کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5492057 | 1525133 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Mechanical model of giant photoexpansion in a chalcogenide glass and the role of photofluidity
ترجمه فارسی عنوان
مدل مکانیکی از گسترش عظیم عکس در یک شیشه چالکوهناید و نقش فتوولتایی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
چکیده انگلیسی
An analytical model is developed to describe the phenomenon of giant photoexpansion in chalcogenide glasses. The proposed micro-mechanical model is based on the description of photoexpansion as a new type of eigenstrain, i.e. a deformation analogous to thermal expansion induced without external forces. In this framework, it is the viscoelastic flow induced by photofluidity which enable the conversion of the self-equilibrated stress into giant photoexpansion. This simple approach yields good fits to experimental data and demonstrates, for the first time, that the photoinduced viscous flow actually enhances the giant photoexpansion or the giant photocontraction as it has been suggested in the literature. Moreover, it highlights that the shear relaxation time due to photofluidity controls the expansion kinetic. This model is the first step towards describing giant photoexpansion from the point of view of mechanics and it provides the framework for investigating this phenomenon via numerical simulations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 516, 1 July 2017, Pages 85-91
Journal: Physica B: Condensed Matter - Volume 516, 1 July 2017, Pages 85-91
نویسندگان
Manuel Buisson, Yann Gueguen, Romain Laniel, Christopher Cantoni, Patrick Houizot, Bruno Bureau, Jean-Christophe Sangleboeuf, Pierre Lucas,