Bond interface design for single lap joints using polymeric additive manufacturing

Garcia, Ricardo Fernandes; Prabhakar, Pavana

doi:10.1016/j.compstruct.2017.05.060

Cited by 68 publications

(36 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Garcia et al [ 54 ] investigated the effect of an AM tailored macro pattern on an adherend that protrudes into the bonding line ( Figure 12 ). The authors used the FDM process to create a tailored texture on carbon fiber-reinforced polymeric (CFRP) adherends with the AddJoining method [ 12 ].…”

Section: Joint Design Strategies For Additive Manufacturingmentioning

confidence: 99%

“…Specimens were manufactured and numerically modelled, using a composite-like material approach presented in [ 48 ]. The authors compared the results of these approaches to the ones obtained with a reinforcement pattern on the surface designed as presented in [ 54 ] by Garcia et al Adherends were manufactured in the various geometries using FDM with polyetherimide (PEI) material. The adhesive used (Loctite LM-21 HP) had excellent compatibility with PEI without surface treatment.…”

Section: Joint Design Strategies For Additive Manufacturingmentioning

confidence: 99%

“…Among the joints with tailored overlap geometry, the scarf joint had the best performance improvement of about 66%, despite an almost unchanged overlap area. In the specimens manufactured according to the work of Garcia et al [ 54 ], adherend failures occurred at low loading due to stress peaks at the pattern locations.…”

Section: Joint Design Strategies For Additive Manufacturingmentioning

confidence: 99%

See 2 more Smart Citations

Review of Tailoring Methods for Joints with Additively Manufactured Adherends and Adhesives

et al. 2020

View full text Add to dashboard Cite

This review aims to assess the current modelling and experimental achievements in the design for additive manufacturing of bonded joints, providing a summary of the current state of the art. To limit its scope, the document is focused only on polymeric additive manufacturing processes. As a result, this review paper contains a structured collection of the tailoring methods adopted for additively manufactured adherends and adhesives with the aim of maximizing bonded joint performance. The intent is, setting the state of the art, to produce an overview useful to identify the new opportunities provided by recent progresses in the design for additive manufacturing, additive manufacturing processes and materials’ developments.

show abstract

Section: Joint Design Strategies For Additive Manufacturingmentioning

confidence: 99%

Section: Joint Design Strategies For Additive Manufacturingmentioning

confidence: 99%

Section: Joint Design Strategies For Additive Manufacturingmentioning

confidence: 99%

See 1 more Smart Citation

Review of Tailoring Methods for Joints with Additively Manufactured Adherends and Adhesives

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Different types of materials and different mixes have been tested. From metallic alloys, for example, Yin et al studied the additive manufacturing of Al-Ti6Al4V FGM in SLM (Selective Laser Melting) and CS (Cold Spraying) and produced samples with no intermetallics at the interfaces [3], whereas for polymers, Garcia and Prabhakar investigated the interface in polymeric additive manufacturing [4]. Different multi-material interfaces are also discussed in the review paper of Bandyopadhyay and Heer [5].…”

Section: Introductionmentioning

confidence: 99%

Multiscale study of different types of interface of a buffer material in powder-based directed energy deposition: Example of Ti6Al4V/Ti6Al4V - Mo/Mo - Inconel 718

Thiriet

Schneider-Maunoury

Laheurte

et al. 2019

Additive Manufacturing

View full text Add to dashboard Cite

When it is difficult to deposit a material A on a material B, it is possible to create a Functionally Graded Material (FGM) using a buffer material between them to avoid the appearance of defects. The literature shows that it is very difficult, nay impossible, to have an efficient metallurgical bond between Ti6Al4V and Inconel-Mo alloys without cracks, porosities or delamination. A buffer material is therefore needed (here 25% Ti6Al4V -75% Mo) and the fine analysis of the two interfaces thus created makes it possible to define the relevance of the choice of the buffer. Moreover, the understanding of the phenomena taking place at the interface allows the preservation of the structural integrity of a FGM made by additive manufacturing. CLAD® powder-based directed energy deposition allows the building of parts containing FGM and/or buffer materials directly during the process. The study of the interfaces at both sides of the buffer material is essential. In this paper, the first interface 100 Ti6Al4V / 25 Ti6Al4V -75 Mo (in wt%) is smooth, suggesting that there has been diffusion between both alloys. The second one, 25 Ti6Al4V -75 Mo / 30 Inconel 718 -70 Mo, contains numerous exotic structures between both alloys. For such a sharp interface, we show in this paper that a microscopic study is not sufficient, but a finer scale is necessary to have a good metallurgical insight. Thus, EDS, TKD and X-ray crystallography were performed right on this interface and revealed three main structures: a hexagonal matrix, a cubic structure and an ordered hexagonal one. The hexagonal matrix appears to consist of Ni 3 Ti and the ordered hexagonal one of NiMo.

show abstract

“…In another method, a thin adhesive layer was deposited by spin coating and the transfer toward the intended locations on the micromechanical structure could be controlled . The patterning of adhesive joints by additive manufacturing may increase the shear strength compared to homogeneous adhesive interlayers and induce predominantly cohesive failure . The photochemical patterning of adhesive layers may be a valid alternative: crosslinking of polymers under UV light provides good bonding quality because of small shrinkage compared to thermal curing and it is more environmentally friendly.…”

Section: Introductionmentioning

confidence: 99%

Dewetting and photochemical crosslinking of adhesive pads onto lithographically patterned surfaces

Samyn

Biesalski²,

Prucker

et al. 2018

J of Applied Polymer Sci

View full text Add to dashboard Cite

The design of structured adhesive interfaces can be realized by dewetting of a liquid adhesive onto substrates with hydrophilic and hydrophobic domains followed by photochemical crosslinking. The latter allows the creation of well-defined arrays of confined adhesive pads with a controlled geometry. In a first step, the surfaces are covered by a hydrophobic film and lithographically patterned through a mask with an array of spots with diameter of 2 mm. The adhesive can consequently be locally deposited by a dosing syringe and remains confined within the hydrophilic spots. By defining the volume of the adhesive droplets, the contact angle and height of the adhesive pads are controlled through pinning at the hydrophilic/hydrophobic interface, which prevents further spreading. Alternatively, the dip coating and spontaneous dewetting of liquid adhesive over the patterned surface provide a continuous fabrication method for adhesive pad arrays. In a second step, the geometry of the deposited adhesive pads is stabilized by partial crosslinking during different times under UV light. Finally, an adhesive joint is created by applying the counterface followed by full cross-linking. The adhesive strength and mechanical performance are further optimized by considering different crosslinking times and pattern designs.

show abstract

Bond interface design for single lap joints using polymeric additive manufacturing

Cited by 68 publications

References 17 publications

Review of Tailoring Methods for Joints with Additively Manufactured Adherends and Adhesives

Review of Tailoring Methods for Joints with Additively Manufactured Adherends and Adhesives

Multiscale study of different types of interface of a buffer material in powder-based directed energy deposition: Example of Ti6Al4V/Ti6Al4V - Mo/Mo - Inconel 718

Dewetting and photochemical crosslinking of adhesive pads onto lithographically patterned surfaces

Contact Info

Product

Resources

About