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single-load fracture

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Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630063
EISBN: 978-1-62708-270-9
...Abstract Abstract From a fundamental standpoint, there are only two modes, or ways, in which metals can fracture under single, or monotonic, loads: shear and cleavage. There are fracture modes other than shear and cleavage. These include intergranular and quasi-cleavage fracture modes...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630071
EISBN: 978-1-62708-270-9
...Abstract Abstract In order to understand how various types of single-load fractures are caused, one must understand the forces acting on the metals and also the characteristics of the metals themselves. All fractures are caused by stresses. Stress systems are best studied by examining free-body...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540121
EISBN: 978-1-62708-309-6
... features of fatigue fractures Final fracture occurs during the last stress cycle when the cross section cannot sustain the applied load. The final fracture—which is the result of a single overload—can be brittle, ductile, or a combination of the two. For some materials, such as relatively brittle...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630117
EISBN: 978-1-62708-270-9
... the origin of a low-cycle fatigue-loaded test article A tremendous amount of information can be learned about a fatigue fracture with only macroscopic examination. That is, study with the unaided eye and relatively low magnification—up to perhaps 25 to 50×—is usually the most important single way...
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 a fracture that may have originated with a fatigue or brittle fracture. As pointed out in Chapter 6, “Basic Single-Load Fracture Modes,” in this book, ductile fractures are those in which the shear stress exceeds the shear strength before any other mode of fracture can occur. Therefore...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630023
EISBN: 978-1-62708-270-9
...) in Chapter 7, “Stress Systems Related to Single-Load Fracture of Ductile and Brittle Metals,” in this book. In pure compression, the compressive stress is uniform across the section if no local stress concentrations or discontinuities are present, as shown in Fig. 3(a) . A transverse, or annular...
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
... in single loading. Brittle means little or no permanent deformation prior to fracture, usually accompanied by high hardness and strength but with little tolerance for discontinuities. A brittle fracture occurs at stresses below the material’s yield strength (i.e., in the elastic range of the stress-strain...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780211
EISBN: 978-1-62708-281-5
... and hysteresis methods, which are both single-specimen techniques. The normalization method does not require unloading cycles or on-line crack measurement and has been used successfully for metallic materials ( Ref 31 ). The method is based on the assumption that the load, P , on the specimen can be represented...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610263
EISBN: 978-1-62708-303-4
... Size of structure or specimen (constraint) Notch/crack acuity Loading rate Temperature Some of these are discussed subsequently in the context of welded regions. In conventional structural steels that have a ferritic microstructure, both Charpy and fracture mechanics toughness tests...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630257
EISBN: 978-1-62708-270-9
... . Fracture mechanics is based on the theoretical principle that the stress field ahead of a sharp crack can be characterized by a single parameter called the crack-tip stress intensity, K , which is related to energy release rate. For mode I loading, the crack-tip stress field differs from another only...
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
...Abstract Abstract Fracture mechanics is the science of predicting the load-carrying capabilities of cracked structures based on a mathematical description of the stress field surrounding the crack. The fundamental ideas stem from the work of Griffith, who demonstrated that the strain energy...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870351
EISBN: 978-1-62708-314-0
... ASTM D 6641 Single Lap Shear Test Double Lap Shear Test Thick Adherend Test Although it is never desired to intentionally load an adhesive bondline in peel, it is important to understand the peel strength of any adhesive used. The two most widely used peel tests are the roller bell peel...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540047
EISBN: 978-1-62708-309-6
... and what they reveal about the load-carrying characteristics of engineering materials. It then discusses the use of failure criteria and the determination of yielding and fracture limits. It goes on to describe the mechanisms and appearances of brittle and ductile fractures and stress rupture, providing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060385
EISBN: 978-1-62708-261-7
... in significant financial losses and potential loss of life. In general, tensile fractures can be identified as brittle if they as possess several of the following characteristics: The fracture surface is composed of relatively flat surface features and is perpendicular to the direction of loading...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240221
EISBN: 978-1-62708-251-8
.... During service, the flaw initially propagates in a stable manner under static or repeated loads, often aided by corrosion. When the flaw reaches a critical size, final fracture is sudden, proceeding at velocities approaching the speed of sound. Brittle fractures are generally flat, with little...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780185
EISBN: 978-1-62708-281-5
... Tear propagation resistance of plastic film and thin sheeting by a single tear method D 2990 899–1,2 Tensile, compressive, and flexural creep and creep-rupture of plastics D 3763 6603–2 High-speed puncture properties of plastics using load and displacement sensors D 4065 6721–1...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780249
EISBN: 978-1-62708-281-5
... in the active zone. Depending on the material and loading conditions, the active zone may or may not be detectable during a crack propagation experiment, but it exists nonetheless. The crack and the preceding and surrounding damage are considered a single thermodynamic entity. Because fracture is envisioned...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870325
EISBN: 978-1-62708-344-7
... the data for cyclic energy dissipation is shown in Fig. 12.44 . Included are cyclic tensile loading, compressive loading, and completely reversed loading. While there is some scatter, it is remarkable that all points fall along a single straight line of slope 0.60. That all types of loading fall...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540215
EISBN: 978-1-62708-309-6
... inspection intervals and to periodically update the fracture critical parts list. An actual application requires specifying the extent and type of damage and the load level to be achieved with the damage present. These basic criteria are assigned on the basis of engineering judgment. The goal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540281
EISBN: 978-1-62708-309-6
... for Metals , 1983 , p 149 – 177 6.20. Larsen J.M. and Nicholas T. , Load Sequence Crack Growth Transients in a Superalloy at Elevated Temperature, Fracture Mechanics, 14th Symposium , Vol II : Testing and Applications , STP 791, ASTM, 1983 , p II.536 – II.552 6.21. Liu A.F...