A micromechanistic-based approach to fatigue life modeling of titanium-matrix composites

被引：12

作者：

Foringer, MA ^{[1
]}

Robertson, DD ^{[1
]}

Mall, S ^{[1
]}

机构：

[1] USAF,INST TECHNOL,DEPT AERONAUT & ASTRONAUT,WRIGHT PATTERSON AFB,OH 45433

来源：

COMPOSITES PART B-ENGINEERING | 1997年 / 28卷 / 5-6期

关键词：

metal-matrix composites; fatigue; thermomechanical; damage mechanics;

D O I：

10.1016/S1359-8368(96)00083-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Fatigue life modeling of titanium-based metal-matrix composites (MMCs) was accomplished by combining a unified viscoplastic theory, a non-linear micromechanics analysis and a damage accumulation model. The micromechanics analysis employed the Bodner-Partom unified viscoplastic theory with directional hardening. This analysis was then combined with a life-fraction fatigue model to account for the time-dependent component of fatigue damage. The life-fraction fatigue model involved the linear summation of damage from the fiber and matrix constituents of the composite. A single set of empirical constants for the life-fraction fatigue model were established for each of two titanium MMCs reinforced with silicon carbide fibers: SCS-6/Ti-15-3 and SCS-6/TIMETAL(R)21s. The predicted fatigue lives were within one order cf magnitude of the experimental data for different loading conditions: isothermal fatigue, and both in-phase and out-of-phase thermomechanical fatigue. MMCs modeled included cross-ply, quasi-isotropic and unidirectional SCS-6/TIMETAL(R)21s, and cross-ply and quasi-isotropic SCS-6iTi-15-3 laminates. (C) 1997 Elsevier Science Limited.

引用

页码：507 / 521

页数：15

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