Nondestructive determination of local material properties of laminated composites with the impulse excitation technique

Niutta, Carlo Boursier; Tridello, Andrea; Belingardi, Giovanni; Paolino, Davide Salvatore

doi:10.1016/j.compstruct.2021.113607

Cited by 15 publications

(12 citation statements)

References 21 publications

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“…As such, the presence of localized damage, such as in impact events, can be more easily highlighted. Apart from the so-called “coin-tap” test where an operator locally impacts the component through a coin and listens to the resulting sound and whose pure subjectivity does not allow extensive use, an innovative methodology based on the Impulse Excitation Technique (IET) has been recently proposed [ 55 , 56 ].…”

Section: Vibrational Methodsmentioning

confidence: 99%

“…The resultant first resonant frequency is thus only a function of the elastic characteristics of the inspected region. Figure 3 , taken from [ 56 ], shows the results of a finite element modal analysis where simply supported ( Figure 3 b) and clamped ( Figure 3 c) boundaries are alternatively retained for the path of nodes highlighted in Figure 3 a. When fully clamped boundaries are adopted, a specific mode which involves only the inspected region can be excited.…”

Section: Vibrational Methodsmentioning

confidence: 99%

“… Comparison of local simply supported and clamped boundaries: ( a ) finite element model with highlighted path of constrained nodes; ( b ) modal analysis results with simply supported boundaries; ( c ) modal analysis results with clamped boundaries [ 55 , 56 ]. …”

Section: Figurementioning

confidence: 99%

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Residual Properties in Damaged Laminated Composites through Nondestructive Testing: A Review

et al. 2021

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The development of damage tolerance strategies in the design of composite structures constitutes a major challenge for the widespread application of composite materials. Damage tolerance approaches require a proper combination of material behavior description and nondestructive techniques. In contrast to metals, strength degradation approaches, i.e., the residual strength in presence of cracks, are not straightforwardly enforceable in composites. The nonhomogeneous nature of such materials gives rise to several failure mechanisms and, therefore, the definition of an ultimate load carrying capacity is ambiguous. Nondestructive techniques are thus increasingly required, where the damage severity is quantified not only in terms of damage extension, but also in terms of material response of the damaged region. Based on different approaches, many nondestructive techniques have been proposed in the literature, which are able to provide a quantitative description of the material state. In the present paper, a review of such nondestructive techniques for laminated composites is presented. The main objective is to analyze the damage indexes related to each method and to point out their significance with respect to the residual mechanical performances, as a result of the working principle of each retained technique. A possible guide for future research on this subject is thus outlined.

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Section: Vibrational Methodsmentioning

confidence: 99%

Section: Vibrational Methodsmentioning

confidence: 99%

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Residual Properties in Damaged Laminated Composites through Nondestructive Testing: A Review

et al. 2021

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“…Electromagnetic, piezoelectric, electrostatic, electrodynamic, mechanical, and other methods can also be used to excite vibrations in the sample for the determination of the dynamic modulus of elasticity [3]. Nowadays, many researchers are using Ultrasonic and Impulse Excitation Techniques as non-destructive testing to evaluate the mechanical properties of metallic materials [2][3][4][5][6][7][8][9][10].…”

Section: Of 18mentioning

confidence: 99%

“…In particular, the Impulse Excitation Technique (IET) has been highlighted as a straightforward, non-destructive, and fast method for the determination of the elastic constants and damping characteristics of different classes of materials [5][6][7][8][9]. The IET is based on the acoustic response in free vibration, after an initial impulse, of the material whose elastic properties are to be determined [10].…”

Section: Of 18mentioning

confidence: 99%

Temperature Effect on the Dynamic Young’s Modulus, Shear Modulus, Internal Friction, and Dilatometric Changes in Quenched and Annealed AISI4130 Steel

Matlakhova¹,

Pessanha²,

Alves³

et al. 2023

Preprint

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Elastic properties of materials and their changes with temperature are important for their applications in engineering. A study on the influence of phase composition of AISI 4130 alloy on Young's modulus (Ed), shear modulus (Gd), and damping (Q-1) was carried out by Impulse Excitation Technique (IET). The material characterization was carried out using confocal microscopy, XRD, MET, HV, and dilatometry. A stable structure, composed of ferrite (BCC) and pearlite (α-Fe+Fe3C), was obtained by annealing. Metastable structure of martensite (BCT) was obtained by quenching. The Ed, Gd, and Q-1 were measured, varying the temperature from RT to 900 °C. The values of Ed and Gd, at RT, were determined as 201.5 and 79.2 GPa (annealed), and 190.13 and 76.5 GPa (quenched), respectively. In the annealed steel, the values Ed and Gd decrease linearly on heating up to 650 °C, with the thermal expansion. In the quenched steel, weak changes in the dilatometric curve, Ed, Gd, and Q-1, in the range of 350-450 °C, indicated decompositions of the martensitic phase. Sharp decrease in the moduli and high peak of Q-1, was observed for both samples around 650-900 °C, revealing low lattice elastic stability of the phases during transformations α(BCC)+Fe3C↔γ(FCC).

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Assessment of the Influencing Factors Significance in Non-destructive Testing Systems of Metals Mechanical Characteristics Based on the Bayesian Network

Mirnenko

Mishkov

Balanda

et al. 2021

Lecture Notes in Computational Intelligence and Decision Making

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Nondestructive determination of local material properties of laminated composites with the impulse excitation technique

Cited by 15 publications

References 21 publications

Residual Properties in Damaged Laminated Composites through Nondestructive Testing: A Review

Residual Properties in Damaged Laminated Composites through Nondestructive Testing: A Review

Temperature Effect on the Dynamic Young’s Modulus, Shear Modulus, Internal Friction, and Dilatometric Changes in Quenched and Annealed AISI4130 Steel

Assessment of the Influencing Factors Significance in Non-destructive Testing Systems of Metals Mechanical Characteristics Based on the Bayesian Network

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