J. Korean Ceram. Soc. > Volume 33(3); 1996 > Article
 Journal of the Korean Ceramic Society 1996;33(3): 321.
 열피로시험중 질화규소 와류실에 발생하는 응력해석 김창삼, 정덕수 한국과학기술연구원 Stress Analysis of $Si_3N_4$ Swirl Chamber during Thermal Fatigue Test ABSTRACT Thermal fatigue test and stress analysis of Si3N4 and metal swirl chamber were carried out to investigate the reliability of the swirl chambers. Conditions of the thermal fatigue test were severer than those in real engine and FEM was used to analize the stress distribution in the swirl chambers. Fatigue cracks of the maximum length 2.4 mm and deformation were occurred at the corner of the jet in metal swirl chamber but not observed in Si3N4 swirl chamber. Maximum tensile stress in Si3N4 swirl chamber calculated by FEM was 300 MPa. Key words: $Si_3N_4$ swirl chamber, Thermal fatigue test, FEM, Fatigue crack, Reliabillty
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