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Environmental Effects On High Strain Rate Properties Of Graphite Epoxy Composite
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Book Synopsis Environmental Effects on High Strain Rate Properties of Graphite/Epoxy Composite by : IM. Daniel
Download or read book Environmental Effects on High Strain Rate Properties of Graphite/Epoxy Composite written by IM. Daniel and published by . This book was released on 1989 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unidirectional graphite/epoxy material was characterized at strain rates ranging from 5x 10-6 to 5 s-1 under various hygrothermal conditions. New techniques were successfully employed for measuring hygrothermal properties and for strain monitoring of "wet" specimens at high strain rates. A time-temperature-moisture equivalence principle was applied to obtain master curves for the longitudinal, transverse, and in-plane shear moduli and corresponding strengths and ultimate strains of the unidirectional graphite/epoxy. It was found that, except for the longitudinal modulus, which shows a slight increase with strain rate, temperature, and moisture, all other longitudinal properties in general remain unchanged. The transverse modulus increases with strain rate but decreases with increasing temperature and moisture content. All transverse and intralaminar shear properties decrease with increasing temperature and moisture content for a fixed strain rate. Transverse ultimate properties as a function of strain rate show a trend reversal with a local maximum. The in-plane shear strength increases noticeably with strain rate, whereas the ultimate shear strain decreases slightly. The time-temperature-moisture shift function is expressed as a function of two variables, allowing interchangeability of the three parameters, time, temperature, and moisture content.
Book Synopsis Environmental and Strain Rate Effects on Graphite/epoxy Composites by : Konstantinos Peimandis
Download or read book Environmental and Strain Rate Effects on Graphite/epoxy Composites written by Konstantinos Peimandis and published by . This book was released on 1991 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Temperature Effects on High Strain Rate Properties of Graphite/epoxy Composites by : G. Yaniv
Download or read book Temperature Effects on High Strain Rate Properties of Graphite/epoxy Composites written by G. Yaniv and published by . This book was released on 1991 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781724674265 Total Pages :378 pages Book Rating :4.6/5 (742 download)
Book Synopsis Temperature Effects on High Strain Rate Properties of Graphite/Epoxy Composites by : National Aeronautics and Space Administration (NASA)
Download or read book Temperature Effects on High Strain Rate Properties of Graphite/Epoxy Composites written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-04 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unidirectional graphite epoxy material (AS4/3501-6) was characterized at strain rates ranging from 5 x 10(exp 6) s(exp -1) to 5(exp -1), at room temperature and at 128 C. Results are presented in the form of stress-strain curves to failure. The longitudinal properties remain nearly unchanged with strain rate and temperature. The transverse modulus increases with strain rate but decreases with temperature. The transverse strength and transverse ultimate tensile strain have a positive rate sensitivity at low rates, which changes to negative at intermediate rates and returns to positive rate sensitivity at the highest rates tested. A temperature-time equivalence principle was applied and master curves were obtained for the transverse mechanical properties. The in-plane shear modulus and in-plane shear strength have a positive rate sensitivity. The ultimate intralaminar shear strain has a positive rate sensitivity at low rates, which changes to negative at high rates. At the elevated temperature of 128 C, the ultimate shear strain is 25 to 30 percent higher than the room temperature value, but its strain rate dependence is moderate. Yaniv, G. and Daniel, I. M. and Cokeing, S. and Martinez, G. M. Unspecified Center NASA-CR-189082, NAS 1.26:189082 IIT-5-54601; NAG3-423; RTOP 505-63-5B...
Book Synopsis Environmental and Strain Rate Effects on Graphite/epoxy Composites by : Konstantinos Peimanidis
Download or read book Environmental and Strain Rate Effects on Graphite/epoxy Composites written by Konstantinos Peimanidis and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Test Methods and Design Allowables for Fibrous Composites by : Christos C. Chamis
Download or read book Test Methods and Design Allowables for Fibrous Composites written by Christos C. Chamis and published by ASTM International. This book was released on 1989 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation Proceedings of a symposium on [title] held in Phoenix, AZ, Nov. 1986. Data and test methods on: extreme/hostile environments, design allowables, property/behavior specific testing. Annotation copyrighted by Book News, Inc., Portland, OR.
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 1977 with total page 1006 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High Strain Rate Properties of IM-7/977-3 Graphite/epoxy Composites by : Jeffrey R. Focht
Download or read book High Strain Rate Properties of IM-7/977-3 Graphite/epoxy Composites written by Jeffrey R. Focht and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High Temperature and Environmental Effects on Polymeric Composites by : Thomas S. Gates
Download or read book High Temperature and Environmental Effects on Polymeric Composites written by Thomas S. Gates and published by ASTM International. This book was released on 1997 with total page 276 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 1989 with total page 1148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis environmental effects on advanced composite materials by : Christian JL.
