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Determination of yield surfaces in advanced constitutive powder models using inverse modeling
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.), Solid Mechanics (Div.).
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.), Solid Mechanics (Div.).ORCID iD: 0000-0001-6232-8819
2011 (English)In: Proceedings of the Euro PM 2011 Congress and Exhibition, European Powder Metallurgy Association , 2011, Vol. 3, 247-252 p.Conference paper (Refereed)
Abstract [en]

In order to decrease the extensive experimental work in product development of WC/Co powder tooling equipment, an investigation of the applicability of inverse procedures to industrially relevant material models is performed. The powder die compaction process of WC/Co powder is modeled using the finite element method and an advanced plasticity-based constitutive model. An angled indenter is used to increase the sensitivity of constitutive parameters with respect to the measurable data from experiment, which is done using an instrumented die. Here, the inverse modeling (optimization) is performed (using iterative reduction of variable space and a combination of genetic (GA) and gradient search algorithms) in order to determine the yield surface of the investigated material. The results indicate that inverse modeling can be a useful tool in order to reduce the experimental efforts at material characterization of powder materials described by advanced material models.

Place, publisher, year, edition, pages
European Powder Metallurgy Association , 2011. Vol. 3, 247-252 p.
Keyword [en]
Inverse problems, Materials, Product development, Advanced materials, Constitutive parameters, Gradient search algorithms, Instrumented die, Inverse modeling, Material characterizations, Material models, Powder material
National Category
Applied Mechanics
URN: urn:nbn:se:kth:diva-80876ScopusID: 2-s2.0-84902137419ISBN: 978-189907220-0OAI: diva2:496870
European International Powder Metallurgy Congress and Exhibition, Euro PM 2011, Barcelona, Spain, 9 October 2011 through 12 October 2011

QC 20120412

Available from: 2012-02-10 Created: 2012-02-10 Last updated: 2015-04-21Bibliographically approved

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Andersson, DanielLarsson, Per-Lennart
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