The Study of Optimum Shape to Evaluation for Thermal Shock Behavior of Graphite

Abstract:

Article Preview

The purpose of the present study is to evaluate thermal shock properties of the ATJ graphite using laser irradiation techniques. Cracks of thermal shock specimens are initiated by maximum tensile stress field. Thermal shock resistance of the ATJ graphite is correlated with thermal parameter and mechanical property. To simulate the thermal stress conditions of rocket nozzle throat for the evaluation of the thermal shock resistance of ATJ graphite, the laser irradiation was applied at the central area of disk specimen. Thermal shock resistance was related to the geometry, the maximum stress, and the thermal and mechanical property. Also the analyses of transient temperature and thermal stress were performed by the finite element method with nonlinear code ABAQUS. Analyses were specially performed for several kinds of shape to determine the minimum power density which could be cracked the specimen. The shape of the thermal shock specimen which was cracked under the lower power density was obtained and the result will be proved to the test.

Info:

Periodical:

Key Engineering Materials (Volumes 326-328)

Edited by:

Soon-Bok Lee and Yun-Jae Kim

Pages:

915-918

DOI:

10.4028/www.scientific.net/KEM.326-328.915

Citation:

S. H. Koo and Y. S. Lee, "The Study of Optimum Shape to Evaluation for Thermal Shock Behavior of Graphite", Key Engineering Materials, Vols. 326-328, pp. 915-918, 2006

Online since:

December 2006

Export:

Price:

$35.00

[1] S. Sato, A. Kurumada, K. Shirota, N. Saito, Journal of the Japan Society for aeronautical and space sciences, Vol. 32, No. 370, p.651 (1984).

[2] S. Sato, K. Sato, Y. Imamura, J. Kon, Carbon, Vol. 13, 309 (1975).

[3] S. Sato, H. Awaji, H. Akuzawa, Carbon, Vol. 16, 103 (1978).

[4] S. Akiyama, S. Amada, Ceramic International, Vol. 27, 171 (2001).

[5] The Industrial Graphite Engineering Handbook, Carbon Company Inc. Figure 7: SEM images (×150) of thermal shock resistance specimen of the thickness 1. 5mm (type B) irradiated with laser power of (a) 2. 5kW and (b) 2. 7kW.

In order to see related information, you need to Login.