کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1886340 1533540 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
In-situ strain analysis of potential habitat composites exposed to a simulated long-term lunar radiation exposure
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم تشعشع
پیش نمایش صفحه اول مقاله
In-situ strain analysis of potential habitat composites exposed to a simulated long-term lunar radiation exposure
چکیده انگلیسی
NASA is studying the effects of long-term space radiation on potential multifunctional composite materials for habitats to better determine their characteristics in harsh space environments. Two epoxy-matrix composite materials were selected for the study and were mounted in a test stand that simulated the biaxial stresses of a pressure vessel wall. The samples in the test stand were exposed to radiation at fast (0.1478 krad/s) and slow (0.0139 krad/s) dose rates, and the strain and temperature were recorded during the exposure. During a fast dose rate exposure, negative strain was recorded, decreasing with time, an indication of matrix shrinkage. Given previous radiation studies of polymers, this is expected to be a result of radiation-induced crosslinking in the epoxy matrix. However, with a slow dose rate, the materials exhibited a positive strain that increased with time, corresponding to stretching of the materials. This result is consistent with scission or degradation of the matrix occurring, possibly due to oxidative degradation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Radiation Physics and Chemistry - Volume 84, March 2013, Pages 235-241
نویسندگان
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