Bonding Technologies in Manufacturing Engineering

Homayouni, Seyed Mahdi; Vasili, Mohammadreza; Hong, Tang Sai

doi:10.1016/b978-0-08-096532-1.00609-9

Cited by 8 publications

(4 citation statements)

References 53 publications

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“…They have become an indispensable part of the new generation of stealth fighters. Currently, advanced composites have become one of the most important aviation and aerospace structural materials after aluminum alloys, titanium alloys and steels, and they are widely used in aircraft structures, ranging from non-bearing and subbearing structures to main bearing structures [7,8]. The proportion of the usage and the used parts have been taken as the key indexes to measure the advancement of the aircrafts and international competitiveness.…”

Section: Introductionmentioning

confidence: 99%

Effects of Curing Defects in Adhesive Layers on Carbon Fiber–Quartz Fiber Bonded Joint Performance

Yang,

Zhang,

Zhan

et al. 2024

Polymers

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Due to their mechanical load-bearing and functional wave transmission, adhesively bonded joints of carbon fiber–quartz fiber composites have been widely used in the new generation of stealth aviation equipment. However, the curing defects, caused by deviations between the process environment and the setting parameters, directly affect the service performance of the joint during the curing cycle. Therefore, the thermophysical parameter evolution of adhesive films was analyzed via dynamic DSC (differential scanning calorimeter), isothermal DSC and TGA (thermal gravimetric analyzer) tests. The various prefabricating defects within the adhesive layer were used to systematically simulate the impacts of void defects on the tensile properties, and orthogonal tests were designed to clarify the effects of the curing process parameters on the joints’ bonding performance. The results demonstrate that the J-116 B adhesive film starts to cure at a temperature of 160 °C and gradually forms a three-dimensional mesh-bearing structure. Furthermore, a bonding interface between the J-116 B adhesive film and the components to be connected is generated. When the curing temperature exceeds 200 °C, both the adhesive film and the resin matrix thermally degrade the molecular structure. The adhesive strength weakens with an increasing defect area ratio and number, remaining more sensitive to triangle, edge and penetration defects. By affecting the molecular structure of the adhesive film, the curing temperature has a significant impact on the bonding properties; when the curing degree is ensured, the curing pressure directly impacts the adhesive’s performance by influencing the morphology, number and distribution of voids. Conversely, the heating rate and heat preservation time have minimal effects on the bonding performance.

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Section: Introductionmentioning

confidence: 99%

Effects of Curing Defects in Adhesive Layers on Carbon Fiber–Quartz Fiber Bonded Joint Performance

Yang,

Zhang,

Zhan

et al. 2024

Polymers

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“…In the optical manufacturing process, wringing is usually applied for the temporary attachment of optical components to manufacturing tools made of glass. Physically, the effect of wringing can be based on intermolecular phenomena [2] such as dipole-dipole or van-der-Waals forces [3] on the one hand and a thin water film and capillary forces on the other hand [4]. Due to the different expansion coefficients of different glasses, such an attachment can be easily released by heating.…”

Section: Introductionmentioning

confidence: 99%

Atmospheric Pressure Dielectric Barrier Discharge Plasma-Enhanced Optical Contact Bonding of Coated Glass Surfaces

Neumann¹,

Brückner²,

Viöl

et al. 2021

Applied Sciences

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This paper reports on plasma-enhanced bonding of optics surfaces coated with highly sensitive functional layers using surface preparation by a dielectric barrier discharge (DBD) plasma. The samples to be bonded were treated with a DBD in diffuse mode at atmospheric pressure for 30 s which is applied directly to the sample surface, then joined with the aid of de-ionised water and cured subsequently. The plasma treatment itself already increased the shear strength achieved by a factor of two compared to classical wringing or direct contacting, while the curing process led to a further increase by a factor of up to five, depending on curing temperature. The observed enhancement of shear strength can be attributed to DBD plasma-induced cleaning and most likely additional activation of the surface as verified by contact angle measurements. Since the impact of the used plasma on the surface is quite gentle in comparison to other bonding processes or other plasma-based processes reported in the literature, a destruction of the treated functional layer is avoided. This advantage makes it possible to bond even optics surfaces coated with sensitive materials.

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“…• Time • Contact Pressure • Temperature Solid bonding occurs in several different manufacturing processes [2]. The processes can be divided in two different categories, namely welding and forming.…”

Section: Introductionmentioning

confidence: 99%

On the Solid Bonding Phenomena in Linear Friction Welding and Accumulative Roll Bonding Processes: Numerical Simulation Insights

Campanella¹,

Buffa²,

Fratini³

et al. 2015

KEM

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Solid Bonding based welding processes allow to obtain defect free joints with low residual stress and low distortion. However, the engineering and optimization of solid bonding processes is difficult and requires a large number of time and cost consuming test trials. In this way, proper numerical models are essential tools permitting effective process design. The aim of this research was the comparison of the material process conditions during two different manufacturing processes taking advantage of the same metallurgical phenomenon, namely solid bonding. Linear Friction Welding, used to weld non-axisymmetric components and Accumulative Roll Bonding, used to increase the mechanical properties of sheet metals, were considered. Numerical models were set up, validated and used to design the process by studying the complex material behavior during the solid bonding of different aluminum alloys. An implicit approach was used for the Linear Friction Welding and Accumulative Roll Bonding processes, leading to the understanding of the main process variables influence on the field variables distribution and the occurrence of actual bonding.

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Bonding Technologies in Manufacturing Engineering

Cited by 8 publications

References 53 publications

Effects of Curing Defects in Adhesive Layers on Carbon Fiber–Quartz Fiber Bonded Joint Performance

Effects of Curing Defects in Adhesive Layers on Carbon Fiber–Quartz Fiber Bonded Joint Performance

Atmospheric Pressure Dielectric Barrier Discharge Plasma-Enhanced Optical Contact Bonding of Coated Glass Surfaces

On the Solid Bonding Phenomena in Linear Friction Welding and Accumulative Roll Bonding Processes: Numerical Simulation Insights

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