Intrinsic failure and non-linear elastic behavior of glasses
Intrinsic failure and non-linear elastic behavior of glasses
复制标题
玻璃的固有失效和非线性弹性行为
DOI：
10.1016/j.jnoncrysol.2005.05.029
复制
发表时间：
2005
影响因子：
3.5
通讯作者：
C. Kurkjian
中科院分区：
文献类型：
--
作者：
P. Gupta;C. Kurkjian
用两点弯曲技术测量的精心制备的玻璃纤维的惰性破坏应变很大。例如，石英纤维的破坏应变约为18%。为了将如此高的应变转换为应力，必须考虑杨氏模量的应变依赖性（即玻璃的非线性弹性行为）。然而，大多数玻璃的模量实验值仅适用于低应变（通常<2%）。在本文中，我们提出了玻璃的非线性弹性行为的描述，直到并包括四阶模量是必要的和充分的，以转换固有的破坏应变到破坏强度。我们通过比较纯张力下测量的纤维强度与计算值来检验所提出公式的有效性-使用所提出的形式-从两点弯曲中测量的两种玻璃成分（二氧化硅和e -玻璃）的固有破坏应变，所有必要的数据都可以在已发表的文献中获得。
Inert failure strains of carefully prepared glass fibers, measured by using the two-point bending technique, are large. For example, the failure strain is about 18% for silica fibers. To convert such high strains to stresses, the strain dependence of the Young’s modulus (i.e., non-linear elastic behavior of glass) has to be taken into account. However, experimental values of modulus for most glasses are available only for low strains (typically <2%). In this paper, we propose that a description of the non-linear elastic behavior of glass up to and including the fourth-order modulus is necessary and adequate for converting intrinsic failure strains to failure strengths. We examine the validity of the proposed formulation by comparing the measured fiber strengths in pure tension to the values calculated – using the proposed formalism – from measured intrinsic failure strains in two-point bending for two glass compositions (silica and E-glass) for which all necessary data are available in the published literature.