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Fatigue Delamination Onset Prediction In Unidirectional Tapered Laminates
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Book Synopsis Fatigue Delamination Onset Prediction in Unidirectional Tapered Laminates by : GB. Murri
Download or read book Fatigue Delamination Onset Prediction in Unidirectional Tapered Laminates written by GB. Murri and published by . This book was released on 1991 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tapered [0°] laminates of S2/CE9000 and S2/SP250 glass/epoxies, and two different specimen types of IM6/1827I, a graphite/epoxy with a toughened interleaf, were tested. Specimens were subjected to cyclic tension in a hydraulic load frame. The specimens usually showed some initial stable delaminations in the tapered region, but these did not affect the stiffness of the specimens, and loading was continued until the specimens either delaminated unstably, or reached 106 to 2 x 107 cycles with no unstable delamination. The final unstable delamination originated at the junction of the thin and tapered regions, and extended into both the tapered and thin regions.
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722392918 Total Pages :64 pages Book Rating :4.3/5 (929 download)
Book Synopsis Fatigue Delamination Onset Prediction in Tapered Composite Laminates by : National Aeronautics and Space Administration (NASA)
Download or read book Fatigue Delamination Onset Prediction in Tapered Composite Laminates written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-08 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tapered (0 deg) laminates of S2/CE9000 and S2/SP250 glass/epoxies, and IM6/1827I graphite/epoxy were tested in cyclic tension. The specimens usually showed some initial stable delaminations in the tapered region, but these did not affect the stiffness of the specimens, and loading was continued until the specimens either delaminated unstably, or reached 10(exp 6) to 2 x 10(exp 7) million cycles with no unstable delamination. The final unstable delamination originated at the junction of the thin and tapered regions. A finite-element model was developed for the tapered laminate with and without the initial stable delaminations observed in the tests. The analysis showed that for both cases the most likely place for an opening (Mode 1) delamination to originate is at the junction of the taper and thin regions. For each material type, the models were used to calculate the strain energy release rate, G, associated with delaminations originating at that junction and growing either into the thin region or tapered region. For the materials tested, cyclic G(sub Imax) values from DCB tests were used with the maximum strain energy release rates calculated from the finite-element analysis to predict the onset of unstable delamination at the junction as a function of fatigue cycles. The predictions were compared to experimental values of maximum cyclic load as a function of cycles to unstable delamination from fatigue tests in tapered laminates. For the IM6/1827I and S2/SP250 laminates, the predictions agreed very well with the test data. Predicted values for the S2/CE9000 were conservative compared to the test data. Murri, Gretchen Bostaph and Salpekar, Satish A. and Obrien, T. Kevin Langley Research Center...
Book Synopsis Fatigue Delamination Onset Prediction in Tapered Composite Laminates by :
Download or read book Fatigue Delamination Onset Prediction in Tapered Composite Laminates written by and published by . This book was released on 1989 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Composite Materials by : T. Kevin O'Brien
Download or read book Composite Materials written by T. Kevin O'Brien and published by ASTM International. This book was released on 1991 with total page 831 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis American Society of Composites, Ninth International Conference Proceedings by : Amer Society Composi
Download or read book American Society of Composites, Ninth International Conference Proceedings written by Amer Society Composi and published by CRC Press. This book was released on 1994-09-23 with total page 1338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis American Society for Composites by : Michael Hyer
Download or read book American Society for Composites written by Michael Hyer and published by DEStech Publications, Inc. This book was released on 2011-06-28 with total page 2760 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Tension Fatigue of Glass/epoxy and Graphite/epoxy Tapered Laminates by :
Download or read book Tension Fatigue of Glass/epoxy and Graphite/epoxy Tapered Laminates written by and published by . This book was released on 1990 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Composite Materials, Fatigue and Fracture by :
Download or read book Composite Materials, Fatigue and Fracture written by and published by . This book was released on 1989 with total page 850 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Composite Materials by : Roderick H. Martin
Download or read book Composite Materials written by Roderick H. Martin and published by ASTM International. This book was released on 1986 with total page 517 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis American Society of Composites, Tenth Technology Proceedings by : Amer Society Composi
