• Title/Summary/Keyword: national production

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DISTRIBUTIONS OF RESIDUAL STRESSES IN DIFFUSION BONDING OF DISSIMILAR MATERIALS TIAL TO STEEL 40CR

  • Peng, He;Jicai, Feng;Yiyu, Qian;Jiecai, Han
    • Proceedings of the KWS Conference
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    • 2002.10a
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    • pp.785-790
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    • 2002

  • Distributions of residual stress in diffusion bonding of dissimilar materials intermetallics TiAl to steel 40Cr were simulated by FEM calculation. Results showed that destructive residual stresses presented in the minute area adjacent to bond-line of the base material with smaller coefficient of thermal expansion. Reducing bonding temperature and diminishing bonding time are in favor of the mollification of interface tresses.

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Development of Mechanized System Model for the Production of Winter Cereal Wrap Silage in the Fallow Paddy Field(3) - Application Test of Mechanized Wrap Silage Production in the Fallow Paddy Field - (답리작 맥류 랩-사일리지의 기계화 시스템 모델 개발(3) - 답리작 맥류 랩-사일리지 기계화 생산의 적응 시험 -)

  • 김혁주;박경규;하유신;홍동혁;나규동;서상훈
    • Journal of Biosystems Engineering
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    • v.29 no.1
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    • pp.1-8
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    • 2004

  • In order to solve the shortage of roughage supply for dairy farm in Korea, winter cereal forage production after harvesting of rice in the fallow paddy field was studied. Two parts are already reported at the previous paper - One was the model development of the mechanized production, and the other was the study of feasibility of the model and its desirable direction in Korea. In this study, the model system is applied for a winter cereal wrap silage production model to practice in Kyungbook National University farm on 3ha scale for 3 years. Results of the research are summarized as follows; It takes 2 or 3 working days to process the wrap silage in middle of May in Daegu region. Also, not much particular problem can be found during the application test of mechanized wrap silage production. Field capacity and field efficiency are estimated to be 0.6-0.85㏊/h and 50-70% in mowing, 1.1∼1.7㏊/h and 52∼80% in tedding and raking, 0.6∼1.1㏊/h and 25∼45％ in baling and 0.5∼0.57㏊/h and 75∼85% in wraping, respectively. Total production cost is estimated to be 1,257won/kg-TDN in oversowing and wrap-silage harvest in 1.6㏊ working area. As a result, large scale field is recommended to produce the wrap silage in order to maximize the field capacity.

  • https://doi.org/10.5307/JBE.2004.29.1.001 인용 PDF KSCI