Document Type

Presentation

Journal/Book Title/Conference

American Society for Composites 39th Annual Technical Conference

Location

San Diego, CA

Publication Date

10-22-2024

First Page

1

Last Page

16

Abstract

Carbon-fiber reinforced polymer (CFRP) composites are commonly used in high performance applications. Although offering several advantages (i.e., superior specific properties and improved structural rigidity), traditional CFRP composites often exhibit poor thermal stability due to a low matrix thermal decomposition temperature. The effective operating temperature of the CFRP composites can be raised by applying an outermost, protective thermal barrier coating (TBC) layer. Prefabricated high void content ceramic TBCs are ideal for composite applications due to their high thermal stability and relatively low thermal conductivity. In this paper, the thermo-mechanical response of the TBCCFRP composite laminate subjected to 500°C are assessed through a multiscale framework based on micromechanics and finite element analysis: the NASA Multiscale Analysis Tool (NASMAT) and ABAQUS are used herein. The homogenized material properties from NASMAT are transferred to an ABAQUS transient heat transfer model to assess the thermal barrier performance of a TBC layer and understand corresponding temperature distributions in the underlying CFRP laminate. In this framework, the NASMAT micromechanics model can predict the through-the-thickness thermal conductivities of the TBC with a 0.020 W/m/K variation and CFRP laminate with a 0.143 W/m/K variation from the experimental results of 3.38 W/m/K and 0.61 W/m/K, respectively. The predicted back face CFRP temperatures from pristine CFRP and TBC-CFRP laminates are consistent with experimental results (<3% difference). This work represents the first step towards developing a reliable multiscale framework for simulating the performance of thermal barrier coated CFRP composites operating at high temperatures.

Comments

Published for the American Society for Composites 39th Annual Technical Conference

2024: https://sites.google.com/view/2024asc-sandiego/home

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