Characterization of the nonlinear fracture resistance parameters for an aviation GTE turbine disc

2020 ◽  
Vol 43 (8) ◽  
pp. 1686-1702
Author(s):  
Valery Shlyannikov ◽  
Ivan Ishtyryakov ◽  
Andrey Tumanov
Keyword(s):  
Fracture Resistance ◽  
Nonlinear Fracture ◽  
Turbine Disc

Computational assessment of nonlinear fracture resistance parameters for cracked fuselage panel under biaxial loading

2019 ◽  
Vol 104 ◽  
pp. 1174-1187
Author(s):  
V.N. Shlyannikov ◽  
A.V. Tumanov ◽  
A.P. Zakharov
Keyword(s):  
Fracture Resistance ◽  
Biaxial Loading ◽  
Nonlinear Fracture

scholarly journals Generalization of mixed mode crack behavior on the base of nonlinear fracture resistance parameters

2018 ◽  
Vol 13 ◽  
pp. 1117-1122
Author(s):  
V.N. Shlyannikov ◽  
A.P. Zakharov ◽  
A.V. Tumanov ◽  
A.M. Tartygasheva
Keyword(s):  
Fracture Resistance ◽  
Mixed Mode ◽  
Crack Behavior ◽  
Nonlinear Fracture ◽  
Mixed Mode Crack

Subsized Specimens for Fracture Resistance Characterisation Including Transferability Issues

2017 ◽  
Vol 741 ◽  
pp. 110-115
Author(s):  
Ivo Dlouhý ◽  
Luděk Stratil ◽  
Filip Šiška
Keyword(s):  
Fracture Resistance ◽  
Small Punch Test ◽  
Ductile Materials ◽  
Punch Test ◽  
Damage Quantification ◽  
Scaling Models ◽  
Low Constraint ◽  
Basic Approaches ◽  
Shelf Region

The contribution is focused on characterization of methods enabling to apply small/subsized specimens for fracture resistance characterization. The applied methods are divided into transition region and upper shelf region. The approaches used in the upper shelf region represent at the same time methods applicable for ductile materials without transition. Relating to subsized samples two basic approaches are applicable: (i) miniaturized samples based on common standard ones and (ii) specific specimens/methods, e.g. small punch test etc. The results described in the paper belong to the first group. For interpretation of data generated under low constraint conditions toughness scaling models and master curve approached are commented. In ductile region, either the sample used generate valid toughness characteristics, or, if not, there is no way how to correct measured data except damage quantification through micromechanical models.

Comparison of Calculated Crack Growth Values Using Unloading Compliance and d-c EP During SENT Testing

2016 ◽  
Author(s):  
Y. Hioe ◽  
S. Kalyanam ◽  
G. M. Wilkowski
Keyword(s):  
Crack Growth ◽  
Fracture Resistance ◽  
Structural Integrity ◽  
The Arctic ◽  
Test Results ◽  
Weld Defect ◽  
Pros And Cons ◽  
Unloading Compliance ◽  
Exxon Mobil

SENT testing has become increasingly important in the characterization of the base, girth weld, and HAZ structural integrity for pipelines that are operational in the low temperature regions, such as the arctic. While the SENB and CT specimens have been used traditionally in the fracture toughness characterization and assessment of pipeline materials and welds, the SENT specimen is better representative of the constraint behavior of surface cracks found in service. Further, the SENT specimen is closer in representing the ductile-to-brittle transition temperature region for the pipe operation. For strain-based design, ECA, and stress-based fracture analyses of girth weld defects, SENT test results have been found to be more representative of the constraint of a surface crack in a pipe and hence better reflects the material toughness. Typically the CTOD as a function of crack growth is used in girth weld defect analyses, but J-R curves can be calculated at the same time. While several procedures for SENT testing (DNV, Exxon Mobil, CANMET) are currently used in the industry and are based on reliable constitutive behavior, plasticity, and fracture theories and experimental methods, more recently a British Standard (BS8571:2014) has been published. In these procedures, either the d-c EP method or the unloading compliance technique are used to determine the start of ductile tearing and crack growth to arrive at fracture resistance CTOD-R and J-R curves. This paper presents results from comparisons of crack growth predictions where in both techniques were used simultaneously when conducting the SENT tests. Other unique aspects of the comparative methodologies, pros and cons of each of the two methods, guidelines for fracture resistance curve development from SENT testing, and its impact on girth weld, HAZ testing are also discussed.

Fracture Resistance Characterization of Graphite/Epoxy Composites

2009 ◽  
pp. 5-5-13 ◽  
Author(s):  
DH Morris ◽  
HT Hahn
Keyword(s):  
Fracture Resistance ◽  
Epoxy Composites

Fracture Resistance Characterization of Superpave Mixtures Using the Semi-Circular Bending Test

2005 ◽  
Vol 2 (3) ◽  
pp. 12264 ◽  
Author(s):  
Z Wu ◽  
LN Mohammad ◽  
LB Wang ◽  
MA Mull
Keyword(s):  
Fracture Resistance ◽  
Bending Test

scholarly journals Nonlinear fracture resistance parameters for cracked aircraft GTE compressor disk

2018 ◽  
Vol 13 ◽  
pp. 902-907 ◽  
Author(s):  
R.R. Yarullin ◽  
A.P. Zakharov ◽  
I.S. Ishtyriakov
Keyword(s):  
Fracture Resistance ◽  
Nonlinear Fracture ◽  
Compressor Disk
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