000004700 001__ 4700
000004700 005__ 20141119144546.0
000004700 04107 $$aeng
000004700 046__ $$k2002-06-02
000004700 100__ $$aYonten, Karma
000004700 24500 $$aAN EVALUATION OF CONSTITUTIVE MODELS OF CONCRETE IN LS-DYNA FINITE ELEMENT CODE

000004700 24630 $$n15.$$pProceedings of the 15th ASCE Engineering Mechanics Division Conference
000004700 260__ $$bColumbia University in the City of New York
000004700 506__ $$arestricted
000004700 520__ $$2eng$$aDynamic non-linear finite element methods are extensively used to analyze vehicle-to-barrier crashes. The underlying challenge in this analysis is the capability of the constitutive models of concrete to represent a realistic response of the barrier under impact loading. LS-DYNA, a commercial FE code for crashworthiness analysis offers four major constitutive models for concrete. The performance of each of these models is assessed by making a comparison between numerical simulations and some benchmark stress-strain data, obtained from triaxial experiments conducted on plain concrete. Two of the constitutive models failed to produce realistic simulations beyond the elastic range. The smooth transition to non-linear regime and the observed post-peak response of concrete were well captured by Material Model 16 and 72, which relies heavily on a set of empirically obtained curves. Using the calibrated material models, a vehicular impact/crash scenario is then simulated to investigate the prediction of these constitutive models for the concrete barriers subjected to vehicular impact. The findings of the triaxial compression and vehicle-to-barrier crash test simulations are discussed along with the shortcomings of the constitutive models for concrete in LS-DYNA code.

000004700 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000004700 653__ $$aConstitutive Modeling, Concrete, Crashworthiness, Finite Element, LS-DYNA

000004700 7112_ $$a15th ASCE Engineering Mechanics Division Conference$$cNew York (US)$$d2002-06-02 / 2002-06-05$$gEM2002
000004700 720__ $$aYonten, Karma$$iManzari, Majid T.$$iEskandarian, Azim$$iMarzougui, Dhafer
000004700 8560_ $$ffischerc@itam.cas.cz
000004700 8564_ $$s219137$$uhttp://invenio.itam.cas.cz/record/4700/files/196.pdf$$yOriginal version of the author's contribution as presented on CD, .
000004700 962__ $$r4594
000004700 980__ $$aPAPER