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Mechanical interlocking of hybrid PAEK joints using additive manufactured : a study on mechanical interlocking performance and interlocking phenomena enhanced metallic surfaces

Reuling, M.C.T. (2020) Mechanical interlocking of hybrid PAEK joints using additive manufactured : a study on mechanical interlocking performance and interlocking phenomena enhanced metallic surfaces.

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Abstract:For the purpose of this research different AM scanning strategies have been established, tested and optimized to create a structure that can be used for hybrid joining. Different bonding techniques like co-consolidation and overmolding have been performed and have experimentally be verified using a permeability analysis and tensile tests. In regard of the objectives an interface thermal stress analysis and pore analysis have been made to investigate if mechanical bonding between the two materials is possible. Furthermore initial porosity and permeability analysis of the different scanning strategies where done to determine if the AM structure is permeable and desired for bonding. Finally overmolded C/PEEK ribs have been established onto 40x20x2 mm SS316L plates to be able to determine the interface performance using rib pull-off (RPO) tests. Experimental results show that overmolding between carbon polyetheretherketone (C/PEEK) and AM SS316L is possible, with an apparent tensile interface performance of 12 MPa. The hybrid joint shows Velcro-like failure behavior. This means there is an attachment face where intimate contact builds-up, an elastic loading phase where elastic deformation occurs and a detachment face where the joint fails. Furthermore peel behavior at the interface is observed when impregnation of the C/PEEK was extremely well. This peel behavior occurs due the fact that the porous SS316L is forced to open by tensile forces. This allows pores to be torn apart one-by-one. Further research is needed to investigate this peel behavior and investigate other failure modes. In this state of research the bond between C/PAEK and SS316L shows promising behavior for semi-structural applications.
Item Type:Essay (Master)
Faculty:ET: Engineering Technology
Subject:52 mechanical engineering
Programme:Mechanical Engineering MSc (60439)
Link to this item:http://purl.utwente.nl/essays/82574
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