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impact fracture

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270141
EISBN: 978-1-62708-301-0
...-defined chevron marks along the fracture surface that end in a shear lip on the convex side. Further examination using a SEM shows that the failure was due to overload. Based on these observations and the results of tensile testing and microstructural analysis, investigators concluded that a sudden impact...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780216
EISBN: 978-1-62708-281-5
... their associated results. A brief discussion on the linear elastic fracture mechanics method is presented, along with an example of its effectiveness as a predictive tool for impact performance. Various issues with a bearing on impact performance, such as processing, chemical attack, and aging, are also...
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
... microstructural variables on fracture toughness of steels, aluminum alloys, and titanium alloys. fracture ductile fracture brittle fracture Griffith theory plane-strain fracture toughness temperature steels aluminum alloys titanium alloys notched bar impact testing microstructure FRACTURE is...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610327
EISBN: 978-1-62708-303-4
..., it covers general characteristics, viscoelastic properties, and static strength. It also discusses fatigue life, impact strength, fracture toughness, and stress-rupture behaviors as well as environmental effects such as plasticization, solvation, swelling, stress cracking, degradation, and surface...
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
... methods and specimen configurations that have been developed to measure the toughness of various materials. In this chapter, five of the more common methods are covered: impact ductile-to-brittle transition temperature testing, drop-weight testing, plane-strain fracture toughness, J -integral, and crack...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610377
EISBN: 978-1-62708-303-4
... provides great energy-absorbing capability, as is indicated by the area under a stress-strain curve. As a result, when impacted, a metal structure will typically deform but not actually fracture. In contrast, composites are relatively brittle. A comparison of typical tensile stress-strain curves for the...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540169
EISBN: 978-1-62708-309-6
... all three fracture parameters—static K IC , K Id , and V-notch impact energy—are connected in some way so that correlation among any two parameters is feasible. Fig. 4.23 Influence of loading rate and temperature on fracture toughness of A 302 B steel. Source: Ref 4.32 The...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780204
EISBN: 978-1-62708-281-5
... fracture stress-to-craze value strain-to-craze value fracture toughness plastics HIGH-IMPACT PLASTICS, because of their light weight and toughness, are commonly used in structural components. Unfortunately, changes occurring in these materials during their service life can either severely limit...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410213
EISBN: 978-1-62708-265-5
...-strain-rate impact testing, the other representing testing at a slow strain rate produced by bending ( Ref 11.11 ). Fracture at high test temperatures produces a plateau in energy absorbed, often referred to as the upper shelf, and is produced by ductile fracture. The energy absorbed in fracture...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780404
EISBN: 978-1-62708-281-5
...), polyethylene (PE), polypropylene (PP), high-impact polystyrene (HIPS), polyamide (PA), polybutylene, polycarbonate (PC), polyethylene terephthalate (PET), and polyvinyl chloride (PVC). The most obvious example of a ductile fracture can be seen in the standard tensile specimen of a ductile polymer tested...
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
... temperature; high strain rate or impact; improper heat treatment; and/or environmental embrittlement. Brittle fractures, rather than ductile fractures, are more often the subject of a failure investigation, because they are often sudden, unexpected, and sometimes catastrophic. Similar to metals, many...
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
... fracture, depending on the magnitude of the stress applied. The property of ductility is somewhat related to the property of toughness, although the latter is usually measured in the presence of a notch or other stress concentration. The Charpy V-notch impact test is commonly used as a measure of...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610055
EISBN: 978-1-62708-303-4
... 2%. Ductile behavior is also associated with high energy absorption at fracture, and adequate toughness or ductility is often defined by impact data, where criteria to determine whether the fracture is ductile or brittle involve some minimum level of absorbed energy at the service temperature of...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.9781627083096
EISBN: 978-1-62708-309-6
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610001
EISBN: 978-1-62708-303-4
... place in all classes of materials. It is a major goal of structural engineering to develop methodologies to avoid such fractures, because they are associated with massive economic impacts and frequently involve loss of life. Fig. 2 Appearance of (a) ductile and (b) brittle tensile fractures in...
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
... specimen used to determine notch toughness in accordance with ASTM E 23 (dimensions in millimeters). The test coupon is chilled to the desired temperature and then quickly placed into the anvil to be broken. The inadequacy of tests such as the Charpy impact test to characterize fracture properties...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540047
EISBN: 978-1-62708-309-6
... Abstract This chapter examines the phenomena of deformation and fracture in metals, providing readers with an understanding of why it occurs and how it can be prevented. It begins with a detailed review of tension and compression stress-strain curves, explaining how they are produced and what...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780211
EISBN: 978-1-62708-281-5
.../m 2 ). The method in ASTM E 813 usually gives more conservative values than that in ASTM E 1737. Researchers ( Ref 29 , 31 , 35 , 36 ) have analyzed J data of high-impact polystyrene (HIPS), ABS, a polycarbonate (PC)/ABS blend, and a polycarbonate/polybutylene terephthalate (PBT) blend by three...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130241
EISBN: 978-1-62708-284-6
... whole machines are made. Among the most important of these are failures due to the action of static loading. There is, however, an entire spectrum of different types of dynamic loading, as well as volume fatigue, impact loading, contact stresses, destruction by wear of mating surfaces in friction, and...
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
... smearing damage. Quite often, areas exhibiting striations will be adjacent to areas that do not exhibit readily observable striations, sometimes due to differences in local material orientation. Impact damage after the fracture occurs can produce parallel smear lines that may resemble striations...