Computational Approach Toward Advanced Composite Material Qualification and Structural Certification

Abdi, Frank; Surdenas, J.; Munir, Nasir I.; Housner, J. M.; Keshavanarayana, Raju

doi:10.1007/978-0-387-95924-5_6

Cited by 7 publications

(10 citation statements)

References 16 publications

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“…Thus, innovative engineering methods are required to increase structural efficiency. They have to be able to capture structural mechanical relevant phenomena (both on structure and material level) [1,2]. A further challenge is to gradually reconsider and adapt the classical methods of structural design as well as the conservative tolerance directives (cf.…”

Section: Discussionmentioning

confidence: 99%

“…Regarding this challenge, a considerable efficiency increase is possible along the entire development chain of fiber composite components. Manufacturers are currently struggling to fully exploit the mechanical capabilities of composite structures due to conservative design and high quality requirements during the production and assembly process [1,2]. Comprehensive technical databases for managing manufacturing induced imperfections and tolerances are missing [1] (p. 150).…”

Section: Introductionmentioning

confidence: 99%

“…Manufacturers are currently struggling to fully exploit the mechanical capabilities of composite structures due to conservative design and high quality requirements during the production and assembly process [1,2]. Comprehensive technical databases for managing manufacturing induced imperfections and tolerances are missing [1] (p. 150). So far, issues emerging from manufacturing uncertainties (e.g., imperfections and tolerances) have not received sufficient attention in the development and certification of composite components.…”

Section: Introductionmentioning

confidence: 99%

“…In order to ensure the process is robust, a considerable effort is spent. The aerospace sector annually invests roughly 350 million Euro [1] (S. 137) solely for certification purposes of materials and components made from fiber-reinforced plastics. Besides, by means of manufacturing trials based on the trial and error principle, a robust process window with associated optimal process parameters is identified for each component.…”

Section: Introductionmentioning

confidence: 99%

“…Currently, the manufacturers of composite structures react to uncertainties emerging from manufacturing with high safety margins, so-called knock-down factors (KDFs) for the mechanical properties [1][2][3], and elevated rejection rates. During process monitoring and component quality testing, strict compliance with the demanding structural and tolerance requirements often leads to unscheduled idle times and downtime due to rework and repairs [1] (S. 150). In relation to the cycle time of an AFP machine, the time required for manual quality assurance and rework is currently up to 41 % (cf.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Manufacturing-Induced Imperfections in Composite Parts Manufactured via Automated Fiber Placement

2019

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The automated fiber placement process (AFP) enables the manufacturing of large and geometrical complex fiber composite structures with high quality at low cycle times. Although the AFP process is highly accurate and reproducible, manufacturing induced imperfections in the produced composite structure occur. This review summarizes and classifies typical AFP-related manufacturing defects. Several methodologies for evaluating the effects of such manufacturing defects from the literature are reviewed. This review paper presents recent scientific contributions and discusses proposed experimental and simulation-based methodologies. Among the identified ten defect classes, gaps and overlaps are predominant. This paper focuses then on methods for modelling and assessing gaps and overlaps. The state of the art in modelling gaps and overlaps and assessing their influence on mechanical properties is presented. Finally, research gaps and remaining issues are identified.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Manufacturing-Induced Imperfections in Composite Parts Manufactured via Automated Fiber Placement

2019

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Project Management Considerations: Design Architectures for Civil and Military Aircraft

Gambino

2012

Wiley Encyclopedia of Composites

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The historical evolution of the use of composite materials in actual aerospace vehicles is presented. The work emphasizes the application of composite structures in moderately to heavily loaded aerospace vehicles. Applications of composite materials are reviewed for large commercial transport aircraft, general aviation, and military aircraft. Currently, a large variety of composite components are used in aircraft. An overview of the state of the art of advanced technologies and architectures is presented. While significant improvements have occurred to structural analysis methodologies over the last two decades, the current structural design and analysis methodologies used by the aeronautics industry are still largely semiempirical. Very accurate finite element methods and sophisticated computer codes are used routinely to calculate the stress, strain, and displacement fields in complex structural geometries. State of the art of composites material simulation is presented. An overview of certification of integrated/combined composite‐metallic primary airframe structure is presented. The work is concluded with an evaluation of the future technology challenges associated with applications of composite materials to the primary and secondary structures of commercial aircraft.

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AF-Challenges-Synthetic Materials (Polymer and Ceramic) Lifing Model Blind Test Validation

Baid¹,

Eftekharian²,

Bahadori³

et al. 2023

Lecture Notes in Mechanical Engineering

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Computational Approach Toward Advanced Composite Material Qualification and Structural Certification

Cited by 7 publications

References 16 publications

Manufacturing-Induced Imperfections in Composite Parts Manufactured via Automated Fiber Placement

Manufacturing-Induced Imperfections in Composite Parts Manufactured via Automated Fiber Placement

Project Management Considerations: Design Architectures for Civil and Military Aircraft

AF-Challenges-Synthetic Materials (Polymer and Ceramic) Lifing Model Blind Test Validation

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