1-20 of 389 Search Results for

time-dependent fracture mechanics

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006767
EISBN: 978-1-62708-295-2
... but allowing the pilot sufficient flying time to land. In any case, the goal of failure analysis is to understand a situation sufficiently well to determine if changes in design, manufacture, or other areas are needed. When confronted with a cracked, fractured, or deformed component, the failure...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006774
EISBN: 978-1-62708-295-2
... “ Intergranular Fracture ” in this Volume. Most importantly, one must understand that fracture surfaces are a snapshot in time, often influenced by events that occurred after the fracture process. Damage, corrosion, and handling artifacts must be understood prior to making determinations regarding the origins...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006775
EISBN: 978-1-62708-295-2
... twinning. The microscale brittle fracture mechanism is by cleavage. Thus, in metallic materials, slip and twinning deformation processes compete with the brittle fracture process of cleavage. All mechanisms may not operate in a given lattice (material), and the activation of a given mechanism depends on...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006776
EISBN: 978-1-62708-295-2
... frequency and time history of loading ( Ref 32 ). Heat resulting from mechanical hysteresis during cyclic loading of plastics can cause thermal failure. Additionally, depending on load level and time history, fatigue cracks in polymers may not propagate steadily (with an increment of growth for each...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0001831
EISBN: 978-1-62708-181-8
... mercury. The fracture is predominantly intergranular with some transgranular contribution. (C.E. Price, Oklahoma State University) Fig. 33 Stress-corrosion fracture that occured by decohesion along the parting plane of an aluminum alloy forging Creep rupture is a time-dependent failure...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006777
EISBN: 978-1-62708-295-2
... various time- or temperature-dependent mechanisms, such as fatigue, stress-corrosion cracking, liquid metal embrittlement, solid metal embrittlement, hydrogen embrittlement, and creep. In addition, transgranular cracks also can, at some point, follow a grain-boundary path for short distances under certain...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005461
EISBN: 978-1-62708-196-2
....” In other words, it was recognized early on that the plastic deformation and fracture behavior of materials were functions not only of the material but the processing conditions as well. At that time, ductility was primarily expressed through measurements of elongation and reduction of area...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0001833
EISBN: 978-1-62708-181-8
... used (as is customary), it should be moved during the exposure to obtain equal illumination. The motion is usually both circular and back and forth over distances of 150 to 300 mm (6 to 12 in.). The effect is reproducible because the long exposure time makes the motion noncritical. Background papers...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006676
EISBN: 978-1-62708-213-6
... Abstract Dynamic mechanical analysis (DMA) is a powerful tool for studying the viscoelastic properties and behavior of a range of materials as a function of time, temperature, and frequency. This article describes various systems and equipment used in DMA setup and discusses the processes...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003225
EISBN: 978-1-62708-199-3
... refer to “overload fracture” as a way to distinguish a failure from fatigue and stress-corrosion crack growth. However, a true overload failure is rare. An indication of overload fracture could just indicate an undetected crack or defect leading to fracture. (b) Failure after a period of time where...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003241
EISBN: 978-1-62708-199-3
... most often used for testing harder metals, such as steels and cast irons. The load is held for a specified time (10 to 15 s for iron or steel and about 30 s for softer metals), after which the diameter of the recovered indentation is measured in millimeters. This time period is required to ensure that...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006779
EISBN: 978-1-62708-295-2
... Abstract Fatigue failures may occur in components subjected to fluctuating (time-dependent) loading as a result of progressive localized permanent damage described by the stages of crack initiation, cyclic crack propagation, and subsequent final fracture after a given number of load...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006753
EISBN: 978-1-62708-295-2
... their most basic descriptions, TQM and CI represent full organizational commitment to a system focused on “doing the right thing right the first time” and not merely meeting but exceeding customer requirements ( Ref 8 , 9 ). They are focused on process improvements, generally in a production...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004017
EISBN: 978-1-62708-185-6
... deformation of a metallurgical structure that results in unsatisfactory mechanical properties, such as poor fracture toughness or fatigue resistance, can be considered to be a limit on workability. Generally, workability depends on the local conditions of stress, strain, strain rate, and temperature in...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005411
EISBN: 978-1-62708-196-2
... crack growth rate. The results of these studies are briefly described to illustrate how useful some of these experiments can be if performed now with access to far superior experimental and simulation capabilities as well as much better access to time-dependent fracture mechanics concepts. Figure 2...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.9781627081764
EISBN: 978-1-62708-176-4
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003025
EISBN: 978-1-62708-200-6
... 66–110 9.6–16 1–4 50 to >100 1 to >2 Source: Ref 2 The mechanical behavior of polymers is time dependent, or viscoelastic. Therefore, design data based on short-term tests have the possibility of misrepresenting that polymer in a design application that involves long-term...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0001834
EISBN: 978-1-62708-181-8
... should begin with visual inspection, perhaps aided by the use of a simple hand lens (up to 10 ×). In failure analyses, it may be necessary to examine the entire component or structure to find the broken sections, to determine the origin of the failure, and to separate the fractures according to the time...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003044
EISBN: 978-1-62708-200-6
... the orientation of the principal material axis, x 1 , within each ply. If a ply were repeated, a subscript would be used to denote the number of repeating plies. Thus, [0°/90° 3 /0°] indicates that the 90° ply is repeated three times. Any laminate in which the ply stacking sequence below the...
Book Chapter

Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006790
EISBN: 978-1-62708-295-2
... microscopic level. Determine the wear rate by calculating the material loss over some unit of time or distance. Determine the coefficient of friction (if possible). Identify the type of lubricant used and its effectiveness in slowing down material loss, for example, was the grease, oil, modified...