Effect of atmospheric plasma treatment on Mode-I and Mode-II fracture toughness properties of adhesively bonded carbon fiber/PEKK composite joints

Yıldırım, Ceren; Ulus, Hasan; Beylergi̇l, Bertan; Al‐Nadhari, Abdulrahman; Topal, Serra; Yıldız, Mehmet

doi:10.1016/j.engfracmech.2023.109463

Cited by 26 publications

(1 citation statement)

References 42 publications

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“…Compared to thermoset composites, thermoplastics offer advantages such as high productivity, high damage tolerance, improved damping behavior, recyclability, formability, repairability, and cost‐effectiveness 1 . Therefore, designers and engineers prefer thermoplastics and a wide spectrum of industries are moving toward thermoplastic composites to make more robust, fuel‐efficient, and lighter structures 2–6 . However, since they are available in pellet or film form, they must be melted at high temperatures for the injection molding process.…”

Section: Introductionmentioning

confidence: 99%

Comparative analysis of thermoplastic and thermoset adhesives performance and the influence on failure analysis in jointed elium‐based composite structures

Kaybal,

Ulus

2023

Polymer Composites

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The preference for thermoplastic composites over thermoset ones is steadily growing, especially in constructing resilient, lightweight, and fuel‐efficient structures in industrial settings due to their recyclability and superior energy absorption. Elium®, an acrylic‐based thermoplastic resin, offers enhanced stiffness and improved toughness at room temperature. Investigation into elium‐based composites with diverse fiber reinforcements has revealed elium's potential as an alternative to traditional thermoset epoxy resins. This study explores recyclable elium resin as an adhesive for creating curable and non‐permanent joints in various elium‐based composites. Various joining techniques, including adhesive bonding, mechanical joints, and hybrid bolted/bonded connections, were assessed, with hybrid bonded/bolted (HBB) joints emerging as a preferred solution for structures requiring higher load‐carrying capacity. The study's results indicate that, when using elium adhesive, elium‐hybrid bolted/bonded (HBB) joints demonstrate superior mechanical strength compared to their epoxy counterparts, resulting in improved toughness and stiffness values for each type of composite material. In addition, the research demonstrates superior load‐bearing strengths in bonded glass/elium composite joints using elium adhesive compared to bolted joints, with HBB joints featuring elium adhesive displaying even higher load‐bearing strengths. This research highlights the potential of elium‐based composites and adhesives in various industrial applications, enabling the production of lightweight, robust structures with exceptional damage tolerance.Highlights Investigates recyclable elium resin for curable and non‐permanent joints. Elium‐based composites offer lightweight, robust, and damage‐tolerant structures. Elium HBB joints demonstrate superior strength. FTIR analysis reveals distinct chemical signatures and bonding characteristics. Elium adhesive enhances bond strength.

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Section: Introductionmentioning

confidence: 99%

Comparative analysis of thermoplastic and thermoset adhesives performance and the influence on failure analysis in jointed elium‐based composite structures

Kaybal,

Ulus

2023

Polymer Composites

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Enhancing adhesive bonding and mechanical properties of composite sandwich panels through atmospheric plasma activation

Ozbek,

Yildirim,

Yakin

et al. 2024

Polymer Composites

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This study investigates the effect of atmospheric plasma activation (APA) treatment on the thermomechanical performance of adhesively bonded skins of composite sandwich panels. The investigations show that APA treatment enhances surface wettability through the water contact angle measurements, and adhesion between the skin and honeycomb core of the panels under mechanical tests. Specifically, APA treatment results in an 11% increase in flatwise tensile strength and a 12% enhancement in the impact strength of the sandwich laminates. Flatwise tensile tests reveal superior tensile strength and toughness in APA‐treated specimens, with fracture patterns suggesting more robust adhesion. Charpy impact test results confirm increased energy absorption, reflecting better mechanical resilience. Scanning electron microscopy (SEM) and dynamic mechanical analysis (DMA) techniques are utilized to validate these findings. Overall, APA treatment proves to be an effective technique for enhancing the performance of composite sandwich panels, offering improved adhesion, strength, and impact resistance. This approach holds significant promise for advancing high‐performance composite materials in various engineering applications.Highlights APA treatment enhances wettability and adhesion in sandwich panels. Improved adhesive distribution between skin‐core after sandwich manufacturing. 11% increase in tensile strength and 12% in impact strength with APA. Better toughness and energy absorption via SEM and DMA support in APA.

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Tensile properties of banana fiber reinforced recycled high‐density polyethylene composites: An experimental investigation

Syduzzaman,

Akter,

Mahmud

et al. 2024

SPE Polymers

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Natural fiber‐reinforced polymer composites (NFRCs) are increasingly favored over synthetic fiber‐reinforced alternatives due to their beneficial properties and environmental sustainability. Mechanical properties of composites are critical to ensure optimized utilization of NFRCs. Here, this research explores the effects of different fiber parameters on the tensile strength of high‐density polymer composites reinforced with banana fiber and utilizes the Taguchi method for both experimental and statistical analysis of the outcomes. Three different parameters are considered here: weight fractions, fiber orientation angle, and plasma treatment to fabricate the composites using the compression molding process. Taguchi analysis revealed that fiber orientation angle has the greatest influence among the three variables, with plasma treatment and weight fraction following in impact on tensile strength. The composite that exhibited the highest tensile strength was determined to have a weight fraction of 10%, a fiber orientation angle of 90°, and a plasma treatment period of 5 min. This combination yielded a strength of 30.351 MPa. The analysis of the interaction between any two factors was done using contour plots. In order to compare the experimental tensile strength values with the anticipated values derived from the regression equation, regression analysis was carried out.Highlights Composites were made up of recycled HDPE (rHDPE) from plastic bottles using a compression molding technique. The Taguchi method is applied to achieve an experimental design employing an L4 orthogonal array. Contour plot analysis is conducted to identify points of minimum and maximum responses, as anticipated from the results. Tensile strength was optimized to a maximum of 30.351 MPa.

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Effect of atmospheric plasma treatment on Mode-I and Mode-II fracture toughness properties of adhesively bonded carbon fiber/PEKK composite joints

Cited by 26 publications

References 42 publications

Comparative analysis of thermoplastic and thermoset adhesives performance and the influence on failure analysis in jointed elium‐based composite structures

Comparative analysis of thermoplastic and thermoset adhesives performance and the influence on failure analysis in jointed elium‐based composite structures

Enhancing adhesive bonding and mechanical properties of composite sandwich panels through atmospheric plasma activation

Tensile properties of banana fiber reinforced recycled high‐density polyethylene composites: An experimental investigation

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