Considerations in bond strength evaluation by ultrasonic guided waves

Singher, Liviu; Segal, Y.; Segal, E.; Shamir, Joseph

doi:10.1121/1.410123

Cited by 24 publications

(7 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The QSA boundary conditions ͓Eqs. ͑1a͒ and ͑1d͔͒ have been widely applied to isolated interfaces 1 as well as to interfaces in layered media, 2,3 or between fibers and a matrix 4 . In connection to systems featuring a characteristic length, such as the thickness of a layer, or the radius of a fiber, the legitimate question arises whether the system's structure affects the elastic properties of the imperfect interface.…”

Section: Introductionmentioning

confidence: 99%

The quasistatic approximation for a cracked interface between a layer and a substrate

Pecorari

Kelly

2000

The Journal of the Acoustical Society of America

View full text Add to dashboard Cite

Heuristic in nature, the quasistatic approximation (QSA) describes the interaction of ultrasonic waves with imperfect interfaces by modeling the interfacial imperfection as distributions of springs and masses. The QSA does not provide any relationship between the interfacial stiffness constants and the micromechanics of the defects. The aims of this paper are threefold. First, a derivation from first principles of the QSA boundary conditions on a cracked interface is presented. Relationships linking the interfacial constants to the mechanical and geometrical properties of the distributed cracks are also obtained. Second, the stiffness dependence of a cracked interface between a layer and a substrate on the layer thickness is investigated. It is shown that the interfacial stiffnesses cannot be regarded as intrinsic properties of the interface, but they may also depend on the structural properties of the hosting system. Finally, the effect of the thickness dependence of the interfacial stiffnesses on the phase velocity of the lowest mode supported by the layered structure is investigated.

show abstract

Section: Introductionmentioning

confidence: 99%

The quasistatic approximation for a cracked interface between a layer and a substrate

Pecorari

Kelly

2000

The Journal of the Acoustical Society of America

View full text Add to dashboard Cite

show abstract

“…Over the last two decades, some studies have focused on finding reliable ways of correlating changes in GW propagation with realistic defects in joints. Singher [140,141] investigated the interaction of ultrasonic GW with adhesively bonded single lap metallic joints produced with different surface treatments. Each surface treatment resulted in different bond strength, while the strength should be enhanced for a higher level.…”

Section: New Ultrasonic Welding Application For Polymersmentioning

confidence: 99%

Thermal Welding by the Third Phase Between Polymers: A Review for Ultrasonic Weld Technology Developments

et al. 2020

View full text Add to dashboard Cite

Ultrasonic welding (USW) is a promising method for the welds between dissimilar materials. Ultrasonic thermal welding by the third phase (TWTP) method was proposed in combination with the formation of a third phase, which was confirmed as an effective technology for polymer welding between the two dissimilar materials compared with the traditional USW. This review focused on the advances of applying the ultrasonic TWTP for thermoplastic materials. The research development on the ultrasonic TWTP of polycarbonate (PC) and polymethyl methacrylate (PMMA), polylactic acid (PLA) and polyformaldehyde (POM), and PLA and PMMA are summarized according to the preparation of the third phase, welded strength, morphologies of rupture surfaces, thermal stability, and others. The review aimed at providing guidance for using ultrasonic TWTP in polymers and a basic understanding of the welding mechanism, i.e., interdiffusion and molecular motion mechanisms between the phases.

show abstract

“…Brotherhood et al [5,6] used ultrasonic techniques to detect kissing bonds. Singher et al [7] employed ultrasonic guided waves to evaluate bond quality. It was shown that the quality of the adhesive bond affects the propagation of guided wave modes.…”

Section: Introductionmentioning

confidence: 99%

Solitary wave-based delamination detection in composite plates using a combined granular crystal sensor and actuator

Kim

Restuccia

Yang

et al. 2015

Smart Mater. Struct.

View full text Add to dashboard Cite

We experimentally investigate a diagnostic technique for identifying a weak bond in composites using highly nonlinear solitary waves (HNSWs). We set up a one-dimensional chain of granular crystals, consisting of spherical particles with nonlinear interactions, to generate HNSWs. These solitary wave packets are transmitted into an inspection area of composites by making a direct contact with the chain. We demonstrate that a strong type of solitary waves injected to the weak bond area can break the weak bond of laminates, thereby causing delamination. Then, to identify the creation of the delamination, we transmit a weak type of solitary waves by employing the same apparatus, and measure the solitary waves reflected from the specimens. By analyzing these reflected solitary waves, we differentiate the weak bond samples with the pristine bond ones in an efficient and fast manner. The diagnostic results based on the proposed method are compared with the strength and energy release rate at bond interfaces, which are measured via standard testing methods such as three point bending and end notched flexure tests. This study shows the potential of solitary wave-based detection of weak bonds for hot spot monitoring of composite-based structures.

show abstract

Considerations in bond strength evaluation by ultrasonic guided waves

Cited by 24 publications

References 0 publications

The quasistatic approximation for a cracked interface between a layer and a substrate

The quasistatic approximation for a cracked interface between a layer and a substrate

Thermal Welding by the Third Phase Between Polymers: A Review for Ultrasonic Weld Technology Developments

Solitary wave-based delamination detection in composite plates using a combined granular crystal sensor and actuator

Contact Info

Product

Resources

About