A mesoscale ultrasonic attenuation finite element model of composites with random-distributed voids

Yu, Yong; Ye, Jinrui; Wang, Yang; Zhang, Boming; Qi, Guocheng

doi:10.1016/j.compscitech.2013.09.006

Cited by 18 publications

(19 citation statements)

References 11 publications

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“…11 showing the enlarged cross-sections of the specimens, it is seen that the interlaminar resin-rich regions are thicker when the porosity content is higher. This feature is also in line with the observation of Yu et al [31] for quasi-isotropic CFRP laminates. Therefore, it is reasonable to assume that the specimens with higher porosity contents are associated with lower interlayer interfacial stiffnesses.…”

Section: Effect Of Variable Interlayer Interfacial Stiffnesssupporting

confidence: 81%

“…Such behavior has also been reported by Yu et al [31] in their measurement and finite element analysis. In Fig.…”

Section: Velocity and Attenuationsupporting

confidence: 60%

“…In contrast to the aforementioned works [26][27][28]31], the present analysis is carried out in the frequency domain. This is of particular advantage when incorporating the viscoelastic properties of CFRP exhibiting nearly linear frequency dependence of the attenuation coefficients [32][33][34].…”

Section: Introductionmentioning

confidence: 99%

“…Finite difference [26][27][28] as well as finite element methods [31] have been adopted to simulate the ultrasonic wave propagation in porosity-containing composite materials. In these previous works, the composites are modeled as elastic solids with distributed pores.…”

Section: Introductionmentioning

confidence: 99%

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Influence of porosity on ultrasonic wave velocity, attenuation and interlaminar interface echoes in composite laminates: Finite element simulations and measurements

Ishii

Biwa

Kuraishi

2016

Composite Structures

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The influence of porosity on the ultrasonic wave propagation in unidirectional carbon-fiber-reinforced composite laminates is investigated based on the two-dimensional finite element analysis and measurements. Random distributions of pores with different contents and size are considered in the analysis, together with the effects of viscoelastic plies and interlaminar resin-rich regions. The transient reflection waveforms are calculated from the frequency-domain finite-element solutions by the inverse Fourier transform. As the measures for porosity characterization, the ultrasonic wave velocity, attenuation coefficient, and interlaminar interface echo characteristics are examined for 24-ply unidirectional composite laminates. As a result, the wave velocity decreases with the porosity content in a manner insensitive to the pore size. On the other hand, the attenuation coefficient increases both with the porosity content and with the pore size. The time-frequency analysis of the reflection waveforms shows that the temporal decay rate of interlaminar interface echoes at the stop-band frequency is a good indicator of the porosity content. The measured porosity-content dependence of the wave velocity is better reproduced by the numerical simulations when the interlayer interfacial stiffnesses are adjusted according to the porosity content, indicating that not only the porosity features but also the interlaminar interfacial properties vary with curing conditions.

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Section: Effect Of Variable Interlayer Interfacial Stiffnesssupporting

confidence: 81%

“…Such behavior has also been reported by Yu et al [31] in their measurement and finite element analysis. In Fig.…”

Section: Velocity and Attenuationsupporting

confidence: 60%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of porosity on ultrasonic wave velocity, attenuation and interlaminar interface echoes in composite laminates: Finite element simulations and measurements

Ishii

Biwa

Kuraishi

2016

Composite Structures

View full text Add to dashboard Cite

show abstract

“…Fiber-reinforced composites are increasingly used as structural parts in the fields of civil engineering, aviation and aerospace for their excellent mechanical properties [1][2][3]. In a unidirectional (UD) composite, stress transfer around a fiber break is vital to the fiber failure process [4][5][6].…”

Section: Introductionmentioning

confidence: 99%