Thermal Protection System (TPS) are subjected to complex environments, with high heat flux and shear stress caused by the external hypersonic flow field. A great amount of uncertainties lies in these environments and often challenge the overall design and sizing. Moreover, the TPS materials inherently contain imperfections and defects that may also lead to uncertainties in the experiments and modeling. In this study, a stochastic approach to reconstruct and assign the material properties is proposed. The results reveal that the variable properties of the materials have large influences on structural responses. In general, the more scatter of the material properties, the more resultant stress is expected. Based on a Monte Carlo approach, results also indicate that 1D model is over-conservative in structural response while 2D and 3D have statistically consistent outcome. Analysis on the reconstructed FiberForm geometry indicates that by accurately modeling the level of scattering, a meso-scale material model can be built based on micro-scale data.
|State||Published - Jan 6 2020|
|Event||AIAA Scitech Forum, 2020 - Orlando, United States|
Duration: Jan 6 2020 → Jan 10 2020
|Conference||AIAA Scitech Forum, 2020|
|Period||1/6/20 → 1/10/20|
Bibliographical noteFunding Information:
This work was supported by NASA SpaceTech-REDDI-2017-ESI-80NSSC18K0261. Schwartzentruber (U. of Minnesota) for facilitating this project.
© 2020, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
ASJC Scopus subject areas
- Aerospace Engineering