서지주요정보
피로균열열림점 결정방법에 관한 연구 = A study on determination-methods of fatigue crack opening level
서명 / 저자 피로균열열림점 결정방법에 관한 연구 = A study on determination-methods of fatigue crack opening level / 구자석.
발행사항 [대전 : 한국과학기술원, 2002].
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등록번호

8013476

소장위치/청구기호

학술문화관(문화관) 보존서고

DADE 02001

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초록정보

Fatigue crack growth evaluation is very important for the damage tolerant design of machines or structures. It has been widely recognized that fatigue crack growth rate can be well expressed in terms of the effective stress intensity factor range $ΔK_eff$, based on the crack closure concept. In estimating $ΔK_eff$, the most important and difficult part is to determine consistently the crack opening load $K_op$. In this study, a neural network approach proposed by previous researchers is modified to determine more precisely the crack opening level from differential displacement signal curve. Various $K_op$ determination methods are evaluated and compared in a quantitative manner by using new criteria proposed here. The modified neural network approach is found to be very promising for $K_op$ determination. In addition, it is observed that the 2/π and 2/π0 methods proposed by Paris and Donald for estimation of $ΔK_eff$, provide better results, compared with conventional $ΔK_eff$ estimation.

서지기타정보

서지기타정보
청구기호 {DADE 02001
형태사항 xii, 105 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Ja-suk Koo
지도교수의 한글표기 : 송지호
지도교수의 한글표기 : Ji-Ho Song
수록잡지명 : "Determination of crack opening level and estimation of effective stress intensity factor range". International journal of fatigue
학위논문 학위논문(박사) - 한국과학기술원 : 자동화및설계공학학제전공,
서지주기 참고문헌 : p. 48-50
주제 피로균열열림점
피로균열닫힘현상
유효응력강도계수폭
감산변위신호
신경회로망
fatigue crack opening level
fatigue crack closure
effective stress intensity factor range
differential displcement
neural network
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