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열화상기술을 이용한 모멘트 변화에 따른 피로균열진전 연구
김경석,정현철,박찬주,정덕운,장호섭,Kim, Kyeong-Suk,Jung, Hyun-Chul,Pack, Chan-Joo,Jung, Duk-Woon,Chang, Ho-Sub 한국생산제조학회 2010 한국생산제조학회지 Vol.10 No.6
The objective of this study is to propose an effective method for measurement and analysis of fatigue crack. A technique that can measure the statue of fatigue crack propagation fast and correctly for enhancing safety of constructions and securing reliability is necessary. Moreover, the crack propagation behavior characteristics evaluation technique has to be developed using this technique. In this paper, fatigue crack was caused via the fatigue experiment with repeated load on the CT specimen that is made up of STS304. Fatigue crack propagation was measured by tracing the position of the maximum temperature according to the cycles using infrared thermography. The crack growth characteristics was evaluated by applying the moment values on the measuring area to the measured value. As a result of this study, the possibility that the infrared thermography could be applied to measure the fatigue crack was identified. Moreover, it was identified that fatigue crack propagation have a relationship with the moment value of construction.
광학식 3차원 측정을 이용한 LCD 판넬의 프레스 금형 공정별 변형 측정
김경석(Kyeong-Suk Kim),홍성성(Sung-Sung Hong),김동수(Dong-Soo Kim),정덕운(Duk-woon Jung),김우진(Woo-Jin Kim),송재근(Jae-geun Song),장호섭(Ho-Seob Chang) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
LCD panel when molded into a press mold Depending on the type and purpose of the panels will pass several processes. At this point LCD panel inside the case of uneven load As a result, the shape of the product will be transformed. If the image on the LCD panel deformation Products, does not function as It is important to identify the degree of deformation is. Typical methods to measure is the shape Moire method in which the approach has drawbacks. LCD panel when molded into a press mold in the form of panels and goes through different processes depending on usage. At this time inside the LCD panel in the event of uneven loading of the resulting product is transformed shape.