Thermo‐mechanical fluid‐structure interaction for thermal buckling

Martin, Katharina; Reese, Stefanie

doi:10.1002/pamm.201900456

Cited by 2 publications

(3 citation statements)

References 5 publications

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“…The present study is a follow-up to these experiments. The obtained data will serve as reference for improved thermoplastic coupled simulations by [37]. The overview given in this paper is based on the full results published in [7].…”

Section: High Temperature Fsimentioning

confidence: 99%

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Experiments on Aerothermal Supersonic Fluid-Structure Interaction

Daub

Willems

Esser

et al. 2020

Notes on Numerical Fluid Mechanics and Multidisciplinary Design

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Mastering aerothermal fluid-structure interaction (FSI) is crucial for the efficient and reliable design of future (reusable) launch vehicles. However, capabilities in this area are still quite limited. To address this issue, a multidisciplinary experimental and numerical study of such problems was conducted within SFB TRR 40. Our work during the last funding period was focused on studying the effects of moderate and high thermal loads. This paper provides an overview of our experiments on FSI including structural dynamics and thermal effects for configurations in two different flow regimes. The first setup was designed to study the combined effects of thermal and pressure loads. We investigated a range of conditions including shock-wave/boundary-layer interaction (SWBLI) with various incident shock angles leading to, in some cases, large flow separation with high amplitude temperature dependent panel oscillations. The respective aerothermal loads were studied in detail using a rigid reference panel. The second setup allowed us to study the effects of severe heating leading to plastic deformation of the structure. We obtained severe localized heating resulting in partly plastic deformations of more than 12 times the panel thickness. Furthermore, the effects of repeated load cycles were studied.

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Section: High Temperature Fsimentioning

confidence: 99%

“…To address this issue, a multidisciplinary experimental and numerical study of such problems was conducted within SFB TRR 40 [23,26,37,44,45,60].…”

Section: Introductionmentioning

confidence: 99%

Experiments on Aerothermal Supersonic Fluid-Structure Interaction

Daub

Willems

Esser

et al. 2020

Notes on Numerical Fluid Mechanics and Multidisciplinary Design

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show abstract

“…Shell elements are used for the panel and continuum elements for the isolation and frame, respectively. Finite elements based on reduced integration with hourglass stabilization are used for the spatial discretization [19].…”

Section: Structural Modelmentioning

confidence: 99%

Numerical Modelling of Fluid-Structure Interaction for Thermal Buckling in Hypersonic Flow

Martin

Daub

Esser

et al. 2020

Notes on Numerical Fluid Mechanics and Multidisciplinary Design

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Experiments have shown that a high-enthalpy flow field might lead under certain mechanical constraints to buckling effects and plastic deformation. The panel buckling into the flow changes the flow field causing locally increased heating which in turn affects the panel deformation. The temperature increase due to aerothermal heating in the hypersonic flow causes the metallic panel to buckle into the flow. To investigate these phenomena numerically, a thermomechanical simulation of a fluid-structure interaction (FSI) model for thermal buckling is presented. The FSI simulation is set up in a staggered scheme and split into a thermal solid, a mechanical solid and a fluid computation. The structural solver Abaqus and the fluid solver TAU from the German Aerospace Center (DLR) are coupled within the FSI code ifls developed at the Institute of Aircraft Design and Lightweight Structures (IFL) at TU Braunschweig. The FSI setup focuses on the choice of an equilibrium iteration method, the time integration and the data transfer between grids. To model the complex material behaviour of the structure, a viscoplastic material model with linear isotropic hardening and thermal expansion including material parameters, which are nonlinearly dependent on temperature, is used.

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Thermo‐mechanical fluid‐structure interaction for thermal buckling

Cited by 2 publications

References 5 publications

Experiments on Aerothermal Supersonic Fluid-Structure Interaction

Experiments on Aerothermal Supersonic Fluid-Structure Interaction

Numerical Modelling of Fluid-Structure Interaction for Thermal Buckling in Hypersonic Flow

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