Download or read book The Effect of Moisture on Carbon Fiber Reinforced Composites IV Prediction of Changes in the Elastic Behavior written by J. M. Augl and published by . This book was released on 1977 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: The changes in the elastic behavior of composites due to the reversible moisture absorption can be predicted when the matrix properties (E sub m and Nu sub m) have been determined as a function of temperature and moisture concentration. The composite is analyzed in terms of artificial delta-layers, analogous to laminated plate theory. If in addition the diffusion coefficient of moisture for the composite is known as a function of temperature one can predict the elastic behavior for any 'reasonable' environment as a function of time. (Author).
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1973 with total page 1064 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1986 with total page 1362 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Prediction and Verification of Moisture Effects on Carbon Fiber Epoxy Composites written by Joseph M. Augl and published by . This book was released on 1979 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Moisture has an effect on the elastic as well as on the strength properties of composites. In this work we have experimentally verified the prediction of changes in the longitudinal shear modules G sub 12 as a function of moisture uptake and temperature. The properties of the bulk resin (measured independently as a function of temperature and moisture concentration) were used for predicting the composite response by using the simple Halpin-Tsai equation of micromechanics. The excellent agreement between the predicted and observed values demonstrates the feasibility of predicting changes in 'reversible properties' of composite in a natural service environment as suggested in a previous report. This predictive scheme considered simultaneously the concepts of diffusion, environmental modeling, micromechanics, and a finite difference laminate theory. (Author).
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1962 with total page 1116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Moisture Effects on Carbon Fiber Epoxy Composites written by J. M. Augul and published by . This book was released on 1978 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ICCS20 20th International Conference on Composite Structures written by Nicholas Fantuzzi and published by Società Editrice Esculapio. This book was released on 2017-07-24 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Composite materials have aroused a great interest over the last few decades, as proven by the huge number of scientific papers and industrial progress. The increase in the use of composite structures in different engineering practices justify the present international meeting where researches from every part of the globe can share and discuss the recent advancements regarding the use of structural components within advanced applications such as buckling, vibrations, repair, reinforcements, concrete, composite laminated materials and more recent metamaterials. Studies about composite structures are truly multidisciplinary and the given contributions can help other researches and professional engineers in their own field. This Conference is suitable as a reference for engineers and scientists working in the professional field, in the industry and the academia and it gives the possibility to share recent advancements in different engineering practices to the outside world. This book aims to collect selected plenary and key-note lectures of this International Conference. For this reason, the establishment of this 20th edition of International Conference on Composite Structures has appeared appropriate to continue what has been begun during the previous editions. ICCS wants to be an occasion for many researchers from each part of the globe to meet and discuss about the recent advancements regarding the use of composite structures, sandwich panels, nanotechnology, bio-composites, delamination and fracture, experimental methods, manufacturing and other countless topics that have filled many sessions during this conference. As a proof of this event, which has taken place in Paris (France), selected plenary and key-note lectures have been collected in the present book.
Download or read book Government Reports Annual Index written by and published by . This book was released on 1988 with total page 1424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Moisture on Carbon Fiber Reinforced Composites written by Joseph M. Augl and published by . This book was released on 1977 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two methods are described to model the moisture uptake and internal distribution in fiber reinforced organic composites in real outdoor environments. Required for the calculations are the diffusion coefficients of the composites as a fraction of temperature and the moisture equilibrium concentration as a function of relative humidity. The effect of moisture barriers is briefly discussed. (Author).
Download or read book The Effect of Moisture on Carbon Fiber Reinforced Epoxy Composites I Diffusion written by Joseph M. Augl and published by . This book was released on 1976 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical models are suggested for calculating the reduced moisture diffusivities in unidirectional carbon fiber reinforced composites with hexagonal and tetragonal fiber alignment, parallel and perpendicular to the fiber direction, as a function of fiber volume fraction. The effective diffusion coefficients measured perpendicular to the fiber direction of 6 carbon fiber composites were determined as a function of temperature and relative humidity. The knowledge of the diffusion coefficients as a function of temperature, relative humidity, fiber volume fraction and composite geometry allow the prediction of the internal moisture distribution in a composite if the environment can be specified. A few simple examples have been illustrated. (Author).
Download or read book The Effect of Moisture on Carbon Fiber REinforced Epoxy Composites II Mechanical Property Changes written by and published by . This book was released on 1977 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: The changes in the matrix dominated flexural and short beam shear strengths of six carbon fiber composites were determined as a function of temperature and absorbed moisture. Moisture absorption led to a strength reduction between 10 and 40 percent, depending on temperature, but this reduction in strength leveled out after equilibrium was reached with the surrounding environment. It was concluded that this loss in strength is due to a reduction in resin modulus over a wide temperature range caused by the plasticizing effect of moisture on the matrix. This loss in resin modulus was reversible, and the original dry modulus-temperature-curve was regained after the absorbed moisture was removed; simultaneously the original composite dry strength was recovered. (Author).
Download or read book Corrosion Abstracts written by and published by . This book was released on 1985 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1978-06 with total page 1416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Composites Industry Abstracts written by and published by . This book was released on 1996 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications written by United States. National Bureau of Standards and published by . This book was released on 1986 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications of the National Institute of Standards and Technology Catalog written by National Institute of Standards and Technology (U.S.) and published by . This book was released on 1986 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NBS Special Publication written by and published by . This book was released on 1968 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
