000013433 001__ 13433
000013433 005__ 20161114165553.0
000013433 04107 $$aeng
000013433 046__ $$k2011-05-25
000013433 100__ $$aVarelis G., E.
000013433 24500 $$aSimulation of Industrial Elbow Response Under Strong Cyclic Loading

000013433 24630 $$n3.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013433 260__ $$bNational Technical University of Athens, 2011
000013433 506__ $$arestricted
000013433 520__ $$2eng$$aElbow components are widely used in industrial facilities as parts of piping/tubing systems. Their performance under severe loading conditions may be critical for the structural integrity of an industrial facility In the case of an earthquake event in addition to other service loads, such as internal pressure, they are subjected to strong repeated cyclic structural loading. When these elements are subjected to strong repeated loading, they present failure modes associated with cyclic plasticity phenomena (material degradation or cyclic creep). Furthermore, due to their flexibility, significant non-linearities occur and the elbow crosssection shape distorts as cyclic loading takes place resulting at an oval or flatten shape at the end of the loading sequence. Accumulation of plastic strains (cyclic creep or ratcheting) also takes place at the most stressed parts of the element, associated with extensive bulging of the cross-section which is more pronounced in the presence of internal pressure. The present study is numerical, based on a finite element simulation of the elbow, and investigates the elbow component behavior subjected to strong cyclic bending of various amplitudes in the presence of different levels of internal pressure. The material constitutive model has a dominant effect on the elbow response, and this is shown trough the use of 3 different plasticity models. The capabilities and drawbacks of each plasticity model regarding the simulation of cyclic plasticity phenomena are discussed in detail.

000013433 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013433 653__ $$aPiping, elbows, cyclic plasticity, seismic loading, buckling, ratcheting, finite elements.

000013433 7112_ $$aCOMPDYN 2011 - 3rd International Thematic Conference$$cIsland of Corfu (GR)$$d2011-05-25 / 2011-05-28$$gCOMPDYN2011
000013433 720__ $$aVarelis G., E.$$iPappa, P.$$iKaramanos, S.
000013433 8560_ $$ffischerc@itam.cas.cz
000013433 8564_ $$s4565944$$uhttps://invenio.itam.cas.cz/record/13433/files/100.pdf$$yOriginal version of the author's contribution as presented on CD, section: MS 23 Seismic Analysis and Design of Industrial Facilities and Pipelines.
000013433 962__ $$r13401
000013433 980__ $$aPAPER