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Keywords: matrix cracking
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eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 2004
ISBN-10: 0-8031-3483-5
ISBN: 978-0-8031-3483-6
... matrix cracking Hui Bau 1 Damage and Failure Mechanisms in Composite Bolted Joints REFERENCE: Bau, H., "Damage and Failure Mechanisms in Composite Bolted Joints," doining and Repair of Composite Structures, ASTM STP 1455, K. T. Kedward and H. Kim, Eds., ASTM International, West Conshohocken, PA, 2004...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 2000
ISBN-10: 0-8031-2872-X
ISBN: 978-0-8031-2872-9
... rupture modeling matrix cracking environmental effects James A. DiCarloI and Hee Mann Ytm2 Fiber Test Development for Ceramic Composite Thermomechanical Properties Reference: DiCarlo, J. A. and Yun, H. M., "Fiber Test Development for Ceramic Composite Thermomechanical Properties," Mechanical, Thermal...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 2000
ISBN-10: 0-8031-2872-X
ISBN: 978-0-8031-2872-9
... of the most severe pitfalls for these types of materials occurs at intermediate temperatures, 600 to 1000°C. Environmental access to load-bearing fibers occurs through matrix cracks that are bridged by load-bearing fibers. The rate at which these composites lose the ability to carry load is partially...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 1997
ISBN-10: 0-8031-2473-2
ISBN: 978-0-8031-2473-8
... Matrix cracking, interfacial debonding and sliding, fiber breakage and fiber pullout induced loss of stiffness, inelastic strains, hysteresis loops, and crack closure. These mechanisms are analyzed within the framework of continuum mechanics through the introduction of internal variables. Two...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 1996
ISBN-10: 0-8031-2039-7
ISBN: 978-0-8031-2039-6
... approach. A finite element analysis verified the prevailing assumptions made in the formulation of this model. Damage growth, namely, fiber-bridged matrix crack growth, was evaluated using a fiber bridging (FB) model that accounts for thermal residual stresses. This model combines continuum fracture...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 1994
ISBN-10: 0-8031-1989-5
ISBN: 978-0-8031-1989-5
... A real-time acousto-ultrasonic (AU) nondestructive evaluation (NDE) technique was developed to study the damage mechanisms of unidirectional and cross-ply SiC/CAS ceramic composites. Real-time AU was found to be very sensitive in detecting the stress levels at which the onset of matrix cracking...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 1993
ISBN-10: 0-8031-1498-2
ISBN: 978-0-8031-1498-2
... An investigation was performed to study the delamination propagation induced by matrix cracking in graphite/epoxy laminated composite beams subjected to transverse concentrated loading. The major focus of the study was to fundamentally understand the interaction between matrix cracking...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 1992
ISBN-10: 0-8031-1444-3
ISBN: 978-0-8031-1444-9
... micro-cracking level, long-life (>10 6 cycles) maximum cyclic stress, loss of modulus during cyclic loading tests, and the influence of temperature and environment. ceramic matrix composites damage accumulation matrix cracking mechanical testing fatigue (materials) advanced materials...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 1991
ISBN-10: 0-8031-1419-2
ISBN: 978-0-8031-1419-7
... The effect of the stress-free edge on the growth of local delaminations initiating from a matrix crack in a composite laminate is investigated using a three-dimensional finite element analysis. Two glass epoxy layups, (0 2 /90 4 ) s and (±45/90 4 ) s , were modeled with a matrix crack...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 1990
ISBN-10: 0-8031-1287-4
ISBN: 978-0-8031-1287-2
... laminate incremental strain test test method graphite/epoxy damage viscoelastic interlayer strength load relaxation damage tolerance first-ply failure matrix cracking acoustic emission characteristic damage state durability strain rate R. E. Swain, 1 K. L. Reifsnider, 'and J. Vittoser...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 1989
ISBN-10: 0-8031-1190-8
ISBN: 978-0-8031-1190-5
... Fatigue damage development in cross-ply laminates consists of transverse matrix cracking followed by longitudinal matrix cracking, local delaminations at crack intersections, and ultimately longitudinal fiber breakage of the load-carrying plies. Ultimate failure is determined by the manner...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 1989
ISBN-10: 0-8031-1190-8
ISBN: 978-0-8031-1190-5
... in growth rates. However, block loading tests, where an overload was applied at regular intervals, resulted in growth rates five times higher than a linear sum of the individual growth rates. Compliance changes were measured and correlated with the extent of delamination. The associated matrix cracking...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 1989
ISBN-10: 0-8031-1270-X
ISBN: 978-0-8031-1270-4
.... These four types of damage will be discussed and illustrated by examples with the emphasis on the fatigue of unnotched laminates. metal matrix composites continuous fiber boron fibers silicon-carbide fibers FP fibers aluminum titanium fatigue matrix cracking fiber/matrix interface W. S...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 1988
ISBN-10: 0-8031-0980-6
ISBN: 978-0-8031-0980-3
... Experimental evidence has shown that significant stiffness loss occurs in graphite/epoxy laminates when matrix cracking and interply delaminations exist. Therefore, a cumulative damage model for predicting stiffness loss in graphite/epoxy laminates is proposed herein by applying...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 1987
ISBN-10: 0-8031-0934-2
ISBN: 978-0-8031-0934-6
... to delamination grwoth G R can be explained best in terms of the associated matrix cracking, which is observed under both static and fatigue loading. Using results from a [±30/±30/90/9¯0] s T300-5208 and a [45/0/−45/90] s XAS-914 graphite-epoxy laminate, separate power law correlations between the edge...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 1982
ISBN-10: 0-8031-0695-5
ISBN: 978-0-8031-0695-6
... Matrix crack initiation and accumulation have been characterized in SMC R25 and R50 and injection-molded reinforced thermoplastics under static and fatigue loading. The following topics are presented and discussed: ( 1 ) crack initiation S-N curves of composites, ( 2 ) crack density...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 1982
ISBN-10: 0-8031-0695-5
ISBN: 978-0-8031-0695-6
... failure matrix cracking delamination H. T. Hahn^ and D. G. Hwang^ Failure Characterization of a Graphite/Epoxy Laminate Through Proof Testing REFERENCE: Hahn, H. T. and Hwang, D. G.. "Failure Characterization of a Graphite/Epoxy Laminate Through Proof Testing," Composite Materials: Testing and Design...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 1979
ISBN-10: 0-8031-4495-4
ISBN: 978-0-8031-4495-8
... 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...