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Fakulteta za strojništvo, Ljubljana (FSLJ)
  • Structural finite element analysis using material model with Prandtl operator approach [Elektronski vir]
    Šeruga, Domen ...
    Fast and accurate simulations are a key feature of a modern R&D process. Although a physical prototype is finally tested to verify the project demands, design engineers usually have to rely on the ... results of simulations on virtual prototypes during the R&D process. Especially durability predictions of mechanical components which operate in the low-cycle fatigue regime of the material decisively depend on the simulation of their structural stress-strain behaviour as a response to the external loading of the structure [1]. In this paper, implementation of the Prandtl operator approach into the finite element method is first outlined. The method enables structural analyses of mechanical components which are loaded by variable mechanical and thermal loads during the operation [2,3,4]. Hence, the temperature dependent stress-strain behaviour of the components can be simulated considering an elastoplastic cyclic response with multilinear kinematic hardening. A Ramberg-Osgood-type description of the stabilised cyclic stress-strain curve of the material requires a small number of material parameters which can be conveniently determined by standard low-cycle fatigue tests or incremental step tests at distinct test temperatures [1,4]. The key feature of the method is the computational power which enables time-efficient simulations of longer thermomechanical load histories. Next, the performance of the method is presented with a simple mechanical component exposed to a variable thermomechanical load history. It is shown that a full 3D stress-strain tensor can be traced throughout the loading history considering both the temperature dependency of the material properties and the cyclic behaviour of the material.
    Vir: LCF9 [Elektronski vir] (Str. 191-196)
    Vrsta gradiva - prispevek na konferenci ; neleposlovje za odrasle
    Leto - 2022
    Jezik - angleški
    COBISS.SI-ID - 114213123

    Povezava(-e):

    https://dvm-wissen.de/gb/lcf9-ninth-international-conference-on-low-cycle-fatigue/205-LCF9-2022-050.html
    DOI

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