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The Effect Of Frequency On The Fatigue Damage Of Boron Aluminum Fiber Reinforced Composite Materials
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Book Synopsis The Effect of Frequency on the Fatigue Damage of Boron/Aluminum Fiber Reinforced Composite Materials by : R. S. Williams
Download or read book The Effect of Frequency on the Fatigue Damage of Boron/Aluminum Fiber Reinforced Composite Materials written by R. S. Williams and published by . This book was released on 1974 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of strain-controlled axial fatigue tests on boron/aluminum fiber reinforced composite materials are presented in the second of a series of reports detailing such results for a large number of fatigue tests run on boron/epoxy and boron/aluminum. Data from a series of undamaged (virgin) cyclic stress-strain tests at various frequencies and a series of constant strain amplitude fatigue tests at various frequencies is presented and discussed at length. Complete specimen and testing specifications are included. A difinitive relationship between damage and cyclic frequency is established for this material system, as was the case for the boron/epoxy system with substantially different material properties reported in the first report of this series.
Book Synopsis The Effect of Frequency and Strain Amplitude on the Fatigue Damage of Boron/Epoxy Fiber-Reinforced Composite Materials by : R. S. Williams
Download or read book The Effect of Frequency and Strain Amplitude on the Fatigue Damage of Boron/Epoxy Fiber-Reinforced Composite Materials written by R. S. Williams and published by . This book was released on 1975 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of strain-controlled axial fatigue tests on boron/epoxy fiber reinforced composite materials are presented in the first of a series of reports detailing such results for a large number of fatigue tests run on boron/epoxy and boron/aluminum. The report contains a complete discussion of present experimental methods used in conjunction with this research program. Data from a series of undamaged (virgin) cyclic stress/strain tests at various frequencies, a series of strain controlled fatigue tests at 30Hz cyclic loading at several strain amplitudes and a series of constant strain amplitude fatigue tests at various frequencies (including all specimen and testing specifications) is presented and discussed at length. The effect of cyclic frequency on fatigue damage development is discussed and other pertinent trends are indicated.
Book Synopsis Mechanisms of Fatigue Damage in Boron/aluminum Composites by :
Download or read book Mechanisms of Fatigue Damage in Boron/aluminum Composites written by and published by . This book was released on 1980 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis ERDA Energy Research Abstracts by : United States. Energy Research and Development Administration
Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration and published by . This book was released on 1976-05 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fatigue Damage Mechanisms in Fiber Reinforced Composite Materials Including the Effect of Cyclic Loading Frequency by : Richard Scott Williams
Download or read book Fatigue Damage Mechanisms in Fiber Reinforced Composite Materials Including the Effect of Cyclic Loading Frequency written by Richard Scott Williams and published by . This book was released on 1975 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis ERDA Research Abstracts by : United States. Energy Research and Development Administration
Download or read book ERDA Research Abstracts written by United States. Energy Research and Development Administration and published by . This book was released on 1976 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. Energy Research and Development Administration. Technical Information Center Publisher : ISBN 13 : Total Pages :1680 pages Book Rating :4.3/5 (129 download)
Book Synopsis ERDA Energy Research Abstracts by : United States. Energy Research and Development Administration. Technical Information Center
Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration. Technical Information Center and published by . This book was released on 1977 with total page 1680 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fracture Analysis of Fatigue Damage Mechanisms in Fiber Reinforced Composite Materials Using Scanning Electron Microscopy by : R. S. Williams
Download or read book Fracture Analysis of Fatigue Damage Mechanisms in Fiber Reinforced Composite Materials Using Scanning Electron Microscopy written by R. S. Williams and published by . This book was released on 1974 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: A variety of experimental and analytical methods have been used in attempting to characterize the fatigue damage processes in fiber reinforced composite materials. There has, however, been a distinct lack of SEM fractography applied to this area. In this report, composite SEM fractographs (approx. 70 - 80x) of two composite material systems (boron/epoxy and boron/aluminum) having the same fibers, layup and geometry, but drastically different matrix materials, are presented and discussed in detail. Both high and low frequency strain controlled fatigue tests and static test fractures are examined. Distinct differences between static and fatigue damage, and high and low frequency fatigue damage were observed. These various damage modes are detailed and summarized in several tables. A physical model describing the fracture process in these materials is presented by means of a flow chart. This model considers the cases of: static or fatigue loading, high or low cycling frequency, and weak or strong interface behavior.
