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Published: 01 December 2019
Fig. 2 Front ( a ) and rear ( b ) views of the BSR computational model developed for numerical structural analysis More
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006772
EISBN: 978-1-62708-295-2
... than a large-scale accident. The approach presented is that the analysis and reconstruction is based on the physical evidence. The article provides a brief review of some general concepts on the use and limitations of advanced data acquisition tools and computer modeling. Legal implications...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001082
EISBN: 978-1-62708-214-3
... that the fracture originated near the blade-to-hub attachment in the area of the weld buildup. Specimens from four failed castings and from an impeller that had developed cracks prior to design modification were subjected to a complete analysis. A number of finite-element-method computer models were also...
Image
Published: 15 January 2021
Fig. 58 Model of swivel bracket reconstructed from computed tomography scan data. Isometric views More
Image
Published: 15 January 2021
Fig. 59 Model of swivel bracket reconstructed from computed tomography scan data. (a) Front view. (b) Rear view More
Image
Published: 15 January 2021
Fig. 60 Model of swivel bracket reconstructed from computed tomography scan data. (a) Top view. (b) Bottom view More
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
... affected by the initiation of the collapse; (c) sampling of key parts for evaluation through mechanical tests (hardness, tensile, and Charpy tests), fractography, and microstructural characterization; (d) structural analysis using computational models; and (e) analysis of the operational conditions before...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003523
EISBN: 978-1-62708-180-1
... consists of simple mathematical modeling of a physical system or more complex computer modeling of a system or part, the modeling technique may directly or indirectly give insight to the cause of an accident. Accident Reconstruction The term “accident reconstruction” has traditionally been used...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001817
EISBN: 978-1-62708-241-9
... out to model the failure of the wire rope. For this, a finite element analysis was performed to compute the stress and deformation of the wires. Figure 9 shows the model of the wire rope. To model the sophisticated geometry of the wires, the parametric equations of the position of each wire...
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
... of finite-element modeling in conducting analyses of failed components. It is meant to highlight the uses of finite-element modeling in the area of failure analysis and design, with emphasis on structural analysis. However, the ongoing advances in computing power and speed have continued to reduce...
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
... and then connect them correctly to form the elements—a time-consuming task. These models then had to be solved, and the limiting size of models was the memory and computing speed of the computers available. Because computing power has been (and still is) the limiting factor in the generic use of FEA, models...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001797
EISBN: 978-1-62708-241-9
... prevalent errors affecting cam–follower systems. Rothbart [ 6 ] computed the dynamic response of the system in presence of surface roughness of the cam. Kim and Newcombe [ 7 ] presented a profile model error with random amplitudes and calculated the dynamic response of a flexible cam–follower system...
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
... always consists of three elements: Failure model definition—generically called a “limit state” in probabilistic analysis Random variable definitions—variables in the limit state that are considered random Probabilistic computations These elements are described in the next several...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001071
EISBN: 978-1-62708-214-3
... Analytical To obtain a picture of the stress and deformation state of the valve at various locations, particularly in the flange-to-juncture area, a number of finite-element computer models were constructed. The finite-element computer simulation method was chosen in lieu of experimental simulation...
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 Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006938
EISBN: 978-1-62708-395-9
... to be able to directly instrument the part in question during use of the assembly (which may enable collection of more direct functional data), it may be necessary to instrument other, more accessible, components of an assembly and to use physical models (such as computational tools) to map the measured data...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006803
EISBN: 978-1-62708-329-4
..., are the question to be answered, the computational effort is even greater. Efficient gradient-based numerical algorithms for estimating probabilities of failure ( Ref 9 – 11 ) were developed through the 1980s, but all suffer from the problem of being restricted to computationally efficient models, or using...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001807
EISBN: 978-1-62708-241-9
... computation especially of the rolling element bearing. Lundberg and Palmgren [ 3 , 4 ] proposed the first theoretical model for the computation of bearing’s life. They supposed that cracks may initiate at a depth below the surface where the maximum orthogonal shear stress and a weak point in the material...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006796
EISBN: 978-1-62708-295-2
... by numerical simulation, in which the three-dimensional flow field in a pipeline is solved using the Navier-Stokes equation together with a turbulence model. In this computation, the two-phase flow solver is preferable ( Ref 13 ), but the single-phase flow solver can provide a reasonable tool in consideration...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001588
EISBN: 978-1-62708-221-1
... and fines was slightly higher than typical nominal member stresses were well below the steel yield strength analogous members were stressed 15% higher in the west truss than in the east Local joint stresses were computed by 3-D, elastic-plastic, finite element modeling. The lower chords were...