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국내 최대 정보 기계·건설 공학연구정보센터
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    국내학술지 제목 게시판 내용
    제목(국문)
    제목(영문) Correlation Between Mechanical Properties Degradation and Discoloration of Epoxy Polymer by Solar Radiation Exposure
    저자 이상봉 (S.B.Lee ,한국항공대학교 항공우주 및 기계공학부 ) ▷공저자네트워크등록하기
    이동전 (Donggeon Lee ,School of Aerospace and Mechanical Engineering, Korea Aerospace University ) ▷공저자네트워크등록하기
    김명준 (- ,School of Aerospace and Mechanical Engineering, Korea Aerospace University ) ▷공저자네트워크등록하기
    강태엽 (Taeyeop Kang ,School of Aerospace and Mechanical Engineering, Korea Aerospace University ) ▷공저자네트워크등록하기
    이수영 (Sooyong Lee ,School of Aerospace and Mechanical Engineering, Korea Aerospace University ) ▷공저자네트워크등록하기
    - (Jungsun Park ,School of Aerospace and Mechanical Engineering, Korea Aerospace University ) ▷공저자네트워크등록하기
    초록
    초록(영문)

    Many materials used for industrial, architectural or logistics systems are exposed to various environmental factors such as temperature, humidity and solar radiation. In particular, solar radiation is a primary concern regardless of weather or season. It causes changes in mechanical properties, the generation of cracks in concrete, color fading in clothing and plastic, and so on. This paper demonstrates some of these effects. To do this, the authors used an artificial solar radiation test apparatus to examine epoxy polymer specimens. The apparatus included a number of metal halide and infrared lamps, which simulated natural solar radiation as per US military testing standards (MIL-STD-810G). 18 specimens were manufactured based on the ASTM-D638 testing method. They were then divided into three groups with six specimens each. Each group was exposed to artificial solar radiation for 28 days, 56 days and 84 days, respectively. To identify the color shift in each specimen, digital images for each specimen group before and after the solar radiation test were obtained prior to the tensile test. The RGand B values were subsequently extracted from these digital images using MATLAB and used to calculate the total color shift between the two specimen states (before and after the solar radiation test) following linear and non-linear formulas. Finally, the authors proposed a method of predicting the extent of the decline in maximum tensile strength. This method employed four mathematical correlation relationships between the maximum tensile strength and the total color shift.

    keyword Solar radiation, Metal halide lamps, Infrared lamps, Epoxy polymer, MIL-STD-810,
    ASTM-D638, RGB values, Total color shift
    저널명 International Journal of Aeronational and Space Sciences ▷관련저널보기
    VOL 19
    PAGE 0843
    발표년도 2018
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