| Studies of Woven Fabric Reinforced Composites for Automotive Applications, |
MAR 1982 |
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| Authors:
N. F. Dow; MATERIALS SCIENCES CORP SPRING HOUSE PA
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 | Characteristics of woven fabric fiberglass reinforced polyester composites were evaluated on the basis of their suitability for automotive applications. Stiffness, strength, fatigue performance, and moldability were assessed. A method of analysis was developed which indicates that the crimp in the woven yarns does not reduce the composite stiffness significantly from that provided by straight reinforcements. Data are presented which reveal that strengths commensurate with those of steels are possible. Finite ... |
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| STUDY OF THE APPLICATIONS OF FIBROUS COMPOSITES TO DEEP SUBMERGENCE SHELL STRUCTURES, |
AUG 1969 |
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| Authors:
R. W. Snyder; N. F. Dow; B. W. Rosen; GENERAL ELECTRIC CO PHILADELPHIA PA SPACE DIV
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| Small deflection buckling theory is applied to the efficiency study of laminated cylindrical shells subjected to external pressure. Limitations of a theory which neglects material coupling terms is determined. Guidelines are established for the efficient design of cylindrical shells. (Author) |
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| Studies of mechanics of filamentary composites. |
JUN 66 |
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| Authors:
N. F. Dow; B. W. Rosen; Z. Hashin; GENERAL ELECTRIC CO PHILADELPHIA PA
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| Studies are reported relating to the enhancement of understanding of the roles played by both binders and reinforcements in the attainment of advanced properties with fibrous composites. Previous analyses of properties and of efficiency of application are reviewed and extended. New analyses are developed for viscoelastic behavior and for three-dimensional reinforcement. Results of mechanical and photoelastic evaluations of transverse effectiveness of filamentary reinforcement are presented. (Author, modified). ANNOTATION: Studies of ... |
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| Enhancement of the Transverse Properties of Fibrous Composites, |
08 FEB 1966 |
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| Authors:
N. F. Dow
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| A method of analysis was developed for the determination of the elastic constants of a variety of configurations of three-dimensional filamentary reinforcement for plastics. This analysis is employed in preliminary evaluations of the effectiveness of several approaches to the enhancement of properties transverse to the filaments. For glass-reinforced epoxies, binders of increased stiffness, elliptical filaments, and triangular filaments are all shown capable of effecting improvements in transverse stiffnesses. For epoxies ... |
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| Influence of Constitutent Properties Upon the Structural Efficiency of Fibrous Composite Shells, |
05 APR 1965 |
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| Authors:
B. W. Rosen ; N. F. Dow
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| Results of evaluation of the influence of the constituent properties upon the structural efficiency of composite shells are reported. Loading intensities for launch vehicles are so low that elastic buckling governs the compression design for all but the most efficient stiffening configurations. Composites, reinforced in an isotropic laminate configuration by advanced filaments like boron and alumina are superior to the best metal shells for the most structurally efficient applications for ... |
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| EVALUATIONS OF FILAMENT-REINFORCED COMPOSITES FOR AEROSPACE STRUCTURAL APPLICATIONS. |
APR 65 |
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| Authors:
N. F. Dow; B. W. Rosen; GENERAL ELECTRIC CO SCHENECTADY N Y
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| Studies of the influence of constituent properties upon the performance ofstructural composites for aerospace applications are described. Previouselastic constant and tensile strength evluations are extended to broaden theirrange of applicability. An analysis of compressive strength is presented. These analyses are then used in a structural efficiency study of sandwichcylindrical shells subjected to axial load conditions appropriate to thelaunch vehicle problem. Promising areas for future development of compositematerials are indicated. (Author-PL) ... |
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| Mechanical properties of fibrous composites. |
APR 64 |
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| Authors:
B. W. Rosen; N. F. Dow; Z. Hashin; GENERAL ELECTRIC CO PHILADELPHIA PA
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| The studies described in this report are directed toward the attainment of advanced composite structural materials for aerospace vehicle applications. The approach is through the enhancement of understanding of the mechanics of deformation and failure of composites, and of the influence thereon of the properties of, and interactions between, the constituents, also the initial tasks of evaluating effective elastic constants and ultimate tensile strength of such materials are treated herein. ... |
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| Recommendations and evaluations of materials research areas of importance to missile and space vehicle structures. |
OCT 63 |
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| Authors:
N. F. Dow; J. B. Esgar; W. R. Micks; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON DC
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| Several requirements for research on new and improved structural materials are reviewed and discussed. Information about these requirements in terms of the description of the applications and advantages for improved materials is reviewed for high-temperature materials with oxidation resistance and ductility, low-temperature materials with ductility and impermeability, pressure vessel materials, and shielding materials. (Author). ANNOTATION: Recommendations and evaluations of materials research areas of importance to missile and space vehicle structures. ... |
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| New directions for structural reinforced plastics. |
DEC 60 |
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| Authors:
N. F. Dow; I. J. Gruntfest
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