کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6748681 1430213 2015 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Rate dependent fracture of a double cantilever beam with combined bulk and interfacial dissipation
ترجمه فارسی عنوان
شکستگی وابسته به سرعت یک پرتو دو سیلندر با انبساط ترکیبی فله و فضایی است
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی
The energy required to fracture viscoelastic media is known to depend on the rate of crack propagation. In this work, crack propagation, driven by applied moments¸ in an idealized model of a viscoelastic double cantilever beam (DCB) is studied. Rate dependency is taken into account through a standard linear solid viscoelastic model for the bulk material, and an adhesive zone model describing bond rupture kinetics for the polymer chains which bridge the interface. Attractive van der Waals (vdW) forces are also taken into account within the adhesive zone. The apparent energy release rate consists of two parts: the energy to overcome adhesion on the interface as well as viscous dissipation in the bulk. The adhesive energy in rupturing polymer chains increases as crack propagation speed increases. Relaxation of the bulk material causes viscous dissipation as stored strain energy is lost. For a beam of fixed length this dissipation was found to be negligible at high and low rates of crack propagation. Between these two limits there is a critical crack propagation speed where viscous dissipation is maximized.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Solids and Structures - Volumes 75–76, 1 December 2015, Pages 277-286
نویسندگان
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