000004121 001__ 4121
000004121 005__ 20141118153335.0
000004121 04107 $$acze
000004121 046__ $$k2004-05-10
000004121 100__ $$aPták, S.
000004121 24500 $$aAssessment of experiment reproducibility by finite element analysis

000004121 24630 $$n10.$$pEngineering Mechanics 2004
000004121 260__ $$bInstitute of Thermomechanics AS CR, v.v.i., Prague
000004121 506__ $$arestricted
000004121 520__ $$2eng$$a Cylindrical metallic shell subjected to localized impact loading evoking wave response was considered. Experiments were carried out employing the Double pulse holographic interferometry (DPHI) for evaluation of displacements, the Doppler interferometry (DI) for velocities and the piezoelectric accelerometers (PA) for the registration of accelerations, while the finite element (FE) method was used for the numerical analysis. The paper compares experimental and numerical responses with the intention to discuss the accuracy limits of experimental and numerical approaches. Introduction The experimental investigation of high-speed phenomena accompanying the stress wave propagation in solids is a difficult task. Preparing and carrying out the experiment is expensive both in terms of required sophisticated hardware, material costs and manpower resources; furthermore the satisfactory reproducibility is hard to achieve in microsecond time scales. On the other hand employing the FE method for treatment of stress wave propagation in linear elastic continuum is a well reproducible routine, even if it is highly time and memory consuming. A lot of finite element results could be generated easily after the initial exertion is invested in proper design of the FE model. Still the detailed evaluation of finite element results requires additional both menial and mental effort. The former stems from the fact that the data sets needed for comparison with experimental data have to be mined out from extensive data files generated for every node at each time step. The latter emanates from an impossibility to distinguish precisely between the actual fast-frequency phenomena and spurious side effects due to time and space discretizations.

000004121 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000004121 653__ $$a

000004121 7112_ $$aEngineering Mechanics 2004$$cSvratka (CZ)$$d2004-05-10 / 2004-05-13$$gEM2004
000004121 720__ $$aPták, S.$$iTrnka, J.$$iOkrouhlík, M.
000004121 8560_ $$ffischerc@itam.cas.cz
000004121 8564_ $$s21892070$$uhttps://invenio.itam.cas.cz/record/4121/files/T-Ptak-Svatopluk.pdf$$y
             Original version of the author's contribution as presented on CD, .
            
000004121 962__ $$r4009
000004121 980__ $$aPAPER