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Numerical prediction of failure in high temperature formblowing and hardening
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials.
2011 (English)In: Hot sheet metal forming of high-performance steel, CHS2: 3rd international conference, Proceedings. Kassel, Germany, June 13-17, 2011 / [ed] Mats Oldenburg; Kurt Steinhoff; Braham Prakash, Auerbach: Verlag Wissenschaftliche Scripten , 2011, 57-64 p.Conference paper (Refereed)
Abstract [en]

The process studied in this work is high temperature formblowing and hardening (HTFH). Bursting failure is an irrecoverable failure mode present in the HTFH process. The main objective was to determine if a ductile fracture criterion would be possible to use as pre-bursting failure indicator in finite element (FE) simulations of the forming process. The failure criterion was implemented in the utilised FE code. Calibration was performed by the use of analytical forming limit curves (FLC:s). The FLC:s were derived from experimentally obtained stress-strain curves for different temperatures using theory for localised necking. Experiments with the HTFH process in the form of burst tests were performed. Experimental data and output from thermomechanical FE simula-tions of the process were compared. Results indicated that the implemented numerical criterion predicted failure prior to irrecoverable experimental failure. It is concluded that the implemented fracture criterion can be used as a failure indicator in FE simulations of the HTFH process.

Place, publisher, year, edition, pages
Auerbach: Verlag Wissenschaftliche Scripten , 2011. 57-64 p.
Research subject
Solid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-37932Local ID: c206228b-0782-492d-bbde-af3086105bbbISBN: 978-3-942267-17-5OAI: oai:DiVA.org:ltu-37932DiVA: diva2:1011431
Conference
International Conference on Hot Sheet Metal Forming of High-Perfomance Steel : 13/06/2011 - 17/06/2011
Note
Godkänd; 2011; 20111230 (gorlind)Available from: 2016-10-03 Created: 2016-10-03Bibliographically approved

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Lindkvist, GöranHäggblad, Hans-ÅkeOldenburg, Mats
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