کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9704692 1464180 2005 19 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Non-equilibrium split Hopkinson pressure bar procedure for non-parametric identification of complex modulus
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Non-equilibrium split Hopkinson pressure bar procedure for non-parametric identification of complex modulus
چکیده انگلیسی
A split Hopkinson pressure bar procedure was developed for non-parametric identification of complex modulus under conditions of non-equilibrium and axially non-uniform stress. Two simplified procedures were also established. The first requires low frequency and/or short specimen. The second, identical to a classical procedure based on equilibrium, requires that also the specimen-to-bar characteristic impedance ratio be low. Both overestimate the magnitude of the complex modulus, the second even at low frequencies. Tests were carried out with polymethyl methacrylate and aluminium bars and with polypropylene specimens having diameter 20 mm and lengths 10, 20, 50 and 100 mm. The complex moduli identified are in good to fair agreement with published results up to 10 kHz for all specimens with polymethyl methacrylate bars and for the 10-50 mm specimens with aluminium bars. The quality of the results is sensitive to truncation and to imperfect contact at the bar-specimen interfaces.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Impact Engineering - Volume 31, Issue 9, October 2005, Pages 1133-1151
نویسندگان
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