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global optimization

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Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002446
EISBN: 978-1-62708-194-8
... and provides some background on how these algorithms make decisions when searching for the optimal design. It also provides information on structural optimization, topology optimization, materials processing optimization, multidisciplinary optimization, and global optimization. design optimization...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005892
EISBN: 978-1-62708-167-2
... of logically different situations may occur, as shown in Table 1 . Finally, a multiobjective optimization problem is said to be multimodal if and only if more than one PF exists. In the single-objective case, a nonconvex function exhibits one or more local minima in addition to the global minimum...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005534
EISBN: 978-1-62708-197-9
.... , Space Exploration and Global Optimization for Computationally Intensive Design Problems: A Rough Set Based Approach , Struct. Multidiscip. Optim. , Vol 28 ( No. 6 ), 2004 , p 427 – 441 10.1007/s00158-004-0448-2 33. Wang G.G. and Simpson T.W. , Fuzzy Metamodeling for Space...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005636
EISBN: 978-1-62708-174-0
... such as Levenberg-Marquardt (LM) and conjugate gradient (CG), and global optimization algorithms such as genetic algorithms and simulated annealing ( Ref 117 , 123 , 124 , 131 ). Global optimization techniques are stochastic in nature and therefore typically have slower rates of convergence. Furthermore...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005505
EISBN: 978-1-62708-197-9
... a wide range of problems well. Again, there is no free lunch. Many optimization strategies have been developed to address different types of problems. These optimization strategies can be combined and applied to create new strategies, allowing both global and local search, continuous and discontinuous...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006413
EISBN: 978-1-62708-192-4
... is addressed. Responding to global green-energy sustainability and environmental opportunities, original equipment manufacturers (OEMs) and lubricant formulation manufacturers must work together more closely to design powertrain components and energy-efficient lubricants that achieve optimal fuel economy while...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005789
EISBN: 978-1-62708-165-8
... in time. Accordingly, a global numerical procedure for finding f is to compute an LSQ approximation of the measured data, except that f is restricted to be monotone. For example, monotone smoothing can be done by using cubic splines ( Ref 17 ). This leads to a constrained optimization problem, which...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003389
EISBN: 978-1-62708-195-5
..., and impact loads. Accurate static load analysis and natural frequency extraction are often considered essential first steps in many design processes, before more complex analyses, such as transient, fatigue, dynamic durability, crash energy absorption, and shape and size optimization, are performed...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006560
EISBN: 978-1-62708-290-7
... and manufacturing constraints for AM simultaneously at the early design stage. This is because functional optimization and manufacturing processes such as part orientation and manufacturing paths are the keys to determining the appropriate part design in the global DFAM method. Specifically, part orientation...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005402
EISBN: 978-1-62708-196-2
... was developed using a more general global optimization algorithm ( Ref 25 , 36 ). It is able to automatically calculate the stable phase diagram for a given thermodynamic description as well as calculate a variety of metastable phase diagrams at the demand of the user by deselecting the stable phases. Chang et...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003223
EISBN: 978-1-62708-199-3
... during the design process. References 1. Beitz W. , Design for Ease of Recycling , J. Eng. Des. , Vol 4 ( No. 1 ), 1993 10.1080/09544829308914769 2. Froehlich D. , Renault Recycling Project: Global Initiatives from New Car Design to the End of the Life Cycle...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003223
EISBN: 978-1-62708-199-3
... when selecting a manufacturing process. For example, the scrap value of turnings is low; that of punchings is high. The resale value of alternative metals/alloys for any particular process should also be considered. Once these values have been optimized, the value of the recycled scrap should...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005151
EISBN: 978-1-62708-186-3
... the tool. For example, simulation allows CAE analysts to adjust boundary conditions (e.g., binder tonnage) to quickly identify the optimal value. It is much faster and more reliable than trial-and-error, especially for complex parts. The CAE technology also allows the investigation of several alternative...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005427
EISBN: 978-1-62708-196-2
... cylinder block to optimize the heat treatment process. (a) Initial heat treatment process: 5 h age at 240 °C. (b) Optimized heat treatment process: 3 h age at 250 °C. Note: Property target in bolt boss area indicated by arrow is 220 MPa. Fig. 1 Virtual aluminum castings methodology flowchart...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005535
EISBN: 978-1-62708-197-9
... all the surfaces to ensure that they have at least the minimum draft on them so they are easily ejected. There are ways to find out the optimal parting line of a model that is to be cast and ways of finding how a surface will reflect light when it is finally a real product. There are even ways...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002438
EISBN: 978-1-62708-194-8
... of a wide variety of products and processes. Ranging from concerns about chlorofluorocarbons (CFCs) and possible destruction of the ozone layer to concerns about shrinking landfill capacity to concerns about pollution of air, water, and land, protection of the earth's environment has become a global issue...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005544
EISBN: 978-1-62708-197-9
...Abstract Abstract This article demonstrates the depth and breadth of commercial and third-party software packages available to simulate metals processes. It provides a representation of the spectrum of applications from simulation of atomic-level effects to manufacturing optimization...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003387
EISBN: 978-1-62708-195-5
... Fig. 1 Local shear stress in a symmetric laminate subject to a uniform axial stress in the x -direction (σ x ). The global strain is shown, but there is no in-plane shear strain (γ xy ). Local shear stress (τ xy ) is developed in each ply. Fig. 2 Distribution of shear stresses...
Book Chapter

By S.C. Lim
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006396
EISBN: 978-1-62708-192-4
... a particular tribological interaction, such as sliding) would contain sufficient information that designers and engineers could use to select the optimal operating condition for a pair of components in that tribological interaction. For such a wear map to be useful and meaningful, the two axes used should...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006312
EISBN: 978-1-62708-179-5
... was granted on October 25, 1949 ( Ref 1 ), and the global production of ductile iron has since grown to more than 20 million tonnes per year. It is less well known that Millis, Gagnebin, and Pilling also filed, and received, a patent for compacted graphite iron (CGI) on the same two dates in 1948 and 1949...