The effects of surface roughness on the strength of adhesively bonded cylindrical components

Şekercı́oǧlu, Tezcan; Rende, Hikmet; Gülsöz, A.; Meran, Cemal

doi:10.1016/s0924-0136(03)00463-1

Cited by 45 publications

(7 citation statements)

References 5 publications

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“…For very rough surfaces, insufficient wetting occurs (air can be entrapped in the asperity valleys) and then joint resistance decreases. 37–39 In this study, TF and FS textures exhibited poor wettability (Figure 13). However, the shear strength was greatly improved (Figure 15).…”

Section: Resultsmentioning

confidence: 68%

Effect of bio-inspired surface texture on the resistance of 3D-printed polycarbonate bonded joints

Naat

Boutar

Naïmi

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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Surface preparation before adhesive bonding is crucial to improve the resistance and durability of the joint by altering the surface properties of the adherend. The purpose of surface treatment is to clean the surface from contaminants, activate the adherend surface and create an optimal surface structure to promote adhesion mechanisms. In that context, this work aims to investigate the influence of substrate surface texturing on the resistance of adhesive joints. Two bio-inspired surface textures were investigated, Fish scale (FS) and Tree frog (TF). Polycarbonate (PC) specimens with different surface patterns were manufactured using the fused deposition modelling process. Surface morphology, such as pattern dimension (shape and depth), surface roughness (Ra), and wettability, were used to characterise the substrates. The influence of these texture patterns on the shear strength of adhesively bonded joints was evaluated through the standardised block shear test method ASTM D4501-01. Moreover, the shear strength of the structured joints was compared to the results from bonding with polished surfaces (surfaces abraded with 80, 600 and 1000 grit paper), and with as-printed surfaces. The results revealed that the FS and TF surface textures enhanced the shear strength by 242% and 283% compared to the adhesive joints with polished surfaces. It was also shown that the variation in depth of the bio-inspired surface texture has no significant impact on the joint strength. Failure analysis demonstrated that the fracture mode of bonded joints with polished surfaces was the adhesive failure while mixed failure (cohesive and adhesive) characterises the as-printed, TF and FS surfaces. Worthy results are obtained rising the effectiveness of surface texture for the PC's bonded joints. Graphical Abstract [Formula: see text] This is a graphical representation of the abstract.

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Section: Resultsmentioning

confidence: 68%

Effect of bio-inspired surface texture on the resistance of 3D-printed polycarbonate bonded joints

Naat

Boutar

Naïmi

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…Initially, these pre-treatments were based on roughening the copper surface in a chemical etching process. The surface topography and area of the metal significantly influences the adhesion strength and, as a consequence, the mechanical bond [3,4,5]. The processes, based on etching, create a textured copper oxide surface with or without an additional organic coating which allows the formation of mechanical interlocks during the pressing/lamination step to epoxy resins.…”

Section: Manufacturing Of Copper/epoxy Jointsmentioning

confidence: 99%

Copper/Epoxy Joints in Printed Circuit Boards: Manufacturing and Interfacial Failure Mechanisms

2019

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Printed circuit boards (PCBs) have a wide range of applications in electronics where they are used for electric signal transfer. For a multilayer build-up, thin copper foils are alternated with epoxy-based prepregs and laminated to each other. Adhesion between copper and epoxy composites is achieved by technologies based on mechanical interlocking or chemical bonding, however for future development, the understanding of failure mechanisms between these materials is of high importance. In literature, various interfacial failures are reported which lead to adhesion loss between copper and epoxy resins. This review aims to give an overview on common coupling technologies and possible failure mechanisms. The information reviewed can in turn lead to the development of new strategies, enhancing the adhesion strength of copper/epoxy joints and, therefore, establishing a basis for future PCB manufacturing.

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“…Tezcan studied the influence of surface roughness on the adhesively bonded joints strength under impact loading with different strain rates. It was demonstrated that the lap shearing strength of the adhesively bonded joints will be a minimum value when the surface roughness R a of the substrate was less than 0.1 μm or higher than 2.5 μm [11]. Ghumatkar et al treated the surface of adherend materials with the different mesh numbers of sandpaper to obtain different parameters of roughness, and found that the maximum strength of aluminum/steel adhesive joints corresponds to the most appropriate surface roughness values.…”

Section: Introductionmentioning

confidence: 99%

Influence of Surface Roughening of the Raw Material on the Lap Shearing Strength and Failure Behavior of Adhesively Bonded Aluminum Joints

Liu

Wang

Yan

et al. 2022

Preprint

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Surface roughening of the substrates before bonding plays a significant effect on improving the mechanical performance of the adhesively bonded joints, which are prevalently used for light-weighting vehicle bodies. In this study, the influence of surface roughening on the lap shearing strength and failure behavior of adhesively bonded aluminum sheet joints was investigated. Sandpaper grinding was employed for surface roughening, methods such as tensile testing microstructure observation, etc., was employed for evaluating the performance of the joints. The results showed that the lap shearing strength of adhesively bonded joints increased and then decreased with the surface roughness of the aluminum substrate. The maximum shearing strength of the joint bonded with grinded substrates was 30.4 MPa which was improved by 57.5% compared to that produced with un-grinded substrates. However, over roughening is harmful. When the surface roughness was too large, the failure mode of the joint turned from the mixed failure mode to interfacial failure mode, which decreased the strength of the joints. Related mechanisms were demonstrated. When the substrate surface was coarsened, the bonding area and the wettability of the adhesive on the surface were both increased, which promoted the beneficial mechanical interlock effect between the adhesive and the substrate. However, when the substrate surface was over roughened, defects such as voids, insufficient infiltrating of the adhesive, etc., were induced, which apparently increased the proportion of the interfacial failure area.

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The effects of surface roughness on the strength of adhesively bonded cylindrical components

Cited by 45 publications

References 5 publications

Effect of bio-inspired surface texture on the resistance of 3D-printed polycarbonate bonded joints

Effect of bio-inspired surface texture on the resistance of 3D-printed polycarbonate bonded joints

Copper/Epoxy Joints in Printed Circuit Boards: Manufacturing and Interfacial Failure Mechanisms

Influence of Surface Roughening of the Raw Material on the Lap Shearing Strength and Failure Behavior of Adhesively Bonded Aluminum Joints

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