Download or read book ERDA Energy Research Abstracts written by and published by . This book was released on 1977 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fatigue of Filamentary Composite Materials by : K. L Reifsnider
Download or read book Fatigue of Filamentary Composite Materials written by K. L Reifsnider and published by ASTM International. This book was released on 1977 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Composite Materials written by S. W. Tsai and published by ASTM International. This book was released on 1979 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Frequency Effects on a Stiffness-Based Fatigue Failure Criterion in Flawed Composite Specimens by : WW. Stinchcomb
Download or read book Frequency Effects on a Stiffness-Based Fatigue Failure Criterion in Flawed Composite Specimens written by WW. Stinchcomb and published by . This book was released on 1977 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: An important result of our investigations of the fatigue response of composite materials has been the identification and characterization of the effect of frequency of cycled loads (or strain). Frequency has been found to significantly influence the fatigue response of boron/epoxy and boron/aluminum plate specimens with a center hole. A large data base for strain-controlled testing of boron/epoxy and boron/aluminum at different frequencies has been reported earlier. More recently, we have extended the data base to include load-controlled test results for boron/epoxy and boron/aluminum using stiffness change as the primary damage parameter, and allowable stiffness change as a failure criterion. In general, the data show that low-frequency fatigue loading produces more concentrated, local, hole-related damage with corresponding greater specimen stiffness reduction. In contrast, high-frequency loading produces more dispersed damage with more axial micro-structure-related damage and less stiffness reduction. Since these results are true for two widely different materials and different testing conditions, the authors believe that these effects are representative of the mechanics of the phenomenon, and do not represent isolated effects. It appears that frequency effects can be expected in many fiberous composites and that they are large enough to be of significant consequence in many engineering applications.
Book Synopsis Government reports annual index by :
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fatigue Damage in Boron-Aluminum by : AR. Bunsell
Download or read book Fatigue Damage in Boron-Aluminum written by AR. Bunsell and published by . This book was released on 1979 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fatigue behavior of three boron fiber reinforced aluminum alloys (1200, 6061.T6M, 2024.T4) has been examined in circular bending and the mechanisms which lead to their progressive deterioration studied. In B-1200, the broken fibers are isolated by crack growth in the matrix parallel to the fibers and originating at the fiber failures. In B-6061.T6M, the broken fibers initiate matrix cracks which are normal to the fibers and which pass around intact fibers without producing their failure. In B-2024.T4, a broken fiber can lead to the failure of the neighboring fibers because of load transfer by the matrix; when this failure is not immediate, it can occur because of matrix cyclic work hardening leading to an increase in transferred load. The matrix bridging two fibers subsequently fails in fatigue after their earlier failure.
Download or read book Government Reports Index written by and published by . This book was released on 1975 with total page 1014 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Frequency on the Mechanical Response of Two Composite Materials to Fatigue Loads by : LA. Marcus
Download or read book Effects of Frequency on the Mechanical Response of Two Composite Materials to Fatigue Loads written by LA. Marcus and published by . This book was released on 1975 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new class of mechanical response characteristics in composite materials is reported. These characteristics were found to come about because of a nonlinear dependence of the fatigue response of biasply boron-aluminum and boron-epoxy flawed plate specimens on the frequency of load (or strain) oscillation. This nonlinear frequency effect was found to alter such properties as fatigue strength, stiffness, residual strength, and energy dissipation by as much as an order of magnitude. Several conceptual interpretations are developed and compared with data correlations.
