A model for process-based crash simulation

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Odd-Geir, LademoSINTEF (författare)

A model for process-based crash simulation

Artikel/kapitelEngelska2008

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Elsevier BV,2008
printrdacarrier

Nummerbeteckningar

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

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Språk:engelska
Sammanfattning på:engelska

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Ämneskategori:ref swepub-contenttype
Ämneskategori:art swepub-publicationtype

Anmärkningar

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.

Ämnesord och genrebeteckningar

TEKNIK OCH TEKNOLOGIER Maskinteknik Teknisk mekanik hsv//swe
ENGINEERING AND TECHNOLOGY Mechanical Engineering Applied Mechanics hsv//eng
Hållfasthetslära
Solid Mechanics

Biuppslag (personer, institutioner, konferenser, titlar ...)

Berstad, ToroddSINTEF (författare)
Eriksson, MagnusSINTEF Materials and Chemistry; Structural Impact Laboratory (SIMLab), Department of Structural Engineering, Norwegian University of Science and Technology(Swepub:ltu)magnus (författare)
Tryland, ToreHydro Aluminium Structures (författare)
Furu, TrondHydro Aluminium R&D (författare)
Langseth, MagnusNorwegian University of Science and Technology (NTNU), Trondheim (författare)
Hopperstad, Odd StureNorwegian University of Science and Technology (NTNU), Trondheim (författare)
SINTEFSINTEF Materials and Chemistry; Structural Impact Laboratory (SIMLab), Department of Structural Engineering, Norwegian University of Science and Technology (creator_code:org_t)

Sammanhörande titlar

Ingår i:International Journal of Impact Engineering: Elsevier BV35:5, s. 376-3880734-743X1879-3509

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Av författaren/redakt...: Odd-Geir, Lademo; Berstad, Torodd; Eriksson, Magnus; Tryland, Tore; Furu, Trond; Langseth, Magnus; visa fler...; Hopperstad, Odd ...; visa färre...

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