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Keywords: mixed mode
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eBook Chapter
Book: Advances in Accelerated Testing and Predictive Methods in Creep, Fatigue, and Environmental Cracking
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2023
ISBN: 978-0-8031-7733-8
... Because there is no codified standard for a mixed-mode fracture test, this study, by summing up previous works and investigating their properties, attempts to provide the requirements for standardization of mixed-mode fracture testing. Utilizing the loading device proposed in the present paper...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2003
ISBN-10: 0-8031-2899-1
ISBN: 978-0-8031-2899-6
... at the crack tip for Mode I; one for mixed mode. These lines are the basis for the new slip line fracture mechanics, SLFM2,1. In SLFM2, the crack tip driving parameters CTDP are the angle of, and the normal stress and slip displacement across, the two slip lines. The response functions of the CTDPs can...
eBook Chapter
Book: Applications of Automation Technology in Fatigue and Fracture Testing and Analysis: Fourth Volume
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2002
ISBN-10: 0-8031-2890-8
ISBN: 978-0-8031-2890-3
... and Application in Real-time (SMART) system has been proposed, and work on this system has been ongoing. fatigue-crack growth mixed mode deformation mapping image analysis closure crack opening displacement crack sliding displacement David Alan Johnson1 Automated Deformation Mapping in Fatigue...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1999
ISBN-10: 0-8031-2602-6
ISBN: 978-0-8031-2602-2
... an increasingly influential role as the crack tip approaches the first grain boundary. crystal plasticity high cycle fatigue microstructure small cracks mixed mode Valerie Bennett 1 and David L. McDowell t Polycrystal Orientation Effects on Microslip and Mixed-Mode Behavior of Microstructurally Small...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1999
ISBN-10: 0-8031-2602-6
ISBN: 978-0-8031-2602-2
... Fatigue crack growth behavior was studied on C(T) and SE(T) specimens from Al-Cu alloy 2014 using specially-designed load sequences. The experiments were organized to induce microscopic mixed-mode fatigue crack growth while at the same time reducing or eliminating fatigue crack closure...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1999
ISBN-10: 0-8031-2602-6
ISBN: 978-0-8031-2602-2
... significant resistance to self-similar crack growth from the machined flaw. In contrast, self-similar crack growth was achieved with relative ease for loading angles, θ ≠0° (mixed mode). In the mixed mode tests with K I > 0, the crack growth rate was 10 to 50 times higher than that under Mode I loading...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1995
ISBN-10: 0-8031-2012-5
ISBN: 978-0-8031-2012-9
... The objective of this work is to evaluate the interlaminar fracture toughness, in terms of the total critical strain energy release rate ( G Tc ), for unidirectional glass/epoxy composites under mixed Mode I + II loading. Several bending tests proposed in the literature, such as the DCB, MMF...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1995
ISBN-10: 0-8031-1882-1
ISBN: 978-0-8031-1882-9
... This paper deals with the problem of a plane strain crack growing steadily and quasi-statically along the interface between a brittle and a ductile material, under small scale yielding and mixed-mode conditions. Previously determined asymptotic near-tip solutions are used in conjunction...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1992
ISBN-10: 0-8031-1423-0
ISBN: 978-0-8031-1423-4
... are discussed. small crack mixed mode multiaxial fatigue biaxial fatigue fatigue crack growth Satish C. Reddy I and Ali Fatemi 2 Small Crack Growth in Multiaxial Fatigue REFERENCE: Reddy, S. C. and Fatemi, A., "Small Crack Growth in Multiaxial Fatigue," Advances in Fatigue Lifetime Predictive...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1989
ISBN-10: 0-8031-1190-8
ISBN: 978-0-8031-1190-5
... The fatigue crack growth rates of delaminations under mixed mode (I and II) loading conditions were investigated. Double cracked-lap-shear specimens were used to obtain da/dN versus Δ G data for AS4/3501-6 graphite/epoxy. This, together with previously reported results for pure mode I...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1989
ISBN-10: 0-8031-1190-8
ISBN: 978-0-8031-1190-5
... specimen were tested: end-notched flexure (ENF), end-notched cantilever beam (ENCB), and cantilever beam enclosed notch (CBEN). The latter was developed specifically for this study and is described in detail. A mixed mode specimen is also described. Results from both static and fatigue tests are discussed...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1989
ISBN-10: 0-8031-1250-5
ISBN: 978-0-8031-1250-6
...-intensity values for high-frequency (21 kHz) fatigue loading is given in comparison with conventional loading. mixed mode combined mode multiaxial loading Mode II loading near-threshold fatigue crack growth crack closure ultrasonic fatigue Stefanie E. Stanzl, 1 Maximilian Czegley, 2 Herwig R...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1988
ISBN-10: 0-8031-0972-5
ISBN: 978-0-8031-0972-8
..., and, in the neighborhood of the reentrant corner, has stress-free boundaries. The methods described herein can be adapted to cases without such restrictions. finite-element methods p -extension fracture mechanics elasticity stress-intensity factors mixed mode extraction methods convergence error estimate...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1988
ISBN-10: 0-8031-0972-5
ISBN: 978-0-8031-0972-8
... results using empirically derived K values are available in the literature. This paper presents a methodology for the mixed-mode K solutions for a surface crack at the weld toe of tubular joints. Example solutions were developed for tubular X-joints under brace tension and in-plane bending using three...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1988
ISBN-10: 0-8031-0980-6
ISBN: 978-0-8031-0980-3
... A computational method/procedure is described which can be used to simulate individual- and mixed-mode interlaminar fracture progression in fiber composite laminates. Different combinations of Modes I, II, and III fracture are simulated by varying the crack location through the specimen...
eBook Chapter
Book: Toughened Composites
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1987
ISBN-10: 0-8031-0934-2
ISBN: 978-0-8031-0934-6
... for delamination seems to be independent of ply orientation if proper accounting of the near and far field energy dissipation is made. composite materials delamination Mode I Mode II mixed mode toughened epoxy William M. Jordan' and Walter L. Bradley ' Micromechanisms of Fracture in Toughened...
eBook Chapter
Book: Toughened Composites
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1987
ISBN-10: 0-8031-0934-2
ISBN: 978-0-8031-0934-6
... Five graphite/epoxy composites containing toughened epoxies prepared at Dow Chemical and AS-4 graphite fibers from Hercules have been studied in Mode I, mixed mode, and Mode II to determine their delamination fracture toughnesses G c and the controlling micromechanism of fracture. The G c...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1985
ISBN-10: 0-8031-0414-6
ISBN: 978-0-8031-0414-3
... The resin-dominated fracture behavior of several graphite/epoxy composites has been studied using delamination of split laminates and transverse cracking of compact tension specimens. Pure Mode I and mixed Mode I/Mode II fracture behavior has been studied using specimens cut from unidirectional...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1983
ISBN-10: 0-8031-0727-7
ISBN: 978-0-8031-0727-4
... techniques are now being widely pursued [ 1 ]. 2 The research reported in this paper builds on these developments to provide the basis for fracture mechanics treatments under the more general conditions involved in dynamic mixed-mode loading. Current work in elastic-plastic fracture mechanics is largely...
eBook Chapter
Book: Cracks and Fracture
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1976
ISBN-10: 0-8031-0318-2
ISBN: 978-0-8031-0318-4
... Mixed mode fracture in two dimensions has been of recent interest via study of a crack at an arbitrary angle to the axis of applied load. Three criteria for growth under tensile loads are reviewed and, although they proceed on distinct bases, give similar results. A corollary to a minimum energy...
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