000013711 001__ 13711
000013711 005__ 20161114170252.0
000013711 04107 $$aeng
000013711 046__ $$k2011-05-25
000013711 100__ $$aMakinen, J.
000013711 24500 $$aDynamic Collapse Simulation of Flexible Multibody Systems with Plasticity Effects

000013711 24630 $$n3.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013711 260__ $$bNational Technical University of Athens, 2011
000013711 506__ $$arestricted
000013711 520__ $$2eng$$aIn this paper, a method for modelling the dynamic collapse of flexible multibody systems using a non-linear finite element method is presented. The flexible multibody system is assembled by Reissner’s geometrically exact beam elements and mass elements [1]. The primary interest is to model and simulate hydraulic-driven multibody systems under oversized load causing a failure. These collapse simulations can be utilized in the accident analyses or the detection of the device in the extreme conditions that could advise in design. The hydraulic system, and especially hydraulic cylinder, is modelled by a length controlled bar element [1]. In order to model the failure, an elasto- plastic material model is required. Since plastic material model should be robust to utilize the material model in simulations, a stress resultant formulation is introduced. In the plane case, the Reissner’s beam element has three stress resultants: normal and shear force vectors and a bending moment. The stress resultant formulation avoids the through-thickness integration. However, the yield surface depends on the shape of the cross-section. In this paper, the study is restricted to rectangular hollow cross-sections and a stress resultant formulation for elasto-plastic material is introduced. In addition, the stress resultant formulation is verified by a through-thickness integration procedure. The governing equations of motion in the dynamic case are solved by using the implicit Newmark time integration method. A numerical example considering the hydro-mechanical flexible multibody system is presented where a heavy load with sudden stop of hydraulic cylinder causes the collapse of the system. In this example, dynamic effects in the limit load are evident. 

000013711 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013711 653__ $$a

000013711 7112_ $$aCOMPDYN 2011 - 3rd International Thematic Conference$$cIsland of Corfu (GR)$$d2011-05-25 / 2011-05-28$$gCOMPDYN2011
000013711 720__ $$aMakinen, J.$$iCardona, A.$$iKouhia, R.$$iMarjamaki, H.
000013711 8560_ $$ffischerc@itam.cas.cz
000013711 8564_ $$s9341$$uhttps://invenio.itam.cas.cz/record/13711/files/557.pdf$$yOriginal version of the author's contribution as presented on CD, section: MS 04 Advances in Numerical Methods for Linear and Nonlinear Dynamics.
000013711 962__ $$r13401
000013711 980__ $$aPAPER