Durability Aspects of Structural Adhesive Joints

Panda, H. S.; Samant, Rigved; Mittal, K. L.; Panigrahi, S. K.

doi:10.1002/9781119737322.ch4

Cited by 7 publications

(1 citation statement)

References 75 publications

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“…The issue is complicated by the nonlinearity of frictional heating [11] and the presence of reinforcing CFs (inside thin prepregs), with the latter possessing significantly higher thermal conductivity than that of thermoplastic binders [28]. However, despite all these difficulties, this direction is under intense development, while increasing the durability of the adhesive joints remains a key challenge in design of carbon fiber-reinforced polymer composites (CFRP) [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Energy Director Material on the Structure and Properties of Ultrasonic Welded Lap Joints of PEI Plates with CF Fabric/PEI Prepreg

Tian,

Alexenko,

Panin

et al. 2024

J. Compos. Sci.

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To estimate the possibility of using both low-melting TecaPEI and neat PEI films as energy directors (EDs) for ultrasonic welding (USW) of carbon fiber (CF) fabric–polyetherimide (PEI) laminates, some patterns of structure formation and mechanical properties of their lap joints were investigated by varying the process parameters. The experiment was planned by the Taguchi method with the L9 orthogonal matrix. Based on the obtained results, USW parameters were optimized accounting for maintaining the structural integrity of the joined components and improving their functional characteristics. The use of the low-melting EDTecaPEI film enabled US-welding the laminates with minimal damage to the fusion zone, and the achieved lap shear strength (LSS) values of ~7.6 MPa were low. The use of EDSolverPEI excluded thermal degradation of the components as well as damage to the fusion zone, and improved LSS values to 21 MPa. With the use of digital image correlation (DIC) and computed tomography (CT) techniques, the structural factors affecting the deformation behavior of the USW lap joints were justified. A scheme was proposed that established the relationship between structural factors and the deformation response of the USW lap joints under static tension. The TecaPEI film can be used in USW procedures when very high interlayer adhesion properties are not on demand.

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