Stress Concentration Around Circular Hole in a Composite Material Specimen Representative of the X-29a Forward-Swept Wing Aircraft

Stress Concentration Around Circular Hole in a Composite Material Specimen Representative of the X-29a Forward-Swept Wing Aircraft PDF Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722804985
Category :
Languages : en
Pages : 26

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Book Description
The theory of anisotropic elasticity was used to evaluate the anisotropic stress concentration factors of a composite laminated plate containing a small circular hole. This advanced composite material was used to manufacture the X-29A forward swept wing. Observe that the usual isotropic material stress concentration factor is three. However, for composite material, it was found that the anisotropic stress concentration factor is no longer constant, and that the locations of maximum tangential stress points could shift by changing the fiber orientation with respect to the loading axis. The analysis showed that through the lamination process, the stress concentration factor could be drastically reduced, and therefore the structural performance could be improved. Both the mixture rule approach and the constant strain approach were used to calculate the stress concentration factor. The results predicted by the mixture rule approach were about 20 percent deviate from the experimental data. However, the results predicted by the constant strain approach matched the testing data very well. This showed the importance of the inplane shear effect on the evaluation of stress concentration factor for the X-29A composite plate. Yeh, Hsien-Yang Unspecified Center NGT-05020412; RTOP 533-02-51...

Stress Concentration Around Circular Hole in a Composite Material Specimen Representative of the X-29a Forward-Swept Wing Aircraft

Stress Concentration Around Circular Hole in a Composite Material Specimen Representative of the X-29a Forward-Swept Wing Aircraft PDF Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722804985
Category :
Languages : en
Pages : 26

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Book Description
The theory of anisotropic elasticity was used to evaluate the anisotropic stress concentration factors of a composite laminated plate containing a small circular hole. This advanced composite material was used to manufacture the X-29A forward swept wing. Observe that the usual isotropic material stress concentration factor is three. However, for composite material, it was found that the anisotropic stress concentration factor is no longer constant, and that the locations of maximum tangential stress points could shift by changing the fiber orientation with respect to the loading axis. The analysis showed that through the lamination process, the stress concentration factor could be drastically reduced, and therefore the structural performance could be improved. Both the mixture rule approach and the constant strain approach were used to calculate the stress concentration factor. The results predicted by the mixture rule approach were about 20 percent deviate from the experimental data. However, the results predicted by the constant strain approach matched the testing data very well. This showed the importance of the inplane shear effect on the evaluation of stress concentration factor for the X-29A composite plate. Yeh, Hsien-Yang Unspecified Center NGT-05020412; RTOP 533-02-51...

Temperature Effect on Stress Concentration Around Circular Hole in a Composite Material Specimen Representative of X-29a Forward-Swept Wing Aircraft

Temperature Effect on Stress Concentration Around Circular Hole in a Composite Material Specimen Representative of X-29a Forward-Swept Wing Aircraft PDF Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
ISBN: 9781729178423
Category : Science
Languages : en
Pages : 44

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Book Description
The theory of anisotropic elasticity was used to evaluate the anisotropic stress concentration factors of a composite laminated plate containing a small circular hole. This advanced composite was used to manufacture the X-29A forward-swept wing. It was found for composite material, that the anisotropic stress concentration is no longer a constant, and that the locations of maximum tangential stress points could shift by changing the fiber orientation with respect to the loading axis. The analysis showed that through the lamination process, the stress concentration factor could be reduced drastically, and therefore the structural performance could be improved. Both the mixture rule approach and the constant strain approach were used to calculate the stress concentration factor of room temperature. The results predicted by the mixture rule approach were about twenty percent deviate from the experimental data. However, the results predicted by the constant strain approach matched the testing data very well. This showed the importance of the inplane shear effect on the evaluation of the stress concentration factor for the X-29A composite plate. Yeh, Hsien-Yang Unspecified Center NGT-05-020-412; RTOP 533-02-5

Stress Concentration Around Circular Hole in a Composite Material Specimen Representative of the X-29A Forward-swept Wing Aircraft

Stress Concentration Around Circular Hole in a Composite Material Specimen Representative of the X-29A Forward-swept Wing Aircraft PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 26

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Scientific and Technical Aerospace Reports

Scientific and Technical Aerospace Reports PDF Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 984

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Temperature Effect on Stress Concentration Around Circular Hole in a Composite Material Specimen Representative of X-29A Forward-swept Wing Aircraft

Temperature Effect on Stress Concentration Around Circular Hole in a Composite Material Specimen Representative of X-29A Forward-swept Wing Aircraft PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 50

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Monthly Catalog of United States Government Publications

Monthly Catalog of United States Government Publications PDF Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1112

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Monthly Catalogue, United States Public Documents

Monthly Catalogue, United States Public Documents PDF Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1346

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Structural Characterization of Concrete Filled Fiber Reinforced Shells

Structural Characterization of Concrete Filled Fiber Reinforced Shells PDF Author: Andrew I. Davol
Publisher:
ISBN:
Category :
Languages : en
Pages : 554

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Fracture of Engineering Materials and Structures

Fracture of Engineering Materials and Structures PDF Author: S.H. Teoh
Publisher: Springer Science & Business Media
ISBN: 9401136505
Category : Technology & Engineering
Languages : en
Pages : 930

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Book Description
Recent advances in the field of fracture of engineering materials and structures have increasingly indicated its multidisciplinary nature. This area of research now involves scientists and engineers who work in materials science, applied mathematics and mechanics, and also computer scientists. The present volume, which contains the Proceedings of the Joint FEFG/lCF International Conference on Fracture of Engineering Materials and Structures held in Singapore from the 6th to 8th of August 1991, is a testimony of this multidisciplinary nature. This International Conference was the Second Symposium of the Far East Fracture Group (FEFG) and thus provided a unique opportunity for researchers and engineers in the Far East region to exchange and acquire knowledge of new advances and applications in fracture. The Conference was also the Inter-Quadrennial International Conference on Fracture (ICF) for 1991 and thus appealed to researchers in the international arena who wished to take advantage of this meeting to present their findings. The Conference has brought together over 130 participants from more than 24 countries, and they represented government and industrial research laboratories as well as academic institutions. It has thus achieved its objective of bringing together scientists and engineers with different backgrounds and perspectives but with . a common interest in new developments in the fracture of engineering materials and structures. This volume contains 4 keynote papers, 4 invited papers and 130 contributed papers.

Government Reports Annual Index

Government Reports Annual Index PDF Author:
Publisher:
ISBN:
Category : Research
Languages : en
Pages : 1428

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Book Description
Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.