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RISS 인기검색어
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- 저자 : 정승택(Seung Tack Jung) (검색결과 7 건)
- 무료
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- 유료
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정승택(Jung, Seung-Tack),김현기(Kim, Hyun-Gi),김성찬(Kim, Sung-Chan),이종원(Lee, Jong-Won),황인희(Hwang, In-Hee),신동우(Shin, Dong-Woo),정태경(Chung, Tea-Kyung),하병근(Ha, Byoung-Gun) 한국산학기술학회 2010 한국산학기술학회 학술대회 Vol.- No.-
회전익 항공기의 연료탱크는 피탄으로 인해 연료 누유시 발생할 수 있는 화염으로부터 기체와 승무원의 생존성을 높이기 위하여 연료누설을 차단하는 자기밀폐 기능이 필수적으로 요구된다. 자기밀폐 기능은 내부에 적층된 자기밀폐 소재가 누설되는 연료와 화학반응을 일으켜 급속히 팽창됨으로써 피탄부를 막아, 연료누설을 차단하는 역할을 한다. 본 연구는 미군사규격(MIL-DTL-27422D) 기준으로 국내에서 제작 및 수행한 회전익 항공기의 연료탱크 자기밀폐 성능시험 평가 결과를 제시한다.
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ESPI를 이용한 반도체 패키지 내부결함 검사에 관한 연구
정승택(Seung-Tack Jung),김경석(Koung-Suk Kim),양승필(Seung-Pil Yang),정현철(Hyun-Chul Jung),이유황(You-Hwang Lee) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.11
Computer is a very powerful machine which is widely using for data processing, DB construction,<br/> peripheral device control, image processing etc. Consequently, many researches and developments ha<br/> ve progressed for high performance processing unit, and other devices. Especially, the core units suc<br/> h as semiconductor parts are rapidly growing so that high-integration, high-performance, microminiat<br/> turization is possible. The packaging in the semiconductor industry is very important technique to de<br/> determine the performance of the system that the semiconductor is used. In this paper, the inspectio<br/> n of the inner defects such as delamination, void, crack, etc. in the semiconductor packages is studi<br/> ed. ESPI which is a non-contact, non-destructive, and full-field inspection method is used for the in<br/> ner defect inspection and its results are compared with that of C-Scan method.
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이승규(Seung Gyu Lee),정승택(Seung Tack Jung),양진열(Jin Yeol Yang),김성찬(Sung Chan Kim),안석민(Seok Min Ahn),송정헌(Jung Chen Song) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10
A performance of aircraft landing gear is estimated by analysis and verified by drop test. In this paper, a drop test facility is introduced and KC-100 landing gear drop test is presented.
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김현기(Hyun-Gi Kim),김성찬(Sung Chan Kim),이종원(Jong-Won Lee),황인희(In-Hee Hwang),정승택(Jung, Seung Tack),심대성(Shim, Dai Sung) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10
Crashworthy fuel cells have been widely implemented to rotorcraft and rendered a great contribution for improving the survivability of crews and passengers. Since the embryonic stage of military rotorcraft history began, the US army has developed and practised a detailed military specification documenting the unique crashworthiness requirements for rotorcraft fuel cells to prevent most fatality due to post-crash fire. Foreign manufacturers have followed their long term experience to develop their fuel cells, and have reflected the results of crash impact tests on the trial-and-error based design and manufacturing procedures. Since the crash impact test itself takes a long-term preparation efforts together with costly fuel cell specimens, a series of numerical simulations of the crash impact test with digital mock-ups is necessary even at the early design stage to minimize the possibility of trial-and-error with full-scale fuel cells. In the present study a number of numerical simulations on fuel cell crash impact tests are performed with a crash simulation software, Autodyn. The resulting equivalent stresses are further analysed to evaluate a number of appropriate design parameters and the artificial neural network and simulated annealing method are simultaneously implemented to optimize the crashworthy performance of fuel cells.
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Shearography를 이용한 타이어 내부결함의 정량평가 및 진전 모니터링
김경석,정승택,김종수,유득남 한국비파괴검사학회 2003 학술대회 논문집 Vol.- No.1
In recent years, shearogrpahy has significantly improved capabilities in the areas of unbond and separation detection in tires. Although shearography has many advantages for qualitative evaluation, the technique remains the problem of quantitative analysis of inside defects, because shearography needs several effective factors including the amount of shearing, shearing direction and induced load, which exist as barrier for the quantitative analysis of inside defects. In this study, the factors were optimized and the size of cracks inside of tire has been quantitatively determined. Since the factors are highly dependent on inspectors skill and also affect the in-situ workability.
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