Effect of porosity on the nonlinear and time-dependent behavior of Ceramic Matrix Composites

被引：25

作者：

Santhosh, Unni ^{[1
]}

Ahmad, Jalees ^{[1
]}

Ojard, Greg ^{[2
]}

Smyth, Imelda ^{[3
]}

Gowayed, Yasser ^{[4
]}

Jefferson, George ^{[5
]}

机构：

[1] Struct Analyt Inc, Carlsbad, CA 92010 USA

[2] United Technol Res Ctr, E Hartford, CT 06108 USA

[3] Pratt & Whitney, E Hartford, CT USA

[4] Auburn Univ, Auburn, AL 36849 USA

[5] Air Force Res Lab, AFRL RXCC, Wright Patterson AFB, OH USA

来源：

COMPOSITES PART B-ENGINEERING | 2020年 / 184卷

关键词：

ELASTIC PROPERTIES; STRESS; MODULI; INCLUSIONS; STRENGTH; MODEL;

D O I：

10.1016/j.compositesb.2019.107658

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of porosity on the non-linear stress-strain response and time-dependent strain response under constant stress has been investigated. The material used in the study is a woven composite of CG-Nicalon (TM) fiber and SiNC matrix. The composite has been modeled using a model for spheroidal inclusions in a medium in combination with a micromechanics-based progressive damage and constituent inelasticity model for CMCs. Numerical estimates of deformation and failure are shown to compare favorably with experimental measurements. It has also been shown that porosity affects through-thickness properties more as compared to the in-plane properties and that creep rupture strength is significantly degraded by increased porosity in the material.

引用

页数：12

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