IN MECHANICS | 2022年 / 9卷
关键词：
Structural health monitoring; Finite element analysis; Modelling; Experiments; Load effect; DAMAGE DETECTION; LAMB WAVES; PROPAGATION; IMPACT;
D O I：
10.1016/j.finmec.2022.100125
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Guided wave-based methods for damage detection have been widely investigated as techniques to identify damages and their dimensions in structures. Most of the research activities presented in literature have been performed focusing on simple case studies in a laboratory environment, whereas Structural Health Monitoring systems should be investigated under operational loading conditions. When subjected to an operational load, propagation mechanisms can change, suffering from the interaction between propagating signal and scattered waves due to an initial stress-strain state, and so leading to errors in damage sites estimation. In this work, a numerical model, based on Finite Element approach, is proposed to investigate the effects of an initial stressstrain state, induced by a quasi-static load, on guided-wave propagation mechanisms. The case study consists of a real structure, a blended winglet of a general aviation aircraft. The methodology was assessed with reference to different scenarios.
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页数：17
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