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Keywords: fibers
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eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2022
ISBN: 978-0-8031-7727-7
... Steel with a patented active porcelain enamel coating was shown to improve the bond between the concrete and steel reinforcement as well as its corrosion resistance. This technology has been applied to steel fibers that reinforce concrete systems with significant improvements in performance...
eBook Chapter
Series: ASTM Manuals
Publisher: ASTM International
Published: 2022
ISBN: 978-0-8031-7134-3
... Metal-matrix composites (MMCs) are metals that are usually reinforced with ceramic fibers or particles to enhance or customize properties such as stiffness, strength, thermal conductivity, thermal expansion, friction, and wear resistance. MMCs, however, are generally more prone to corrosion...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2021
ISBN: 978-0-8031-7710-9
... environments. There is a poor understanding and increasing concern regarding the current exposure of the general Australian community to asbestos. One reason for this concern is a lack of recent data on asbestos fiber concentrations in different environments and under different conditions. Air and soil samples...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2000
ISBN-10: 0-8031-2855-X
ISBN: 978-0-8031-2855-2
... and quantitatively. Because of the capacity of these materials to retain high water contents, they are generally weak in their natural states but significant strength gain is achievable with consolidation. The presence of fibers induces both some anisotropy and internal reinforcement. These effects are reflected...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2000
ISBN-10: 0-8031-2869-X
ISBN: 978-0-8031-2869-9
... by sedimentation. An airflow chamber was built to observe spore redispersal patterns from contaminated fabrics. A gravimetric aerosol monitor was used to record the dispersal patterns over time. The most important factors in spore release behavior were fiber surface morphology, moisture content and available fiber...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1997
ISBN-10: 0-8031-2409-0
ISBN: 978-0-8031-2409-7
... We have studied radiative transfer through insulating materials made of fibres and slugs (modeled respectively as infinite cylinders and spheres) at elevated temperatures. The same theoretical analysis is used for both fibers and spheres: Kerker-Mie theory is applied to determine the radiative...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1990
ISBN-10: 0-8031-1298-X
ISBN: 978-0-8031-1298-8
... Procedures for quantifying the orientation of fibers composing nonwoven geotextiles are presented. These procedures are based upon measurements made at the microscopic scale. Methods for experimentally determining the orientation of fibers within a nonwoven geotextile are presented...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1990
ISBN-10: 0-8031-1385-4
ISBN: 978-0-8031-1385-5
... Metal matrix composites (Al-2Mg) reinforced with 10% by volume “Saffil” fibers were manufactured by a pressure infiltration technique. The initiation and growth of fatigue cracks in these composites were investigated by two methods. Fatigue crack initiation and early crack growth were studied...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1989
ISBN-10: 0-8031-1250-5
ISBN: 978-0-8031-1250-6
... The principal microstructural sources of toughening are reviewed, with emphasis on comparisons between theory and experiment. Process zone mechanisms, such as transformation and microcracking, as well as bridging mechanisms induced by either ductile networks or fiber/whiskers are afforded...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1988
ISBN-10: 0-8031-1177-0
ISBN: 978-0-8031-1177-6
...) and the condensed liquids products were examined directly on the PVC membrane by FTIR in the internal mode. For that purpose, several types of synthetic fibers have been selected: polyvinyl alcohol, polyacrylonitrile, polyaramids, and polyolefins. The decomposition products from the combustion of the organic...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1984
ISBN-10: 0-8031-0218-6
ISBN: 978-0-8031-0218-7
... by distinct, predominant, early subcritical damage conditions. This secondary and subsequent damage development was examined in relation to known, predictable beginning state. Of particular emphasis in each case was the role of this developing damage state in the fracture of fibers in the 0-deg plies. Damage...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1980
ISBN-10: 0-8031-0325-5
ISBN: 978-0-8031-0325-2
.... durability adhesives surface-coatings concrete composites fibers building materials W. H. GuW andL. H. Everett' Durability of Some Common Building Materials REFERENCE: Gutt, W. H. and Everett, L. H., "Durability of Some Common Building Materials," Durability of Building Materials and Components...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1979
ISBN-10: 0-8031-4495-4
ISBN: 978-0-8031-4495-8
... This paper examines several aspects of fiber and composite testing, including: fiber tension test methods, the three-point loading flexural test, and special problems related to test methods and properties of fabric-reinforced composites. Some major cause of property variability in hand lay-up...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1977
ISBN-10: 0-8031-4490-3
ISBN: 978-0-8031-4490-3
... A method of measuring the longitudinal residual stress distribution in boron fibers is presented. The residual stresses in commercial chemical vapor deposited boron on tungsten fibers of 102, 142, and 203 µm (4, 5.6, and 8 mil) diameters were determined. Results for the three sizes show...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1975
ISBN-10: 0-8031-0346-8
ISBN: 978-0-8031-0346-7
... and analyzing the results using composite mechanics. Results from the investigation show that the contributions to nonlinear behavior are due to: premature random fiber breaks where the ply orientation angle (POA) is small relative to the load direction, ply relative rotation (PRR) at intermediate values...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1975
ISBN-10: 0-8031-0346-8
ISBN: 978-0-8031-0346-7
... of the composite. composite materials fibers aluminum beryllium boron copper tungsten reinforcement (structures) fatigue (materials) fatigue limit cyclic loads G. J. Dvorak 1 and J. Q. Tarn i Fatigue and Shakedown in Metal Matrix Composites REFERENCE: Dvorak, G. J. and Tam, J. Q., "Fatigue...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1975
ISBN-10: 0-8031-0346-8
ISBN: 978-0-8031-0346-7
... The fatigue failure mechanisms in a unidirectional glass fiber-epoxy material were studied. Specimens were made by filament winding the glass fiber roving and vacuum impregnating with a low viscosity room temperature curing resin. The fatigue response could be divided into three distinct life...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1975
ISBN-10: 0-8031-0346-8
ISBN: 978-0-8031-0346-7
... are presented and compared to facilitate use by design and materials engineers. composite materials fibers boron aluminum titanium J. L. Christian i Axial Fatigue Properties of Metal Matrix Composites REFERENCE: Christian, J. L., "Axial Fatigue Properties of Metal Matrix Composites," Fatigue...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1975
ISBN-10: 0-8031-0309-3
ISBN: 978-0-8031-0309-2
... A new multistage tension testing procedure is developed that enables the statistical estimation of the flaw strength spectra of high-modulus fibers. The mathematical development of the procedure assumes the compound Poisson process model in distance to represent the probabilistic aspects of flaw...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1975
ISBN-10: 0-8031-0309-3
ISBN: 978-0-8031-0309-2
... To examine the time-temperature dependence of fiber-reinforced composite materials, forced vibration experiments have been conducted. After suitable statistical smoothing techniques have been applied to the raw data, the complex moduli (storage and loss moduli) of boron-epoxy and graphite-epoxy...