Download or read book American Society of Composites, Tenth Technology Proceedings written by Amer Society Composi and published by CRC Press. This book was released on 1995-10-17 with total page 670 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conference proceedings from the American Society of Composites, Tenth Technology Proceedings: Composite Materials, Mechanics and Processing on October 18-20, 1995 at the Miramar Sheraton Hotel Santa Monica, California
Book Synopsis Delamination Failure in a Unidirectional Curved Composite Laminate by :
Download or read book Delamination Failure in a Unidirectional Curved Composite Laminate written by and published by . This book was released on 1990 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Delamination Onset in Polymeric Composite Laminates Under Thermal and Mechanical Loads by : RH. Martin
Download or read book Delamination Onset in Polymeric Composite Laminates Under Thermal and Mechanical Loads written by RH. Martin and published by . This book was released on 1993 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper describes a fracture mechanics damage methodology to predict edge delamination. The methodology accounts for residual thermal stresses, cyclic thermal stresses, and cyclic mechanical stresses. The modeling is based on the classical lamination theory and a sublaminate theory. The prediction methodology determines the strain energy release rate, G, at the edge of a laminate and compares it with the mode I fatigue and fracture toughness of the composite. To verify the methodology, isothermal static tests at 23°C, 125°C, and 175°C and tension-tension fatigue tests at 23°C and 175°C were conducted on laminates. The material system used was a carbon/bismaleimide, IM7/5260. Two quasi-isotropic lay-ups were used, [45/-45/0/90]s and [-45/45/90/0]s. Also, 24-ply unidirectional double cantilever beam specimens were tested to determine the fatigue and fracture toughness of the composite at different temperatures. Raising the temperature had the effect of decreasing the value of G at the edge for these lay-ups and also to lower the fatigue and fracture toughness of the composite. Experimentally, the static stress to edge delamination was not affected by temperature but the number of cycles to edge delamination decreased as temperature increased. The ply interface for delamination was well predicted. The predicted static stress and the number of cycles to edge delamination was generally conservative for the room temperature tests because of the large mode II G component present. For the elevated temperature tests the mode II component is smaller and the static stress and number of cycles to the onset to delamination was generally well predicted.
Book Synopsis Advances in Wind Turbine Blade Design and Materials by : Povl Brondsted
Download or read book Advances in Wind Turbine Blade Design and Materials written by Povl Brondsted and published by Woodhead Publishing. This book was released on 2023-01-14 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Wind Turbine Blade Design and Materials, Second Edition, builds on the thorough review of the design and functionality of wind turbine rotor blades and the requirements and challenges for composite materials used in both current and future designs of wind turbine blades. Reviews the design and functionality of wind turbine rotor blades Examines the requirements and challenges for composite materials used in both current and future designs of wind turbine blades Provides an invaluable reference for researchers and innovators in the field of wind
Book Synopsis Advances in wind turbine blade design and materials by : J.F. Mandell
Download or read book Advances in wind turbine blade design and materials written by J.F. Mandell and published by Elsevier Inc. Chapters. This book was released on 2013-10-31 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: This chapter explores the influence of resin and reinforcing fabric variations on the fatigue sensitivity for a wide range of typical blade laminates reported recently in the SNL/MSU/DOE database. Test results are presented for static and fatigue property variations with resin type, reinforcing fabric construction and weight, fiber content and laminate construction. Critical resin/fabric interactions and damage mechanisms are identified. The effects of resin and fiber type are also explored for material transitions at ply drops, where ply delamination is the dominant damage.
Book Synopsis Mechanics of Textile Composites Conference by :
Download or read book Mechanics of Textile Composites Conference written by and published by . This book was released on 1995 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fatigue Life Methodology for Tapered Composite Flexbeam Laminates by :
Download or read book Fatigue Life Methodology for Tapered Composite Flexbeam Laminates written by and published by . This book was released on 1997 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Engineering Design Reliability Handbook by : Efstratios Nikolaidis
Download or read book Engineering Design Reliability Handbook written by Efstratios Nikolaidis and published by CRC Press. This book was released on 2004-12-22 with total page 1216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Researchers in the engineering industry and academia are making important advances on reliability-based design and modeling of uncertainty when data is limited. Non deterministic approaches have enabled industries to save billions by reducing design and warranty costs and by improving quality. Considering the lack of comprehensive and defini
