ROLE OF POROSITY IN ESTIMATES OF COMPOSITE ELASTIC-CONSTANTS

被引：19

作者：

BERRYMAN, JG

机构：

[1] Lawrence Livermore National Laboratory, Livermore, CA, 94551-9900

来源：

JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME | 1994年 / 116卷 / 02期

关键词：

D O I：

10.1115/1.2906023

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The presence of small amounts of residual void space (on the order of one percent by volume) is sufficient to make estimates of composite elastic constants (obtained while ignoring this porosity) violate the Hashin-Shtrikman bounds in many cases. Experimental values failing below the incorrectly estimated lower bound is the normal direction of violation, but erroneous neglect of porosity in ''pure'' samples can also lead to experimental values rising above the incorrectly computed upper bound. Examples are presented to illustrate the nature of the error and methods of correcting it for data on composite ceramics. The result is improved agreement between the Hashin-Shtrikman bounds, effective medium theory estimates, and experimental data.

引用

页码：87 / 96

页数：10

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