Enhanced delamination resistance of thick-section glass-epoxy composite laminates using compliant thermoplastic polyurethane interlayers

Boyd, Steven E.; Bogetti, Travis A.; Staniszewski, Jeffrey M.; Lawrence, Bradley D.; Walter, Matthew S.

doi:10.1016/j.compstruct.2018.01.062

Cited by 18 publications

(11 citation statements)

References 26 publications

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“…Polymers such as polyurethane (PU), poly(ether ether ketone) (PEEK), poly(tetrafluoroethylene) (PTFE), polycarbonate (PC), and poly(lactic acid) (PLA) have been studied as film interleaves in FRP composites. Ozdil and Carlsson , compared CFRP composites of an epoxy matrix interleaved with a thermoset and a thermoplastic interleave at the midplane.…”

Section: Film Interleavingmentioning

confidence: 99%

Interleaving in Composites for High-Performance Structural Applications

Sasidharan

Anand

2022

Ind. Eng. Chem. Res.

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Fiber-reinforced polymer composites find extensive applications ranging from sporting goods to aircraft components. Nonetheless, the weak interlaminar properties of laminated composites impose challenges in the design of primary load-bearing structures. The incorporation of additives (e.g., particles, films, and fibers) can overcome these limitations, offering additional functionalities to composites. Interleaving in composites generally refers to the incorporation of materials at the interface between two fiber plies so as to improve various properties. Being a simple technique to integrate in the production line, interleaving is recognized as an industrially significant and commercially viable method of modifying laminated composites. In this Review, an effort to assess state-of-the-art research on interleaving is attempted. Methods, applications, and the influence of interleaves on various properties of composites are also discussed. Data from the most recent research works on interleaved composites are compiled in an attempt to aid and encourage further developments among industries and academia.

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Section: Film Interleavingmentioning

confidence: 99%

Interleaving in Composites for High-Performance Structural Applications

Sasidharan

Anand

2022

Ind. Eng. Chem. Res.

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“…To identify a compatible thermoplastic material, an extensive literature survey was carried out (e.g., [1,7,10,[15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34]). A few materials were selected initially and their characteristics after melting as well as during the cool down process were studied.…”

Section: Thermoplastic Films Fabricationmentioning

confidence: 99%

Enhancement in Interply Toughness of BMI Composites Using Micro-Thin Films

2021

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Nowadays, laminated composites are widely used in the aerospace sector. All laminates have interply/interlaminar interfaces even if they are made using automated processes. The interfaces act as the areas of weaknesses and the potential crack initiation regions. Hence, any enhancement in the crack initiation and propagation resistance is always sought after. Usage of polymeric thin films is one of the promising and viable ways to achieve this. It is also easy to incorporate micro-thin films into any automation process. In the present study, different customized thin films that are compatible with Glass/BMI composites are fabricated. Fracture toughness tests in Mode I (opening mode), Mode II (sliding mode) and Mixed Mode I/II are conducted respectively using Double Cantilever Beam (DCB), End Notch Flexure (ENF) and Mixed Mode Bending (MMB) test specimens. This paper discusses the manufacturing of compatible micro-thin films. The various challenges faced during the manufacturing and incorporation of thin films are presented. The results of the various fracture toughness tests are examined. Mechanisms through which the different films help in resisting the crack initiation and propagation are deliberated and discussed. The incorporation of this technique in Automated Fiber Placement (AFP) is also discussed.

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“…Many researchers have used TPU to toughen existing materials and develop new composite materials. For instance, Boyd et al [25] improved the delamination resistance and durability of structural composite laminates with TPU interlayers that allow decoupling the structural plies within the laminate, thus preventing catastrophic [19] delamination. The TPU molding process is simple and allows for the fabrication of products with various shapes, and therefore has been utilized throughout automotive, transportation, textile, petrochemical, building construction, shipbuilding, mechanical engineering, electronic information, medical, and military industries [26,27].…”

Section: Introductionmentioning

confidence: 99%

A Soy Protein-Based Composite Film with a Hierarchical Structure Inspired by Nacre

Xu¹,

Xu²,

Chen³

et al. 2022

Journal of Renewable Materials

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Soy protein-based composite film is a potential replacement for petroleum-based film with multipurpose applications and cleaner production. It is difficult to improve both the tensile strength and toughness of a protein-based film without sacrificing its elongation. In this study, inspired by the hierarchical structure of nacre, a facile yet delicate strategy was developed to fabricate a novel bio-based film with excellent toughness and high strength. Triglycidylamine (TGA) crosslinked soy protein (SPI) as hard phase and thermoplastic polyurethane elastomer (TPU) as soft phase comprise an alternative lay-up hierarchical structure. The interface of these two phases is enhanced using triglycidylamine (TGA) surface-modified TPU (MTPU). The tensile strength of SPI/MTPU/TGA films increases by 392% to 7.78 MPa and their toughness increases by 391% to 8.50 MJ/m 3 compared to soy protein/glycerol film. The proposed hierarchical structure can also be extended to other high-performance materials and polymers.

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Enhanced delamination resistance of thick-section glass-epoxy composite laminates using compliant thermoplastic polyurethane interlayers

Cited by 18 publications

References 26 publications

Interleaving in Composites for High-Performance Structural Applications

Interleaving in Composites for High-Performance Structural Applications

Enhancement in Interply Toughness of BMI Composites Using Micro-Thin Films

A Soy Protein-Based Composite Film with a Hierarchical Structure Inspired by Nacre

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