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Keywords: laminates
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eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2000
ISBN-10: 0-8031-2869-X
ISBN: 978-0-8031-2869-9
... Microporous films used to reinforce barrier fabrics were tested for permeability to synthetic blood and comfort parameters. One film was tested as a finished product, laminated to a nonwoven substrate and treated to reduce surface wettability. Another film was tested with a range of adhesive...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2000
ISBN-10: 0-8031-2869-X
ISBN: 978-0-8031-2869-9
... on pressures obtained by viral assay. Barrier fabrics microporous films laminates surgical gown liquid penetration Marian G. McCord, 1A. Shawn Deaton, 1Roger L. Barker ~ Liquid Penetration Pressures for Fabrics Tested in Compression Reference: McCord, M. G., Deaton, A. S., Barker, R. L., "Liquid...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1997
ISBN-10: 0-8031-2411-2
ISBN: 978-0-8031-2411-0
... To assess the long-term durability of advanced composite joints, the localized creep response of a quasi-isotropic ([45/0/–45/90] 2s ), graphite fiber/polymer matrix (G40-800/5260) composite laminate subjected to bolt-bearing loads at ambient and elevated temperatures was investigated. Monotonic...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1997
ISBN-10: 0-8031-2411-2
ISBN: 978-0-8031-2411-0
... Use of the compact tension, C(T), specimens in laminated composites testing is investigated by considering two examples. A new computational methodology that scales up constituent material properties, stress, and strain limits to the structure level is used to evaluate damage propagation stages...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1997
ISBN-10: 0-8031-2402-3
ISBN: 978-0-8031-2402-8
... An automated apparatus to determine the steady-state and transient water vapor permeation behavior of fabrics and semipermeable laminates is described. Typical test results for representative types of fabrics and semipermeable membrane laminates are shown, as well as correlations between...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1996
ISBN-10: 0-8031-2039-7
ISBN: 978-0-8031-2039-6
... [0] 4 , [90] 4 , [0/90] s , and [0/±45/90] s laminates. Sustained load creep tests were conducted under cold grip conditions at 650, 760, and 815°C at various stress levels. The creep response for [90] 4 , [0/90] s , and [0/±45/90] s layups exhibited generic creep curves with three distinct stages...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1996
ISBN-10: 0-8031-2039-7
ISBN: 978-0-8031-2039-6
... as for stresses and strains in two isothermal and two thermomechanical fatigue test cases. For each case, the laminate response of the models is compared to experimental behavior, while the responses of the constituents are compared among the models. The capability of each model to predict frequency effects...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1996
ISBN-10: 0-8031-2039-7
ISBN: 978-0-8031-2039-6
... Micromechanical modeling is employed to evaluate the stresses and strains in laminated composite plates reinforced by elastic fibers in a thermo-viscoplastic matrix. Loading is limited to uniform in-plane stresses and to uniform changes in temperature. The local fields and macroscopic response...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1994
ISBN-10: 0-8031-1499-0
ISBN: 978-0-8031-1499-9
... conclusions are drawn as to the preferred plug contour for reducing the end effect. composite materials thick composites filament wound composites pressure vessels cylindrical shells laminates analyzing compression hydrostatic pressure orthotropic elasticity shear deflection bending stresses...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1993
ISBN-10: 0-8031-1866-X
ISBN: 978-0-8031-1866-9
... Fiber reinforced aluminum laminates are able to retard fatigue crack growth by transfer of load from cracked aluminum layers to intact fibers. The resulting crack bridging effect leads to superior laminate fatigue crack growth response compared to that of monolithic aluminum. In real laminate...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1993
ISBN-10: 0-8031-1861-9
ISBN: 978-0-8031-1861-4
... components such as laminates, and its impedance response is calculated as a function of defect dimensions, solution resistivity, and exposed planar surface area. Model laminates were constructed with known rectangular defect dimensions and their measured impedance spectra provided experimental verification...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1993
ISBN-10: 0-8031-1498-2
ISBN: 978-0-8031-1498-2
... The effect of specimen size upon the response and strength of ± 45° angle-ply laminates has been investigated for two graphite fiber-reinforced plastic systems and several stacking sequences. The first material system was an epoxy-based system, AS4 fibers in 3502 epoxy, and the second...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1992
ISBN-10: 0-8031-1495-8
ISBN: 978-0-8031-1495-1
... Some recent developments on integrated damping mechanics for unidirectional composites, laminates, and composite structures are reviewed. Simplified damping micromechanics relate the damping of on-axis and off-axis composites to constituent properties, fiber volume ratio, fiber orientation...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1992
ISBN-10: 0-8031-1426-5
ISBN: 978-0-8031-1426-5
... This paper presents the development of a test system and associated experimental procedure for evaluating in-plane biaxial compressive deformation and failure of fiber composite laminates. A description of the test system and the design of fixtures and specimen are given. Critical buckling...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1992
ISBN-10: 0-8031-1426-5
ISBN: 978-0-8031-1426-5
... A new method of predicting the strength of cross-plied fibrous composite laminates is based on expressing the classical maximum-shear-stress failure criterion for ductile metals in terms of strains. Starting with such a formulation for classical isotropic materials, the derivation is extended...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1992
ISBN-10: 0-8031-1426-5
ISBN: 978-0-8031-1426-5
... An experimental and analytical study was conducted on the influence of matrix cracking on delamination in (+ 15/90 n /-15) s glass-epoxy laminates subjected to monotonically increasing tension loads. Four different layups are examined with the number of symmetric 90° layers varying from 0...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1992
ISBN-10: 0-8031-1426-5
ISBN: 978-0-8031-1426-5
... response and strength capability. The section stiffness of the patch material is kept constant in the direction of the first principal stress, as the number of plies is decreased. The average modulus of the patch adherend is increased by reorienting the plies in the laminate. This is done to demonstrate...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1992
ISBN-10: 0-8031-1440-0
ISBN: 978-0-8031-1440-1
... A simple analytical method using a sublaminate approach is introduced to analyze unidirectional and cross-ply laminates under torsion loading. Interlaminar stresses and total energy release rate are evaluated based upon a displacement field that includes shear deformation. Closed-form...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1991
ISBN-10: 0-8031-1419-2
ISBN: 978-0-8031-1419-7
... the load versus CSD diagram by using the analytical relationship between crack length and CSD compliance. A computer aided testing (CAT) system has been developed for continuous measurement of the crack length and fracture toughness. Fracture behavior of a unidirectional carbon/epoxy laminate has been...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1990
ISBN-10: 0-8031-1287-4
ISBN: 978-0-8031-1287-2
... Composite bars of rectangular cross sections are loaded in torsion to determine the principal shear moduli and interlaminar strengths. The use of rectangular cross sections greatly simplifies the fabrication of specimens. In [0], [90], and cross-plied laminates, torsional rigidity depends only...