A two-parameter fracture mechanics model for fatigue crack growth in brittle materials

被引：27

作者：

Kravchenko, Sergii G. ^{[1
]}

Kravchenko, Oleksandr G. ^{[1
]}

Sun, C. T. ^{[1
]}

机构：

[1] Purdue Univ, Sch Aeronaut & Astronaut, W Lafayette, IN 47907 USA

来源：

ENGINEERING FRACTURE MECHANICS | 2014年 / 119卷

关键词：

Fatigue crack growth; Crack growth rate; K-dominance zone; Nonsingular stress field; Two-parameter model; STRESS INTENSITY FACTOR; SPECIMEN GEOMETRY; POLY(METHYL METHACRYLATE); PROPAGATION BEHAVIOR; LOADING FREQUENCY; T-STRESS; CONSTRAINT; TOUGHNESS; CLOSURE; SIZE;

D O I：

10.1016/j.engfracmech.2014.02.018

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Nonstandard samples were used to conduct fatigue experiments on brittle material (PMMA) to study the effect of local state of stress at crack tip on fatigue crack propagation rate (FCPR). Results indicated that FCPR cannot be generally characterized by cyclic stress intensity factor range alone and that a second parameter representing the influence of K-dominance zone size and nonsingular stress field is needed. New phenomenological model based on the two-parameter fracture mechanics is proposed for FCPR prediction. Model allows accurate transferability of laboratory data to life prediction in service situations of defects in engineering components under fatigue conditions. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：132 / 147

页数：16

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