Joining Technologies for Hybrid Polymeric Composites

A special issue of Fibers (ISSN 2079-6439).

Deadline for manuscript submissions: closed (25 February 2023) | Viewed by 12128

Special Issue Editor


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Guest Editor
Department Solid State Materials Processing, Institute for Materials Mechanics, Helmholtz Zentrum Hereon, 21502 Geesthacht, Germany
Interests: hybrid structures; polymer–metal joining; friction stir welding; process optimization
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Special Issue Information

Dear Colleagues,

The joining of different materials is in itself an art under the protective cover of science. Hybrid polymeric composites, as well as hybrid structures, are contributing to the progress of society, and the joining technologies provide the key to using them in applications in daily life. Such applications include transportation, housing, infrastructure, and electronic devices, with many more applications to follow in a rhythm unlikely to be foreseen.

The challenges arising when joining hybrid polymeric composites are related to their concomitant versatility in properties, manufacturing, and processing, with inexhaustible possibilities of development. Industrial applications of hybrid structures spawn further specific issues for both materials and their joining techniques. Moreover, societal and environmental pressure is pushing the boundaries, with provocations for higher productivities and efficiencies and lower environmental impact and costs, all of course in the most sustainable way and with no penalties in comfort and functionality compared to other classical solutions.

You are all kindly invited to contribute to this Special Issue of Fibers covering all aspects “connected” to the joining of hybrid polymeric composite materials. This Special Issue will include research on innovative welding and joining technologies and additive manufacturing as well as recent advances in already established techniques. Topics of interest will be (but are not limited to) the influence of joining variables on mechanical properties and joint behavior, properties and characterization of joined materials and interfaces, influence of material manufacturing and composite structure on joinability, physical–chemical properties, hybrid structures, and dissimilar joints. Contributions with experimental or theoretical approaches from all fields of applications of composite materials are welcome.

Kind regards

Dr. Lucian Blaga
Guest Editor

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Keywords

  • Welding and joining
  • Process–structure–properties–performance correlation
  • Physical–chemical properties
  • Additive manufacturing
  • Joint characterization
  • Interfaces
  • Hybrid Structures
  • Polymeric composites

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Published Papers (3 papers)

