کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7208491 1469103 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Damage mechanisms in uniaxial compression of single enamel rods
ترجمه فارسی عنوان
ساز و کار آسیب در فشرده سازی یکنواخت میله های مینای دندان
کلمات کلیدی
مینا محلی سازی فشار، آرایش غیر یکنواخت، مکانیزم آسیب،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی پزشکی
چکیده انگلیسی
Enamel possesses a complex hierarchical structure, which bestows this tissue with unique mechanical properties. In this study, the mechanical behavior of single enamel rods was investigated under uniaxial compression. Numerical simulations were also performed using micromechanics models for individual enamel rods to identify the damage mechanisms contributing to the constitutive behavior. Experimental results showed that the single rods exhibited an elastic modulus ranging from 10~31 GPa, and that they undergo post-yield strain-hardening. The primary damage mode consisted of delamination within the assembly of mineral crystals. Results from numerical simulations suggest that strain localization within individual rods is responsible for the observed delamination, which is believed to arise from the non-uniform arrangement of mineral crystals. This mechanism was independent of mineral morphology and properties. The non-uniform crystal arrangement results in friction between crystals with different inclination angles and is believed to be responsible for the post-yield strain hardening behavior.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the Mechanical Behavior of Biomedical Materials - Volume 42, February 2015, Pages 1-9
نویسندگان
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