A New Methodology for Structural Health Monitoring Applications

Medeiros, Ricardo de; Lopes, H.; Guedes, Rui Miranda; Vaz, Mário; Vandepitte, Dirk; Tita, Volnei

doi:10.1016/j.proeng.2015.08.036

Cited by 13 publications

(16 citation statements)

References 25 publications

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“…A new damage metric and a Frequency Response Functions (FRF) based method are used to identify damage in a first approach and an optical interferometric technique locates and quantifies the extent of damage in the structure. Additionally, De Medeiros et al [17] proposed a new damage metric taking into account not only the amplitude, but also the phase of the FRF. The new metric was compared with other ones and experimental data, concluding that vibration-based metrics are a good option not only to identify the damage, but also to provide a prediction of the damage severity [18].…”

Section: Introductionmentioning

confidence: 99%

Dynamic response of laminated composites using design of experiments: An experimental and numerical study

Souza

Vandepitte

Tita

et al. 2019

Mechanical Systems and Signal Processing

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In addition to many advantages, composite materials constitute a new challenge in many industrial fields and applications. Vibration Based Methods (VBM) are relatively simple and at low cost to detect damage and fails in composite structures, but they are sensitive to variations in geometry and material properties. Recently, the main challenge in VBM is to establish a robust process to be applied on an industrial environment. In this work, a methodology to identify the effect of design parameters on the dynamic response of laminated composite plates is presented. For the case of composite materials, the production process plays an important role. Numerical dynamic analyses are run using the Finite Element code ABAQUS TM , which is complemented with user subroutines written in Fortran and Python. A Design of Experiments (DoE) strategy is developed to reduce the number of experiments and to evaluate the effect of the design parameters. In this work, two sets of composite plates were evaluated, [0] 8 and [0/-15/15/0/-15/15] s , with natural frequencies used as response quantities. In addition, Frequency Response Functions are analysed, as they are obtained by a full factorial design. Afterwards, the results are discussed with proper attention for the potential and for the limitations of the proposed methodology from the perspective of usage to detect damage and failure in composite structures.

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Section: Introductionmentioning

confidence: 99%

Dynamic response of laminated composites using design of experiments: An experimental and numerical study

Souza

Vandepitte

Tita

et al. 2019

Mechanical Systems and Signal Processing

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“…De Medeiros and colleagues 41–44 proposed a new damage metric to determine the influence of the damage in the free–free vibration response. Different measurements can be used to determine the FRF, such as acceleration/force, velocity/force, displacement/force, strain/force and PZT sensor voltage/PZT excitation voltage.…”

Section: Shm For Impact Damaged Composite: a New Methodologymentioning

confidence: 99%

Structural health monitoring for impact damaged composite: a new methodology based on a combination of techniques

Medeiros

Vandepitte

Tita

2017

Structural Health Monitoring

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Advanced aerospace materials, including fibre-reinforced polymer and ceramic matrix composites, are increasingly being used in critical and demanding applications, challenging not only the current damage prediction, detection and quantification methodologies, but also the residual life of the structure. The main objective of this work consists of developing a new methodology based on different techniques to be applied on structural health monitoring system for impacted composite aeronautic structures. For this, it is necessary to identify, and to localise damage, as well as to calculate the severity of the damage and to predict the residual strength of the composite structure. To achieve these goals, the research methodology should consider three methods: (1) vibration-based method, (2) shearography speckle and (3) flexural after impact. Composite plates, made of epoxy resin reinforced by carbon fibre, are evaluated. First, vibration-based method provides frequency response functions to be analysed by a new metric, which is compared in terms of their capability for damage identification and global location. Afterwards, the extension of impact damage is determined using shearography speckle. This technique has demonstrated great potential for damage detection in composite-laminated structures. A flexure after impact test is used to evaluate its limitations and potentialities as a damage-tolerance technique. The residual flexural strength of damaged specimens is evaluated by quasi-static four-point bending test. A new criterion based on a relationship between damage metric from vibration-based method and flexure after impact analysis is presented and discussed. Finally, it discussed the advantages and limitations of this combination of techniques into the context of structural health monitoring systems.

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“…Then, equation ( 31) can be applied to find the eignstresses in all failed elements due to damage. Using equations ( 9), (12), and ( 13), laminate mid plane strain due to the current damage state can be evaluated, which represents the "thermal" strains to be applied back on the structure element. ABAQUS will update the structure element strains and stresses to account for the additional "thermal" strains and re-check for more failure at same load level until damage saturation is attained.…”

Section: Processing Stagementioning

confidence: 99%

“…Rearranging the terms that contain the unknown eignstresses and solving equation (31), the eignstresses in all elements in all plies that exhibit failure can be obtained. The laminate eignstresses f 0 can be obtained using equations ( 7) and ( 13) and therefore the laminate overall strain ε o is available using equation (12).…”

Section: Damage Criteriamentioning

confidence: 99%

Implementation of multiscale mechanisms in finite element analysis of active composite structures

Micheal

Bahei–El–Din

2022

Journal of Composite Materials

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Interrogation of composite structures for inherent damage is investigated implementing three-tier analysis scheme. The analysis starts at the structure level where a general-purpose Finite Element code ABAQUS is employed to obtain the stress field in the second level of analysis that is the composite laminate. A special material routine is prepared to propagate the local fields to the individual plies and hence to the third level of analysis which is the microstructure modelling of the composite. Through the third level of analysis, interface damage between fiber and matrix is checked implementing a certain failure criteria. The interaction between the different length scales; that are, structure, macro, and micro scales, is implemented using the non-mechanical strains caused by damage. Embedment of electrically active fibers in the laminate serves as a tool to interrogate the structure for inherent damage through the electric displacement generated due to the electro-mechanical coupling. To verify the developed multi-scale model, a comparison with the experimental results of a tube problem under combined internal pressure and axial load is presented. The results show good agreement in both the undamaged and damaged state. As an application, a plate with a hole under biaxial load is solved. The output includes not only the structure global behavior during damage but also detailed information about the location of damage within the structure, the plies that exhibit damage, type of damage and the fiber/matrix debonded length. Comparison between the electric displacement of the active fibers in the undamaged and damaged states is presented as well.

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A New Methodology for Structural Health Monitoring Applications

Cited by 13 publications

References 25 publications

Dynamic response of laminated composites using design of experiments: An experimental and numerical study

Dynamic response of laminated composites using design of experiments: An experimental and numerical study

Structural health monitoring for impact damaged composite: a new methodology based on a combination of techniques

Implementation of multiscale mechanisms in finite element analysis of active composite structures

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