Crack Mouth Opening Displacement-Based η Factors for SE(B) Specimens

被引：0
|
作者：
Petti, J. P. [1 ]
Dodds, R. H., Jr. [2 ]
Link, R. E. [3 ]
机构：
[1] Sandia Natl Labs, Albuquerque, NM 87185 USA
[2] Univ Illinois, Urbana, IL 61801 USA
[3] USN Acad, Annapolis, MD 21402 USA
来源：
JOURNAL OF TESTING AND EVALUATION | 2009年 / 37卷 / 04期
关键词：
elastic-plastic fracture toughness; J-R curve; eta factor; fracture toughness testing; ESTIMATION EQUATIONS; CMOD;
D O I：
10.1520/jte102116
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Three-dimensional finite element analysis of SE(B) fracture toughness specimens with crack sizes ranging from a/W=0.1-0.6 were performed to develop eta(CMOD) values for estimating J(pl) in fracture toughness tests. The analyses included specimens with smooth sides and 20% sidegrooves. The results for eta(CMOD) were 4-9% lower than previously published results based on two-dimensional plane strain analysis. A simple linear expression for eta(CMOD)(a/W) was proposed for introduction into ASTM E 1820 for calculating J(pl) in SE(B) specimens with 0.05 <= a/W <= 0.7.
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页码：383 / 386
页数：4
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