کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
783307 1464131 2010 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dynamic behaviour of UHMWPE yarns and addressing impedance mismatch effects of specimen clamps
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Dynamic behaviour of UHMWPE yarns and addressing impedance mismatch effects of specimen clamps
چکیده انگلیسی

The dynamic stress–strain behaviour of Spectra® 900 yarns, made of highly oriented ultra-high molecular weight polyethylene (UHMWPE), is determined by means of a tensile split Hopkinson bar arrangement incorporating special grips to clamp the specimens. Test results show that a five-element viscoelastic constitutive model captures the behaviour of Spectra® 900 yarns with good fidelity. Not uncommonly, as in this instance, grips used to clamp specimens introduce an impedance mismatch with the input/output bars, and the design of the clamps may not be amenable to modification to yield an impedance match. Consequently, an algorithm is developed to relate the strain signals from the input/output bars to what is experienced by the grips, and thus what is imposed on the specimen. This enables the extraction of corrected quantities for insertion into the Hopkinson bar equations. The proposed method is validated by finite element analysis.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Impact Engineering - Volume 37, Issue 3, March 2010, Pages 324–332
نویسندگان
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