| 제목 |
점용접 표준시편에 대한 가속내구시험법의 적용 |
| 분야 |
생산기술 |
| 언어 |
Korean |
| 저자 |
김관주(홍익대학교), 조성산(홍익대학교), 정진성(홍익대학교) |
| Key Words |
Accelerated vibration testing(가속내구시험법), Fatigue(피로), Stress amplification(응력 증폭) |
| 초록 |
It is advantage of accelerated vibration testing to compress service exposures to operating vibration into a reduced laboratory test by increasing the amplitude or frequency of the applied input excitations. This paper proposes an accelerated test method to estimate the high-cycle fatigue life under random excitation. The method consists of conducting a test with amplified input excitation and extrapolating linearly the life in the accelerated condition into the real life in field condition. The extrapolation is carried out applying the high-cycle irregular excitation fatigue theory including the rainflow counting, Miner's damage accumulation rule, and Goodman's mean stress correction. As a verification, those estimated life is compared with that acquired by experiment for the simple case of spot welding specimen with good agreement. This testing procedure will provide an useful scheme that can reduce testing period associated with developing time schedule of new product. |
| 원문(PDF) |
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