Structural Adhesives

Hussey, Bob; Wilson, Jo

doi:10.1007/978-1-4613-1203-1

Cited by 21 publications

(6 citation statements)

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“…For these purposes, a novel CNT-doped adhesive film is going to be used. Adhesive films are widely used in structural applications because of their easier handling and placement, allowing better control of the bonding line thickness . In addition, CNT-based thin films have been proved to have an exceptional sensitivity as strain sensors. − …”

Section: Introductionmentioning

confidence: 99%

Carbon Nanotube-Doped Adhesive Films for Detecting Crack Propagation on Bonded Joints: A Deeper Understanding of Anomalous Behaviors

Sánchez–Romate

Molinero

Jiménez‐Suárez

et al. 2017

ACS Appl. Mater. Interfaces

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A novel nanoreinforced adhesive film has been developed to detect adhesive deformation and crack propagation along the bonding line by means of the electrical response of the material. Adhesive films were doped by spraying an aqueous dispersion of carbon nanotubes (CNTs) over the surface. To determine the sensitivity of bonded joints, single lap shear (SLS) and mode-I fracture energy tests have been carried out while their electrical response has been measured. It has been found that CNT-doped adhesive films are able to detect adhesive deformation and final failure for SLS specimens and crack initiation and propagation along the bonding line for mode-I specimens with a high sensitivity. Sudden increases on electrical resistance are correlated to a rapid growing of the crack length due to instability on crack propagation in a tick-slip case, whereas specimens with a more uniform crack propagation are linked to a steadier increase on electrical resistance, and both of them are properly correlated to the mechanical response. By analyzing more in detail the electrical response and comparing with theoretical approaches, the stick-slip behavior is associated with the presence of porosity and lack of adhesives because of possible manufacturing issues such as adhesive overflowing. These statements are also validated by microstructural analysis. Therefore, the potential and applicability of the proposed adhesive films for evaluating the structural integrity has been demonstrated.

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Section: Introductionmentioning

confidence: 99%

Carbon Nanotube-Doped Adhesive Films for Detecting Crack Propagation on Bonded Joints: A Deeper Understanding of Anomalous Behaviors

Sánchez–Romate

Molinero

Jiménez‐Suárez

et al. 2017

ACS Appl. Mater. Interfaces

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“…Skin patches use two different adhesion mechanisms: the structural adhesive (SA) and the pressure-sensitive adhesive (PSA). The SA mechanism 10 generates high bonding strength by mixing and hardening a base and curing agent of the adhesive (e.g., acrylic and epoxy). However, the SA mechanism has the limitations of low flexibility and biocompatibility of the adhesive.…”

Section: Introductionmentioning

confidence: 99%

Reusable and Porous Skin Patches with Thermopneumatic Adhesion Control Capability and High Water Vapor Permeability

Seok,

Choi,

Cho

2023

ACS Appl. Mater. Interfaces

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We present a reusable and porous skin patch (RPS patch) capable of controlling adhesion force with a thermal− pneumatic method for repetitive use as well as improving moisture permeability for long-term use without skin troubles. Previous skin patches cause skin troubles due to high adhesion force (∼30 kPa) and low moisture permeability (∼382 g/m 2 /day), hindering them from repeatable and long-term use. We control the skin adhesion force of the RPS patch using thermopneumatic pressure generated by an embedded heater on multiple chamber arrays. The RPS patch controls the adhesion force ranging from 8 to 29 kPa on both dry and wet skin while keeping the stable adhesion force for 48 h. It shows repeatable adhesion up to 100 times, and the adhesion force is restored after the RPS patch is washed with water, thus enabling repetitive skin adhesion. We improve the moisture permeability of the RPS patch to 733 g/m 2 / day while maintaining the adhesion force by making the RPS patch with porous materials. The RPS patch shows no skin troubles for 7 days of attachment, thereby being available for long-term skin attachment. The RPS patch, having adhesion control capability and high moisture permeability, shows potential for use in daily life in biomedical applications, including wearable sensors, medical adhesives, and rehabilitation robots.

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“…Examples of equipment and methods for measuring the mechanical properties is the jelly strength testing machine [2] or methods for the stressstrain analysis of the bulk specimen, the derivation of the physical properties of the adhesive, tensile tests of joints (butt joint) or shear adhesive testing through tensile joints testing (single/double lap joints), see Brockmann et al [4]. In parallel, a number of standardised procedures were developed, as well described in Hussey and Wilson [5].…”

Section: Introductionmentioning

confidence: 99%

Review of fatigue of bulk structural adhesives and thick adhesive joints

Zuo

Vassilopoulos

2020

International Materials Reviews

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Fatigue of structural adhesives has been investigated through joints and a little number of works investigate bulk adhesive behaviour itself. Aerospace and automotive engineering focuses more on joint configuration studies, which are correlated with practical applications. Previous works showed that for thin adhesive joints, material properties measured by bulk adhesive testing and joint testing are similar despite the triaxial stress states developing in the adhesive bondlines. However, with the introduction of structural adhesives in construction industry, thicker bondlines have emerged where the bulk adhesive material dominates the joint behaviour. This review work summarises works on the fatigue of bulk structural adhesives used mainly in the construction industry investigating structural adhesives fatigue behaviour either through experiment on joints or on bulk adhesive specimens. The work focuses on thick adhesive bondlines in joints, and discusses the controversy that is over whether adhesive properties from joints or from bulk material should be used.

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Structural Adhesives

Cited by 21 publications

References 0 publications

Carbon Nanotube-Doped Adhesive Films for Detecting Crack Propagation on Bonded Joints: A Deeper Understanding of Anomalous Behaviors

Carbon Nanotube-Doped Adhesive Films for Detecting Crack Propagation on Bonded Joints: A Deeper Understanding of Anomalous Behaviors

Reusable and Porous Skin Patches with Thermopneumatic Adhesion Control Capability and High Water Vapor Permeability

Review of fatigue of bulk structural adhesives and thick adhesive joints

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