کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7208690 | 1469106 | 2014 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Micromechanical characterization of prismless enamel in the tuatara, Sphenodon punctatus
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی پزشکی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Dental enamel - a naturally occurring biocomposite of mineral and protein - has evolved from a simple prismless to an advanced prismatic structure over millions of years. Exploring the mechanical function of its structural features with differing characteristics is of great importance for evolutionary developmental studies as well as for material scientists seeking to model the mechanical performance of biological materials. In this study, mechanical properties of prismless tuatara Sphenodon punctatus enamel were characterized. Using micro-cantilever bending samples the fracture strength and elastic modulus were found to be 640±87 MPa and 42±6 GPa, respectively in the orientation parallel to the crystallite long axis, which decreased in the orthogonal direction. The intrinsic fracture toughness of tuatara enamel ranged from 0.21 MPa m1/2 and 0.32 MPa m1/2. These values correspond to the lower limit of the range of values observed in prismatic enamel at the hierarchical level 1.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the Mechanical Behavior of Biomedical Materials - Volume 39, November 2014, Pages 210-217
Journal: Journal of the Mechanical Behavior of Biomedical Materials - Volume 39, November 2014, Pages 210-217
نویسندگان
Ezgi D. Yilmaz, Sabine Bechtle, Hüseyin Ãzcoban, Jules A. Kieser, Michael V. Swain, Gerold A. Schneider,