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higher-fidelity models

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Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006546
EISBN: 978-1-62708-290-7
... Abstract This article focuses on four industrial additive manufacturing approaches that are used to create polymer parts. The first section focuses on material extrusion, providing information on lumped-parameter material flow models and higher-fidelity models developed to estimate temperature...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005435
EISBN: 978-1-62708-196-2
... materials design and process optimization. Improved model fidelity will enhance these capabilities and support higher levels of optimization in integrated materials and product design. The models presented here provide the framework for the prediction of behaviors under stress, including nonthermoelastic...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005531
EISBN: 978-1-62708-197-9
.... Fig. 25 Finite-element model used to simulate the compaction of the part shown in Fig. 22 To eliminate the cracks that appeared in part 30, part 34 was pressed with higher fill in the rim section and reduced fill in the hub section. The tool motions applied were modified to accommodate the...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005438
EISBN: 978-1-62708-196-2
... submodels to ensure that desirable accuracy is available for these key input parameters. Error and uncertainty from submodel inputs have a strong effect on the overall accuracy of higher-order complex models. If the submodel accuracy is insufficient and independent data are unavailable to further improve it...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005405
EISBN: 978-1-62708-196-2
..., and 1 as N t → infinity. The precise dependence of this ratio on N i depends on material, with higher-strength materials resulting in a shift of the curve to the left in accordance with a reduced transition fatigue life. Lower-strength materials are considered to have greater fatigue ductility...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005537
EISBN: 978-1-62708-197-9
...-dependent boundary conditions. Mesh the component geometry. All the general rules and guidelines used for standard finite-element analysis apply to the process model; for example, quad elements are better than triangular elements, a higher-density mesh yields more accurate results, and so on. One point...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005561
EISBN: 978-1-62708-174-0
... note that the change in weld pool shape shown in Fig. 6 also changes the spatial variation of cooling rates. As a result, the predictions of cooling rates are expected to be more accurate with the use of heat and fluid flow models. The fidelity of such calculations on the sensitivity of steel weld...
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
... technology to assist in a higher-fidelity approach to accident scene documentation and to create a model that assists in determining the cause of the accident. An sUAS may perform aerial photography and videography surveys, increasing the area of accident site documentation beyond the final resting position...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005426
EISBN: 978-1-62708-196-2
... by high Reynolds number. Turbulence is modeled using a two-equation model (standard K -ε or variants, Ref 27 ) in most cases. Applications to transient flows with additional physical complexity and/or more sophisticated models (e.g., compressibility, multiphase, reacting, higher-order turbulence...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005524
EISBN: 978-1-62708-197-9
... Abstract This article provides an overview of integrated weld modeling and presents strategic goals for the welding industry. It discusses the fundamentals of the underlying physics and the methodologies to solve the same. The article presents the pioneering work done to predict the heat...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005553
EISBN: 978-1-62708-174-0
... control one or two system parameters, such as penetration, bead width, heat-affected zone, or cooling rate. However, to develop significantly higher degrees of autonomy, a weld controller must be able to regulate a number of functions of the welding process over an extended period of time and under...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006465
EISBN: 978-1-62708-190-0
... ). Noncontact methods are more amenable to use with higher degrees of surface roughness but suffer from inherently lower probability of detection (POD) and sensitivity. Design for inspectability of additive components is a critical topic that needs engagement of designers and quality groups, and it is needed...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003435
EISBN: 978-1-62708-195-5
...) has its cladding replaced in sensing locations with a high-refractive-index material, higher in index than the resin it is to be embedded within. This provides a large change across the entire cure but as the cure approaches completion, its index changes very little. For aerospace parts, this approach...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005513
EISBN: 978-1-62708-197-9
... progressively. This is undesirable because it changes the solidification conditions significantly in the deposit from one location to another and can increase variability in the microstructure and mechanical properties. A larger melt pool also causes deeper remelting in the preceding layer and higher...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005504
EISBN: 978-1-62708-197-9
... polishers ( Ref 15 ) or micromilling machines ( Ref 16 ), have also been developed to reduce the time required for sectioning. Material can also be removed automatically using focused ion beam techniques ( Ref 17 , Ref 18 , Ref 19 , Ref 20 , Ref 21 , Ref 22 ). At much higher resolutions, the 3-D atom...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005431
EISBN: 978-1-62708-196-2
... nodes are sometimes called lower-order elements, and the ones with interior nodes are sometimes called higher-order elements. Most commercial codes permit the selective omission of the interior nodes. This permits joining of lower-order elements to higher-order elements. If interior nodes are used...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005456
EISBN: 978-1-62708-196-2
... process optimization For preform design using inverse techniques As a benchmark for validating predictions of higher-fidelity numerical models Both these methods have been extended to more complex deformation fields by discretizing the deforming body into finite-volume elements; examples of...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005538
EISBN: 978-1-62708-197-9
... computer-based simulation. The amount of computer memory for computational processing has actually increased at a higher rate than processing speed, as shown in Fig. 1 . Both of these factors have supported the further development and application of material and process simulation tools. Fig. 1...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003298
EISBN: 978-1-62708-176-4
... the uniaxial stress-strain compressive response of low mechanical impedance soft materials in the SHPB has been the subject of significant innovation since 1992. Higher-resolution measurement of the stress-strain responses of increasingly lower-flow-strength materials has led to the adoption of lower...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.9781627082907
EISBN: 978-1-62708-290-7