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- Odd-Geir, LademoSINTEF (author)
A model for process-based crash simulation
- Article/chapterEnglish2008
Publisher, publication year, extent ...
- Elsevier BV,2008
- printrdacarrier
Numbers
- LIBRIS-ID:oai:DiVA.org:ltu-10458
- https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-10458URI
- https://doi.org/10.1016/j.ijimpeng.2007.03.004DOI
Supplementary language notes
- Language:English
- Summary in:English
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- SwePubSwePub
Classification
Notes
- Validerad; 2008; 20080522 (magnus)
- Manufacturing of a bumper system from aluminium extrusions often involves series of forming operations performed in the soft W-temper condition, and then artificially age-hardening of the components to the material's peak hardness T6 condition. It is probable that proper finite element (FE) modelling of the crash performance of the resulting systems must rely upon a geometry obtained from an FE model following the process route, i.e., including simulation of all major forming operations. The forming operations also result in an inhomogeneous evolution of some internal variables (among others the effective plastic strain) within the shaped components. Results from tensile tests reveal that plastic straining in W-temper leads to a significant change of the T6 work-hardening curves. In addition, the tests show that the plastic pre-deformation causes a reduction of the elongation of the T6 specimens. In the present work, these process effects have been included in a user-defined elastoplastic constitutive model in LS-DYNA incorporating a state-of-the-art anisotropic yield criterion, the associated flow rule and a non-linear isotropic work hardening rule as well as some ductile fracture criteria. A first demonstration and assessment of the modelling methodology is shown by ‘through-process analysis' of two uniaxial tensile test series. The industrial use and relevance of the modelling technique is subsequently demonstrated by a case study on an industrial bumper beam system.
Subject headings and genre
- TEKNIK OCH TEKNOLOGIER Maskinteknik Teknisk mekanik hsv//swe
- ENGINEERING AND TECHNOLOGY Mechanical Engineering Applied Mechanics hsv//eng
- Hållfasthetslära
- Solid Mechanics
Added entries (persons, corporate bodies, meetings, titles ...)
- Berstad, ToroddSINTEF (author)
- Eriksson, MagnusSINTEF Materials and Chemistry; Structural Impact Laboratory (SIMLab), Department of Structural Engineering, Norwegian University of Science and Technology(Swepub:ltu)magnus (author)
- Tryland, ToreHydro Aluminium Structures (author)
- Furu, TrondHydro Aluminium R&D (author)
- Langseth, MagnusNorwegian University of Science and Technology (NTNU), Trondheim (author)
- Hopperstad, Odd StureNorwegian University of Science and Technology (NTNU), Trondheim (author)
- SINTEFSINTEF Materials and Chemistry; Structural Impact Laboratory (SIMLab), Department of Structural Engineering, Norwegian University of Science and Technology (creator_code:org_t)
Related titles
- In:International Journal of Impact Engineering: Elsevier BV35:5, s. 376-3880734-743X1879-3509
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