| Thermomechanical Characteristics for Structural Material of Supersonic Vehicle |
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Jong-Hwan Kim, Kee-Bhum Lee, Kuong-Yong Lee |
| 초음속 비행체 구조재료에 대한 열기계적 특성 |
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김종환, 이기범, 이경용 |
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국방과학연구소 |
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| Abstract |
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The thermomechanical characteristics were evaluated for 17-4PH stainless steel widely used in supersonic airframe subjected to both aerodynamic loading and heating. The thermomechanical tests were conducted under both elevated temperature and rapid heating condition from $1^{circ}C/sec;to;28^{circ}C/sec$. The thermomechanical behaviors under rapid heating were compared with those of elevated temperature after 1/2 hour exposure in terms of yield stress to investigate the influence of heating rates. A heating rate-yield temperature parameter was suggested for rapid heating based on time-temperature parameters, and master yield stress curve was obtained by using these parameters. The experimental results and methodology from this study can be used as basic engineering data when designing supersonic vehicle structures subjected to aerodynamic loading and severe heating environment. |
| Key Words:
Aerodynamic Heating, Rapid Heating, Yield Stress, Yield Temperature, Thermomechanical Characteristics, Heating Rate-Yield Temperature Parameter |
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