liu.seSearch for publications in DiVA
Change search
ReferencesLink to record
Permanent link

Direct link
Optimizing sheet metal forming processes: using a design hierarchy and response surface methodology
Linköping University, Department of Mechanical Engineering, Solid Mechanics. Linköping University, The Institute of Technology.
Linköping University, Department of Management and Engineering, Solid Mechanics. Linköping University, The Institute of Technology.
2006 (English)In: Journal of Materials Processing Technology, ISSN 0924-0136, Vol. 178, no 1-3, 218-233 p.Article in journal (Refereed) Published
Abstract [en]

In the present paper optimization has been used to evaluate alternative sheet metal forming processes. Six process set-ups were first defined in a hierarchy of designs and optimization was then used to evaluate each forming process of these designs. The challenge in designing the forming process was to avoid failure in the material and at the same time reach an acceptable through thickness strain. The conclusions of this study is that there may exist a different process that can give an improved product for the desired geometry. This process might be impossible for the optimization algorithm to reach due to either a poor starting point or a not so wise process set-up.

Place, publisher, year, edition, pages
2006. Vol. 178, no 1-3, 218-233 p.
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-41602DOI: 10.1016/j.jmatprotec.2005.03.040Local ID: 58201OAI: diva2:262456
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2012-12-03
In thesis
1. Optimization of sheet metal forming processes
Open this publication in new window or tab >>Optimization of sheet metal forming processes
2005 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The potential of using simulation and optimization techniques in the design of sheet metal forming processes has been investigated. Optimization has been used in a variety of sheet metal forming applications. This usage has given ideas and guidelines on how to formulate an optimization problems, how to ensure its rapid convergence and how to reach a feasible process design. Furthermore one method to include the uncertainty and variation in the governing parameters has been evaluated.

For each forming process many formability problems exist which usually are associated with fracture, wrinkling and springback. The aim of a good process design is to avoid these problems. By the use of simulation based design the physical trial- and error iterations can to a large extent be replaced by virtual iterations. When optimization techniques are used in the design process the number of iterations can be very large. In this work effort has been made to develop an optimization method, Space Mapping (SM), which is less computing intensive. It has been shown that SM can drastically reduce the required computing time and that its optimal solution is close to the optimal solution obtained by the more computing intensive Response Surface Methodology (RSM). The drawback of SM is that the method is less robust compared to RSM, and that it requires a better initial design for convergence.

Each industrial sheet metal forming process exhibits a certain degree of stochastic behavior due to uncertainties and variations in material properties, geometry and other process parameters. The forming process must be designed such that it is insensitive to these uncertainties and variations, i.e. the process must be robust. One possibility to consider uncer tainties and variations in a simulation and optimization based design process is to use the Monte Carlo method, in particular in combination with response surfaces as metamodels. It has been shown in this work that a linear response surface can successfully be used to identify the important design variables and to give an estimate of the probabilistic response. It has also been found that quadratic surfaces are required for a more accurate evaluation of the response.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2005. 34 p.
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 936
National Category
Engineering and Technology
urn:nbn:se:liu:diva-31401 (URN)17172 (Local ID)91-85297-74-7 (ISBN)17172 (Archive number)17172 (OAI)
Public defence
2005-05-13, C3, Hus C, Campus Valla, Linköpings Universitet, Linköping, 10:00 (Swedish)
Available from: 2009-10-09 Created: 2009-10-09 Last updated: 2012-12-03Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Jansson, TomasNilsson, Larsgunnar
By organisation
Solid MechanicsThe Institute of TechnologySolid Mechanics
In the same journal
Journal of Materials Processing Technology
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 118 hits
ReferencesLink to record
Permanent link

Direct link