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finite-element methods

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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
... indicated 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...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001851
EISBN: 978-1-62708-241-9
..., and bearings. Equations of motion accounting for misalignment and unbalance were then derived using finite elements. A spectral method for resolving these equations was also developed, making it possible to obtain and analyze dynamic system response and identify misalignment and unbalance conditions...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001308
EISBN: 978-1-62708-215-0
... the cracking problem by introducing additional residual stresses into the rail. Existing through-flange cracks were analyzed by a finite-element method to show that the cracks did not compromise the integrity of the rail. However, because additional cracks could be propagated through the flange during further...
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
.... et al , Mechanics of Materials , 3rd ed. , McGraw-Hill Publishing Co. , 2001 7. Zienkewicz O.C. , The Finite Element Method in Engineering Science , McGraw-Hill Publishing Co. , 1971 8. Gallagher R.H. , Finite Element Analysis: Fundamentals , Prentice-Hall...
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
.... , 2001 5. Gere J.M. and Timoshenko S.P. , Mechanics of Materials , 4th ed. , PWS Publishers , Boston , 1997 6. Beer F.P. et al. , Mechanics of Materials , 3rd ed. , McGraw-Hill Publishing Co. , 2001 7. Zienkewicz O.C. , The Finite Element Method...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001309
EISBN: 978-1-62708-215-0
.... Inspection intervals were devised to avoid future problems. Bending fatigue Crack propagation Finite element method Mechanical properties Stress concentration Tubing Weldments 1008 UNS G10080 Fatigue fracture Background Visual Examination of General Physical Features Testing Procedure...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001763
EISBN: 978-1-62708-241-9
... at the fractured regions by the finite element method. The fatigue failure analysis also provided a basis for some suggestions to raise the durability of the transmission system of the ATV. As shown in Fig. 1 , the shaft fractured at the location secured with a pinion gear, where a maximum bending moment...
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
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001136
EISBN: 978-1-62708-229-7
... stress was evaluated as the sum of the mean (steady state) stress predicted by finite element methods (of 110 to 120 MPa) plus half the cyclic stress amplitude derived from quantitative fractographic studies, to give values in excess of 160 to 170 MPa. The evidence of the previous section indicates...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001764
EISBN: 978-1-62708-241-9
... a load couple and multipoint constraints (MPCs). In the finite element method, MPCs are used to tie together all of the nodes on a component surface through a single node off the component surface, as indicated in the figure. In the present case, the MPCs model the point of load transfer to the component...
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
..., initiating fatigue crack on the wire surface. Raoof and Kraincanic [ 7 ] used a model to analyze the large-diameter steel ropes with independent wire rope core (IWRC). They considered the effect of friction between the wires. Jiang et al. [ 8 ] used finite element method to analyze wire ropes...
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
... it is possible or practical. In cases where the accessibility around the location of interest is limited to one or two directions (either due to sample geometry, economic, or time constraints), the priority is given to stress measurements in the direction perpendicular to the crack line. Finite-Element Method...
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
... structures, the failure analyst must identify the components and locations most vulnerable to cracking. Empirical Observation Method for Measurement Location Selection Finite-Element Method for Measurement Location Selection Stress-Mapping Method for Measurement Location Selection Accessing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c9001606
EISBN: 978-1-62708-226-6
... and Properties of Engineering Materials , McGraw-Hill , New York, NY , 2002 , pp. 255 and 357 . 17. Anon .: ABAQUS User's Manual , Version 6.2, Hibbit, Karlsson, and Sorenson, Inc. , Providence, RI , 2001 , pp. 14.1.1 – 2 . 18. Hughes T.J.R. : The Finite Element Method , Prentice...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001788
EISBN: 978-1-62708-241-9
... is considered as an elastic body and the billet is made of aluminum and is modeled as a von Mises elastic-plastic material with isotropic hardening. Predicting stresses and strains during extrusion processes using finite element method require appropriate inputs and mechanical properties of billet and die...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001347
EISBN: 978-1-62708-215-0
... segment rings D and E Figure 14 illustrates a finite element computer simulation of the tank car shell segments and the nozzle pad. The finite element method permits a more detailed picture of the actual stresses with concentration and defect effects in the nozzle, welds, and shell as a result...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001602
EISBN: 978-1-62708-229-7
... of the buckets. These results indicated the possibility of sulfur contamination from either the fuel or the air. Stress Analysis Static and thermomechanical stress analysis was carried out on the buckets by means of the finite element method (FEM). The maximum stress at the central portion of the shroud...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001760
EISBN: 978-1-62708-241-9
.... Metallurgical examination of the crack origin revealed that casting pores played a role in initiating the crack. Stress components, identified by finite element analysis, also played a role, particularly the stresses imposed by the bolt assembly leading to plastic strain. It was concluded that the failure can...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001845
EISBN: 978-1-62708-241-9
... led an investigation that included fractographic and microstructural analysis, hardness testing, inductively coupled plasma spectroscopy, and finite-element analysis. The fracture was shown to be brittle in nature and covered with oxide flakes, but no other flaws relevant to the failure were observed...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001852
EISBN: 978-1-62708-241-9
.... With the help of finite element modeling, they analyzed the material as well as the design and in-service application of the mold. They discovered that overconstraining the mold, while it was in service, caused excessive thermal stresses which accelerated crack initiation and propagation. Investigators also...