کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7899617 | 1510349 | 2018 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fracture of silica aerogels: An all-atom simulation study
ترجمه فارسی عنوان
شکستگی های آلیاژل سیلیکا: یک مطالعه شبیه سازی اتمسفر
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
چکیده انگلیسی
Silica aerogels are highly nano-porous and fragile solids, which exhibit brittle properties under tensile loading. In this work, molecular dynamics simulations with a model size up to 5.07 million atoms have been performed to investigate the effect of the crack length to height ratio on the fracture strength, fracture toughness and strain energy release rate. For a wide range of densities from 295 to 1155â¯kgâ¯mâ3, we demonstrate that the fracture toughness and the strain energy release rate at the onset of the crack propagation increase with the crack length to height ratio. Moreover, these fracture properties were found to exhibit a power law dependence on the aerogel density with exponent values of 2.02â¯Â±â¯0.05 for the fracture toughness and 1.16â¯Â±â¯0.04 for the strain energy release rate. The investigations presented grant a more comprehensive understanding of the fracture behavior and provide a mechanistic basis for reliable applications of silica aerogels.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 498, 15 October 2018, Pages 125-129
Journal: Journal of Non-Crystalline Solids - Volume 498, 15 October 2018, Pages 125-129
نویسندگان
Sandeep P. Patil, Ameya Rege, Mikhail Itskov, Bernd Markert,