Table of Contents Author Guidelines Submit a Manuscript
The Scientific World Journal
Volume 2013, Article ID 324186, 7 pages
http://dx.doi.org/10.1155/2013/324186
Research Article

Numerical Simulation for Thermal Shock Resistance of Thermal Protection Materials Considering Different Operating Environments

1College of Resource and Environment Science, Chongqing University, Chongqing 400030, China
2LTCS and College of Engineering, Peking University, Beijing 100871, China

Received 29 April 2013; Accepted 14 July 2013

Academic Editors: C.-Q. Hong, F. Oktar, and S. Ueda

Copyright © 2013 Weiguo Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Based on the sensitivities of material properties to temperature and the complexity of service environment of thermal protection system on the spacecraft, ultrahigh-temperature ceramics (UHTCs), which are used as thermal protection materials, cannot simply consider thermal shock resistance (TSR) of the material its own but need to take the external constraint conditions and the thermal environment into full account. With the thermal shock numerical simulation on hafnium diboride (HfB2), a detailed study of the effects of the different external constraints and thermal environments on the TSR of UHTCs had been made. The influences of different initial temperatures, constraint strengths, and temperature change rates on the TSR of UHTCs are discussed. This study can provide a more intuitively visual understanding of the evolution of the TSR of UHTCs during actual operation conditions.