Download or read book environmental effects on advanced composite materials written by Christian JL. and published by ASTM International. This book was released on 1976 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Strain Rate, Temperature, and Humidity on Strength and Moduli of a Graphite/epoxy Composite by :
Download or read book Strain Rate, Temperature, and Humidity on Strength and Moduli of a Graphite/epoxy Composite written by and published by . This book was released on 1981 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Thermal and Environmental Exposure on the Mechanical Properties of Graphite/polyimide Composites by : M. P. Hanson
Download or read book Effects of Thermal and Environmental Exposure on the Mechanical Properties of Graphite/polyimide Composites written by M. P. Hanson and published by . This book was released on 1971 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Composites were exposed in circulating and static air environments up to 589 K for a maximum of 1000 hours. Composites of HT-S, HM-S, Thornel 50S, and Fortafil 5-Y fiber and a new addition type polyimide resin were laminated in a matched-die mold. Flexural strengths, flexural modulus, and interlaminar shear strengths were determined at 297, 533, and 598 K after various durations of exposure. Composite and fiber weight loss characteristics were determined by isothermal gravimetric analysis in air. Properties of composites exposed and tested at the environment temperatures were compared with those determined under short-term exposure. A new short beam interlaminar shear fixture is described. Environmental effects of long-term ambient temperature exposure on the elevated temperature mechanical properties of graphite/polyimide composites are presented.
Book Synopsis Environmental Effects on Composite Materials by : George S. Springer
Download or read book Environmental Effects on Composite Materials written by George S. Springer and published by . This book was released on 1981 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Strain Rate, Temperature, and Humidity Influences on Strength and Moduli of a Graphite/Epoxy Composite by :
Download or read book Strain Rate, Temperature, and Humidity Influences on Strength and Moduli of a Graphite/Epoxy Composite written by and published by . This book was released on 1981 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of an experimental study of the influence of strain rate, temperature, and humidity on the mechanical behavior of a graphite/epoxy fiber composite are presented. Three principal strengths (longitudinal, transverse, and shear) and four basic moduli (E1, E2, G12, and V12) of a unidirectional graphite/epoxy (T300/5208) composite were followed as a function of strain rate, temperature and humidity. Each test was performed at a constant tensile strain rate in an environmental chamber providing simultaneous temperature and humidity control. Prior to testing, specimens were given a moisture preconditioning treatment at 60 deg C. Values for the matrix-dominated moduli and strength were significantly influenced by both environmental and rate parameters, whereas the fiber-dominated moduli were not. However, the longitudinal strength was significantly influenced by temperature and moisture content. A qualitative explanation for these observations is presented. jg p26.
Book Synopsis Strain Rate Characterization of Unidirectional Graphite/Epoxy Composite by : IM. Daniel
Download or read book Strain Rate Characterization of Unidirectional Graphite/Epoxy Composite written by IM. Daniel and published by . This book was released on 1982 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unidirectional graphite/epoxy was characterized at various strain rates ranging from quasi-static to over 500 s-1. Properties were obtained by testing thin rings 10.16 cm (4 in.) in diameter, 2.54 cm (1 in.) wide, and 6 to 8 plies thick under internal pressure. Unidirectional 0, 90, and 10-deg off-axis rings were tested to obtain longitudinal, transverse, and in-plane shear properties. In the dynamic tests internal pressure was applied explosively through a liquid, and the pressure was measured with a calibrated steel ring. Strains in the calibration and specimen rings were recorded with a digital processing oscilloscope. The data were processed and the equation of motion solved numerically by a minicomputer attached to the oscilloscope. Results were obtained and plotted in the form of a dynamic stress-strain curve. Times to failure were as short as 30 ?s. The 0-deg properties which are governed by the fibers do not vary much with strain rate with only a moderate increase in modulus. The 90-deg properties show a marked increase in modulus and strength with strain rate. In-plane shear properties follow a similar trend, although less pronounced than transverse properties. In all cases ultimate strains do not vary much with strain rate.
Book Synopsis High Strain Rate Characterization of Graphite/epoxy Composites at Room and Elevated Temperatures Under Inplane Compression and Punch Shear Loading by : S. M. Waliul Islam
Download or read book High Strain Rate Characterization of Graphite/epoxy Composites at Room and Elevated Temperatures Under Inplane Compression and Punch Shear Loading written by S. M. Waliul Islam and published by . This book was released on 2004 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
