1-20 of 63 Search Results for

strength degradation model

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 Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003512
EISBN: 978-1-62708-180-1
... of the structure to be knowingly degraded below ultimate strength (1.5 × limit). The damage-tolerance evaluation is merely a means of providing an inspection program for a structure that is not expected to crack under normal circumstances, but may crack in service due to inadvertent circumstances. If cracks...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003571
EISBN: 978-1-62708-180-1
... interface temperature is high. An important application of thermosets in a tribological context is in brake pads where the base polymer is mixed with several additives for optimal friction, wear, and mechanical strength. Although friction models are available for interfacial sliding, theoretical wear...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003517
EISBN: 978-1-62708-180-1
... corrosion damage, and coating degradation. Strengthening Mechanisms Almost all of the alloys used in industrial gas turbine blades belong to the family of precipitation-hardened alloys. High creep, tensile, and fatigue strengths are achieved in superalloys by a variety of strengthening mechanisms...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001850
EISBN: 978-1-62708-241-9
..., the blow pipe was exposed to high temperatures when the liner cracked and subsequently bulged out due to creep. refractory-lined pipe creep deformation overheating carbon steel voids scale grain boundary oxidation grain coarsening microstructural examination strength P265GH (nonresulfurized...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001901
EISBN: 978-1-62708-218-1
... strength, impact-resistant, and low-moisture-absorbent polymer, thermal degradation processes can readily compromise any of its apparent advantages, as depolymerization dominates over oxidation. The additional presence of acid at or above the continuous service temperature further accelerates...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006787
EISBN: 978-1-62708-295-2
...), grouped by examples of sources of siliceous debris, compositions reported for actual deposits in engines, and model compositions used in laboratory investigations of the problem. Source: Ref 196 . Reference citations in Ref 196 listed along the bottom of the image. Reprinted with permission from...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003526
EISBN: 978-1-62708-180-1
... Fig. 1 Common types of finite elements used in modeling with examples. (a) Beam spar elements used to construct, for example, a beam element model. (b) Two-dimensional solid-model element with example. (c) Two-dimensional axisymmetric solid-model element with example. (d) Three-dimensional...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006773
EISBN: 978-1-62708-295-2
... analysis. This article provides a general view on the applicability of finite-element modeling in conducting analyses of failed components. It highlights the uses of finite-element modeling in the area of failure analysis and design, with emphasis on structural analysis. The discussion covers the general...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003514
EISBN: 978-1-62708-180-1
.... This is an example of a time-invariant problem. For the time-variant case, the parameters (e.g., mean and standard deviation) of S and R are modeled as functions of time. A common example is that of a structural element whose mean strength, μ R , decreases as a function of time as a result of a growing fatigue...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003546
EISBN: 978-1-62708-180-1
... to 20 kcal/mol. These curves form an envelope for virtually all conditions encountered in practice. For Eq 4 to apply, the main condition that must be satisfied is that the stress at the tip of the slip band must exceed the cohesive strength of the oxygen-degraded grain boundary. That condition...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.9781627082952
EISBN: 978-1-62708-295-2
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001803
EISBN: 978-1-62708-241-9
... sustain minimal damage from the body, and must provide the required strength, especially high fatigue strength and toughness, for joints and other applications. The essence of a biomaterial is an economic (cheap) implant with the mechanical, physical, and chemical properties that provide structural...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001777
EISBN: 978-1-62708-241-9
...-existing crack that promoted the degradation of the strength of the welded joint. The oxidized fracture surface, was probably formed during commissioning, when the first load tests of the equipment were carried out, remaining exposed to the environment, until the beginning of operation with iron ore, less...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003515
EISBN: 978-1-62708-180-1
... of a structure is that usage period in flight hours when there is a low probability that the strength will degrade below its design ultimate value due to fatigue cracking. The determination of the safe-life of an aircraft depends primarily on the results of a full-scale fatigue test of the structure. The number...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003500
EISBN: 978-1-62708-180-1
... and customer satisfaction defined by the new management systems. The cultural aspect is critical, as those who have identified problems must be encouraged to come forward. Furthermore, resources and commitment are required to formulate the solutions and implement necessary changes. Problem-Solving Models...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003528
EISBN: 978-1-62708-180-1
... −62.6 −62.9 Standard deviation 0.7 1.1 Fig. 30 Finite-element model showing maximum stress concentration in cloverleaf radius. The highest stress concentration is in the small black area surrounded by white. Fig. 31 Typical residual-stress profile as a function...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006768
EISBN: 978-1-62708-295-2
... (XRD) peak integral breadth Fig. 28 X-ray diffraction (XRD) residual stress versus heat treatment temperature for various iron alloys. Specimens were held at temperature for 1 h and furnace cooled. Fig. 30 Finite-element model showing maximum stress concentration in cloverleaf...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003555
EISBN: 978-1-62708-180-1
... Cristobalite, silica SiO 2 1723 3133 Carborundum, silicon carbide SiC 2700 (a) 4892 (a) Silicon nitride Si 3 N 4 1800 (b) 3270 (b) Boron nitride BN 3000 (a) 5430 (a) (a) Sublimes. (b) Dissociates Fig. 2 High-temperature degradation of a gas turbine transition...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001685
EISBN: 978-1-62708-235-8
...Abstract Abstract The U-0.8wt%Ti alloy is often used in weapon applications where high strength and fairly good ductility are necessary. Components are immersion quenched in water from the gamma phase to produce a martensitic structure that is amenable to aging. Undesirable conditions occur...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001839
EISBN: 978-1-62708-241-9
... the problem through appropriate process intervention to prevent its recurrence in low nickel stainless steel hot rolled coils. Experimental Procedure The chemical composition of the steel samples was analyzed using an optical emission spectrometer (OES), ARL Model 3460. The hydrogen content...