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Research

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15 pages, 5701 KiB  
Article
Differentiation in the SiC Filler Size Effect in the Mechanical and Tribological Properties of Friction-Spot-Welded AA5083-H116 Alloy
by S. Suresh, Elango Natarajan, Gérald Franz and S. Rajesh
Fibers 2022, 10(12), 109; https://doi.org/10.3390/fib10120109 - 15 Dec 2022
Cited by 20 | Viewed by 2492
Abstract
Ceramic reinforced friction stir spot-welding (FSSW) is one of the unique welding techniques used to fabricate spot joints. This study is intended to investigate the effect of reinforcement additive particle size in achieving higher weld strengths. AA5083-H116 aluminum alloy plates were welded with [...] Read more.
Ceramic reinforced friction stir spot-welding (FSSW) is one of the unique welding techniques used to fabricate spot joints. This study is intended to investigate the effect of reinforcement additive particle size in achieving higher weld strengths. AA5083-H116 aluminum alloy plates were welded with nano- and micro-sized silicon carbide (SiC) particles. Investigations of the weld joints prepared using a tool rotational speed of 1300 rpm, tool plunge rate of 25 mm/min, and dwell time of 10 s revealed that the lap shear tensile strength and hardness of the nano-SiC particles added to aluminum joints were higher than those of the micro-SiC particles added to joints. In particular, the nano-SiC particles provided 29.6% higher strength and 23.3% higher hardness than the unfilled FSSW. The uniformly dispersed fine SiC particles in the processed zone provided more nucleation sites for the re-precipitation of new grains and the precipitates in the aluminum matrix. The X-ray diffraction results confirmed that there was no evidence of a new phase (intermetallic compounds). Reinforcement of SiC particles significantly enhanced the wear characteristics, as well (26.3%). Field emission scanning electron microscopy (FESEM) evidenced the uniform distribution of SiC particles in the weld nugget zone. In addition, the fractography of the samples is presented and discussed. Full article
(This article belongs to the Special Issue Joining Technologies for Hybrid Polymeric Composites)
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18 pages, 8107 KiB  
Article
Damage Tolerance of a Stiffened Composite Panel with an Access Cutout under Fatigue Loading and Validation Using FEM Analysis and Digital Image Correlation
by Pavan Hiremath, Sathyamangalam Ramanarayanan Viswamurthy, Manjunath Shettar, Nithesh Naik and Suhas Kowshik
Fibers 2022, 10(12), 105; https://doi.org/10.3390/fib10120105 - 8 Dec 2022
Cited by 2 | Viewed by 2394
Abstract
Aircraft structures must be capable of performing their function throughout their design life while meeting safety objectives. Such structures may contain defects and/or damages that can occur for several reasons. Therefore, aircraft structures are inspected regularly and repaired if necessary. The concept of [...] Read more.
Aircraft structures must be capable of performing their function throughout their design life while meeting safety objectives. Such structures may contain defects and/or damages that can occur for several reasons. Therefore, aircraft structures are inspected regularly and repaired if necessary. The concept of combining an inspection plan with knowledge of damage threats, damage growth rates, and residual strength is referred to as “damage-tolerant design” in the field of aircraft design. In the present study, we fabricated a composite panel with a cutout (which is generally found in the bottom skin of the wing) using a resin infusion process and studied the damage tolerance of a co-cured skin-stringer composite panel. The composite panel was subjected to low-velocity impact damage, and the extent of damage was studied based on non-destructive inspection techniques such as ultrasonic inspection. Fixtures were designed and fabricated to load the composite panel under static and fatigue loads. Finally, the panel was tested under tensile and fatigue loads (mini TWIST). Deformations and strains obtained from FE simulations were compared and verified against test data. Results show that the impact damages considered in this study did not alter the load path in the composite panel. Damage did not occur under the application of one block (10% life) of spectrum fatigue loads. The damage tolerance of the stiffened skin composite panel was demonstrated through test and analysis. Full article
(This article belongs to the Special Issue Joining Technologies for Hybrid Polymeric Composites)
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Review

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47 pages, 13304 KiB  
Review
A Review on Drilling of Multilayer Fiber-Reinforced Polymer Composites and Aluminum Stacks: Optimization of Strategies for Improving the Drilling Performance of Aerospace Assemblies
by Gérald Franz, Pascal Vantomme and Muhammad Hafiz Hassan
Fibers 2022, 10(9), 78; https://doi.org/10.3390/fib10090078 - 9 Sep 2022
Cited by 14 | Viewed by 6094
Abstract
In recent years, the use of hybrid composite stacks, particularly CFRP/Al assemblies, and fiber metal laminates (FMLs) has progressively become a convincing alternative to fiber-reinforced polymers (FRPs) and conventional metal alloys to meet the requirements of structural weight reduction in the modern aerospace [...] Read more.
In recent years, the use of hybrid composite stacks, particularly CFRP/Al assemblies, and fiber metal laminates (FMLs) has progressively become a convincing alternative to fiber-reinforced polymers (FRPs) and conventional metal alloys to meet the requirements of structural weight reduction in the modern aerospace industry. These new structural materials, which combine greater mechanical properties with low specific mass, are commonly assembled by riveted and bolted joints. The drilling operation, which represents the essential hole-making process used in the aerospace industry, proves particularly challenging when it comes to achieving damage-free holes with tight tolerances for CFRP/Al stacks in one-shot operations under dry conditions due to the dissimilar mechanical and thermal behavior of each constituent. Rapid and severe tool wear, heat damage, oversized drilled holes and the formation of metal burrs are among the major issues induced by the drilling of multi-material stacks. This paper provides an in-depth review of recent advancements concerning the selection of optimized strategies for high-performance drilling of multi-material stacks by focusing on the significant conclusions of experimental investigations of the effects of drilling parameters and cutting tool characteristics on the drilling performance of aerospace assemblies with CFRP/Al stacks and FML materials. The feasibility of alternative drilling processes for improving the hole quality of hybrid composite stacks is also discussed. Full article
(This article belongs to the Special Issue Joining Technologies for Hybrid Polymeric Composites)
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