کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5183069 1381007 2012 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mitigation of fatigue damage in self-healing vascular materials
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Mitigation of fatigue damage in self-healing vascular materials
چکیده انگلیسی

The fatigue response of an epoxy matrix containing vasculature for the delivery of liquid healing agents is investigated. The release of a rapidly curing, two-part epoxy healing chemistry into the wake of a propagating crack reduces the rate of crack extension by shielding the crack tip from the full range of applied stress intensity factor. Crack propagation is studied for a variety of loading conditions, with the maximum applied stress intensity factor ranging from 62 to 84% of the quasi-static fracture toughness of the material. At the highest level of applied load, the rate of mechanical damage is so fast that the healing agents do not fully mix and polymerize, and the effect of healing is minimal. The self-healing response is most effective at impeding the slower propagating cracks, with complete crack arrest occurring at the lowest level of applied load, and reductions of 79-84% in the rate of crack extension at intermediate loads.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 53, Issue 24, 9 November 2012, Pages 5575-5581
نویسندگان
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