کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
594835 1453990 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Size dependent brittle to ductile transition in bubble rafts
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Size dependent brittle to ductile transition in bubble rafts
چکیده انگلیسی

We report on experimental studies of the failure modes of aqueous foam under tension as a function of loading speed and system size. Foam is an example of a viscoelastic material that acts either as a solid or a fluid, depending on the details of the applied deformation. This raises the interesting question of whether foam's failure modes correspond to plastic deformation, viscous flow, or brittle fracture. Using a model foam system, a bubble raft, we observe two distinct failure modes. For high enough deformation rates and large enough ratios of the initial system width to length, brittle fracture is observed. For small deformation rates and ratios of the initial system width to length, plastic pinch-off is observed. For sufficiently small systems, there is a well-defined transition zone in which a competition between pinch-off and fracture is observed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 382, Issues 1–3, 5 June 2011, Pages 36–41
نویسندگان
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