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Mixed-mode fracture

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Published: 30 November 2013
Fig. 10 A scanning electron micrograph of a mixed fracture mode from a metal injection molded (MIM) steel. The dimples indicate ductile rupture. The flat features indicate separation of nonfused particles. The circular features on the flat fractures are porosity. More
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Published: 01 October 2012
(constant stress-rate loading) data. Strength degradation in water is predicted for a dynamic load of 1 MPa/s. A mixed-mode fracture criterion was chosen to account for the change in surface flaw reliability for multiaxial stress states. Source: Ref 10.10 More
Image
Published: 01 August 2005
to the direction of each propagation. (d) Dimple elongation from out-of-plane shear. (e) Dimple elongation from mixed mode of screw sliding with ductile tear (c + d). See Ref 2.13 for other mixed modes. More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270138
EISBN: 978-1-62708-301-0
... The SEM fractographs of the three zones are shown in Fig. CH31.2 to CH31.4 . Zone 1 shows a mixed mode of fracture, consisting of cleavage and intergranular fracture ( Fig. CH31.2 ). Zone 2 is characterized by striations and secondary fissures ( Fig. CH31.3 ). The direction of crack growth is from...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780417
EISBN: 978-1-62708-281-5
... fractured region. The delamination due to impact will also exhibit more evidence of shear (i.e., hackle formation in the damaged region) as compared to the surrounding area, which will generally have more river patterns indicative of the manually applied, mixed-mode, or mode I tensile loading. The impact...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630101
EISBN: 978-1-62708-270-9
... of metals with extensive gas porosity, it may be quite difficult to determine which cavities are true dimples and which are evidence of gas porosity. Mixed fracture modes: During study of a fracture surface, one should not be surprised to find different fracture modes. An example of a fracture through...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780109
EISBN: 978-1-62708-268-6
... fracture, and some additional work may be expended in work-hardening deformation under load. A fracture surface displaying both types of planes can be described as a mixed-mode fracture or, alternatively, by indicating the presence of shear lips on the fracture surface. Fig. 12.2 Schematic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270102
EISBN: 978-1-62708-301-0
... out on the barrel surface of a few failed bolts. A number of cracks were observed close to the fracture surface, propagating in inter and transgranular mode ( Fig. CH17.14 ). The bolt heads, shanks, and longitudinal sections near the threaded region were also examined. Deep intergranular oxidation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610055
EISBN: 978-1-62708-303-4
... before they can escape. In ductile fractures of metals with extensive gas porosity, it may be quite difficult to determine which cavities are true dimples and which are evidence of gas porosity. Mixed Fracture Modes. During study of a fracture surface, one should not be surprised to find different...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540169
EISBN: 978-1-62708-309-6
... by the percentage of shear lips visible on the rapid-growth portion of the fracture surfaces. A plane-strain state causes a flat fracture appearance. The fracture plane is perpendicular to the loading direction and is called the tensile mode failure. The plane-stress state causes a slant fracture appearance (having...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250257
EISBN: 978-1-62708-345-4
... Rim and web cracks Case/core separation Fatigue cracks Fracture Brittle fracture Ductile fracture Mixed mode fracture Tooth shear Fracture after plastic deformation Bending fatigue Low-cycle fatigue High-cycle fatigue   Root fillet cracks   Profile cracks...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630081
EISBN: 978-1-62708-270-9
... left corner. When viewed under the electron microscope, this type of fracture is likely to reveal a cleavage or quasi-cleavage fracture mode. (b) Fracture surface of a large (~5-¾ × 6 in.) equalizer bar made from D6B steel heat treated to a hardness of 45–47 HRC. This bar, which supports the front end...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030177
EISBN: 978-1-62708-349-2
.... Mater. , Vol 41 ( No. 1 ), 2007 , p 111 – 123 10.1177/0021998306063356 19. Singh S. and Partridge I.K. , Mixed-Mode Fracture in an Interleaved Carbon-Fibre/Epoxy Composite , Compos. Sci. Technol. , Vol 55 , 1995 , p 319 10.1016/0266-3538(95)00062-3 20. Hillermeier...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130111
EISBN: 978-1-62708-284-6
... presents cleavage regions in a microalloyed low-carbon steel, which can be identified by flat regions on the fracture surface. Additionally, it is worth mentioning that most parts of steels will present alternate regions consisting of cleavage areas and microvoids, evidencing a mixed mode of crack...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290261
EISBN: 978-1-62708-319-5
... system. BET surface area. The speci c surface area as measured by gas adsorption according to the Brunauer-Emmett-Teller theory. Widely used in characterization of ceramic powders and expressed as square meters per gram (m2/g). bimodal. A particle size distribution exhibiting two mode (mode is the most...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.9781627083195
EISBN: 978-1-62708-319-5
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540047
EISBN: 978-1-62708-309-6
.... This is not the same kind of brittle fracture (i.e., by separation) as generally expected. Slippage can occur if we superimpose some compression load (in one direction) to the hydrostatic pressure. Torsional failure can occur in one of two modes—shear or tension—because the magnitudes of τ max and σ max...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610101
EISBN: 978-1-62708-303-4
... or forward shear; caused by in-plane shear stress; crack initiation during fatigue often results from shear; in mixed K I - K II mode, K II causes crack to deflect until it reaches a mode I condition; mode II (and III) can produce friction as surfaces rub. (c) Tearing, or transverse shear; in mixed K...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030126
EISBN: 978-1-62708-282-2
... be appreciable because corrosion-resistant alloys are frequently quite ductile. The features of stress-corrosion fracture surfaces are covered in greater detail in the article “ Modes of Fracture ” and the “ Atlas of Fractographs ” in Fractography , Volume 12 of ASM Handbook , formerly 9th Edition Metals...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540319
EISBN: 978-1-62708-309-6
... loading can lead to delamination, the primary failure mode of most composites, and describes some of the methods that have been developed to improve delamination resistance, assess damage tolerance, determine residual strength, and predict failure modes. composite laminate damage tolerance...