Fatigue analysis of adhesive joints with laser treated substrates

Moroni, F.; Alfano, Marco; Romoli, Luca

doi:10.1016/j.prostr.2016.06.016

Cited by 7 publications

(3 citation statements)

References 10 publications

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“…Tensile [359,[361][362][363] [359, [361][362][363] [364] [359,361] Lap Shear [356,362,365] [356,362,366] [364,365] [359,361,367,368] Lap Shear cont. [369,370] -- [365,371,372] T-peel [373] [361,374] - [361,374] Multiaxial [359,361,375] - [364] -…”

Section: Testing Methodsmentioning

confidence: 99%

“…Laser ablation was on the other hand used by Warren et al [367] to pre-treat carbon fibre composites prior to adhesive bonding and improve the mechanical properties. Moroni et al [374] presented the improvement of the fatigue behaviour of adhesive bonds with aluminium and stainless steel after Yb-fiber laser ablation, a technique that allows for the removal of impurity and weak boundary layers from the mating substrates as well as for the surface modification promoting mechanical interlocking. The results testified an improved interfacial strength and induced fatigue crack growth within the bondline.…”

Section: Influence Of Coatings and Surface Pre-treatment On Adhesive Bondsmentioning

confidence: 99%

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Testing mechanical performance of adhesively bonded composite joints in engineering applications: an overview

Budzik

Wolfahrt

Reis

et al. 2021

The Journal of Adhesion

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The development of new adhesives has allowed to expand the application of bonding into the most diverse industrial fields. This review article presents the commonly used experimental methods for the investigation of mechanical performance of adhesively bonded joints in the aerospace, wind energy, automotive and civil engineering sectors. In these sectors, due to their excellent intrinsic properties, composite materials are often used along with conventional materials such as steel, concrete and aluminium. In this context, and due to the limitations that the traditional joining techniques present, adhesive joints are an excellent alternative. However, standardized experimental procedures are not always applicable for testing representative adhesive joints in these industries. Lack of relevant regulations across the different fields is often overcome by the academia and companies' own regulations and standards. Additional costs are thus mitigated to the industrial sectors in relation with the certification process which effectively can deprive even the biggest companies from promoting adhesive bonding. To ensure continuous growth of the adhesive bonding field the new international standards, focusing on actual adhesive joints' performance rather than on specific application of adhesive joints are necessary.

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Section: Testing Methodsmentioning

confidence: 99%

Section: Influence Of Coatings and Surface Pre-treatment On Adhesive Bondsmentioning

confidence: 99%

Testing mechanical performance of adhesively bonded composite joints in engineering applications: an overview

Budzik

Wolfahrt

Reis

et al. 2021

The Journal of Adhesion

View full text Add to dashboard Cite

show abstract

“…Morini et al showed that a crossed plane laser structure generate a 80% higher G1C rate in double cantilever beam tests compared to sand blasted surfaces. However, the roughness should not be excessive, otherwise, air pockets may trapped in the structures [32] [33] or the wettability is reduced due to oversized single structured hatches [34] . Another way to increase the interlock between adhesive and aluminum substrate by generating area ablated sections was shown by Liu et al [29] .…”

Section: Introduction and State Of The Artmentioning

confidence: 99%

Comprehensive study on the influence of different pretreatment methods and structural adhesives on the shear strength of hybrid CFRP/aluminum joints

Schanz

Meinhard

Dostal

et al. 2021

The Journal of Adhesion

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The aim of this study was to investigate the influence of laser treatments with varying energy density and wavelength on the surface structure, shear strength and fracture behavior of hybrid compounds of thermoset carbon fiber reinforced polymer (CFRP) and aluminum (Al) bonded with three different structural adhesives. The CFRP was pretreated by laser with near-infrared (NIR) and ultraviolet (UV) wavelengths and applying different energy densities. Aluminum surfaces were structured with NIR. Reference CFRP/Al-specimens were prepared by acetone cleaning, low pressure oxygen/argon plasma or sand blasting. The surfaces were investigated microscopically before bonding and after mechanical testing. In addition, the surfaces were examined with white light interferometer and sessile droplet test methods. The bonded compounds were characterized in standardized single lap shear tests to reveal the influence of the pretreatment strategies on the joint strength. Suitable process windows for laser pretreatments were identified, including NIR-pretreatment methods that can compete with an UV-laser source. For every adhesive, a suitable pretreatment method was found.

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Feasibility study of adhesively bonded drills with a small diameter for cutting of CFRP

Stribick,

Wüsteney,

Demir

2024

Int J Adv Manuf Technol

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Adhesively bonded cutting tools possess many advantages over classic (insert) tools due to different manufacturing processes: With reduced manufacturing temperatures, the damage to the cutting edge decreases, and the damping effects of the adhesive enhance the tool’s life. In contrast to standard joining technologies like soldering, adhesive bonding enables the joining of various cutting materials and tool base bodies, like ceramic and steel. Furthermore, the usage of expensive, abrasive-resisted cutting materials, like carbide, has to be reduced in future because of the classification of the components (cobalt, wolfram carbide) as a critical resource. Therefore, this article conducts a feasibility study of adhesively bonded drills with a ceramic tip for cutting carbon-fiber-reinforced plastics. The main contents are investigations of different surface preparation methods (laser surface texturing and SACO-blasting), examining four different adhesives for cutting tool usage, and manufacturing and validating prototype drills for cutting operations. The experimental results show a high scattering of the toughness of the joints between 2.8 MPa and 27.8 MPa, depending on the combination of surface preparation and adhesives. Also, the choice of adhesive influences the performance of the manufactured drills. The maximum number of drilled holes scatters between 15 and 67 holes before breakage. A linear relation within the analysis of axial forces and factors of the covered area is observed. For further studies, the surface preparation needs to be improved, the glass transition temperature must be maximized, and the drill geometry must be optimized. Furthermore, a cooling concept for the cutting tools needs to be investigated.

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Fatigue analysis of adhesive joints with laser treated substrates

Cited by 7 publications

References 10 publications

Testing mechanical performance of adhesively bonded composite joints in engineering applications: an overview

Testing mechanical performance of adhesively bonded composite joints in engineering applications: an overview

Comprehensive study on the influence of different pretreatment methods and structural adhesives on the shear strength of hybrid CFRP/aluminum joints

Feasibility study of adhesively bonded drills with a small diameter for cutting of CFRP

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