Elastic and Plastic Analysis of a Single Edge Cracked Tension Specimen with Clamped Ends

1998 ◽  
Author(s):  
Gerald P. Mercier
Keyword(s):  
Single Edge ◽  
Tension Specimen ◽  
Plastic Analysis

scholarly journals A study on the matching of constraint between steam turbine blade and laboratory specimens

2020 ◽  
Vol 12 (5) ◽  
pp. 168781402092200
Author(s):  
Jie Yang ◽  
Yuman Liu ◽  
Haofeng Chen
Keyword(s):  
Steam Turbine ◽  
Turbine Blade ◽  
Tensile Specimen ◽  
Compact Tension ◽  
Compact Tension Specimen ◽  
Bend Specimen ◽  
Single Edge ◽  
Tension Specimen ◽  
Steam Turbine Blade ◽  
C 50

The matching of constraint between laboratory specimens and actual cracked structures is a key problem of the accurate structure integrity assessment. Different laboratory specimens and the steam turbine blade with different constraints were selected, the matching of constraint between steam turbine blade and laboratory specimens was investigated. The results shown that the steam turbine blade with 2 c = 50 mm, a/2 c = 0.20 has a matching constraint with single edge-notched bend specimen with a/ W = 0.6 and single edge-notched tensile specimen with a/ W = 0.3. The steam turbine blade with 2 c = 50 mm, a/2 c = 0.25 has a matching constraint with single edge-notched bend specimen with a/ W = 0.7. The steam turbine blade with 2 c = 50 mm, a/2 c = 0.30 has a matching constraint with single edge-notched bend specimen with a/ W = 0.5 and single edge-notched tensile specimen with a/ W = 0.1. The steam turbine blade with 2 c = 50 mm, a/2 c = 0.35 has a matching constraint with single edge-notched bend specimen with a/ W = 0.4, compact tension specimen with a/ W = 0.3 and central-cracked tension specimen with a/ W = 0.7. The steam turbine blade with a = 15 mm, a/2 c = 0.30 has a matching constraint with compact tension specimen with a/ W = 0.7 and single edge-notched tensile specimen with a/ W = 0.5. The steam turbine blade with a = 15 mm, a/2 c = 0.40 has a matching constraint with compact tension specimen with a/ W = 0.4. The steam turbine blade with a = 15 mm, a/2 c = 0.50 has a matching constraint with single edge-notched bend specimen with a/ W = 0.5.

A K1 Calibration for a Modified Single Edge Notched Tension Specimen

1990 ◽  
Vol 18 (5) ◽  
pp. 344 ◽  
Author(s):  
A Wolfenden ◽  
MT Kirk ◽  
RJ Sanford
Keyword(s):  
Single Edge ◽  
Tension Specimen

scholarly journals Evaluation of Weld Homogenization Schemes Based on Plastic Loading of Single Edge Notched Tension (SE(T)) Tests

2017 ◽  
Author(s):  
Sameera Naib ◽  
Wim De Waele ◽  
Stijn Hertelé
Keyword(s):  
Base Metal ◽  
Structural Integrity ◽  
Structural Response ◽  
Tensile Tests ◽  
Critical Assessment ◽  
Analysis Procedure ◽  
Single Edge ◽  
Weld Region ◽  
Weld Defect ◽  
Plastic Analysis

Engineering Critical Assessment (ECA) of welds is the process of predicting the structural integrity of a structure in the presence of a weld defect under specified loading conditions. Standardized ECA techniques consider the weld to be equal in properties when compared with base metal or use the concept of ‘strength mismatch’ to distinguish the weld from the base metal. In both cases, the weld region is homogeneous. This is a severe approximation from reality, as welds show complex strength heterogeneity patterns. The authors are concerned with techniques to simplify welds in such way that the structural response of the weld is similar to that of the idealized, homogeneous weld. Two approaches are considered: (a) integrating properties along assumed slip lines originating from the defect tip, and (b) assigning All Weld Metal Tensile Tests (AWMTT) to the entire weld region. A plastic analysis procedure suggested by the ASME BP&V code (‘Twice Elastic Slope method’) is adopted to estimate Plastic Load, whose values are compared for the heterogeneous and equivalent homogeneous welds. Finite Element (FE) simulations were performed for Single Edge notched Tensile (SE(T)) specimens. The results put forward the possibilities of weld homogenization while showing its limitations. This will assist in further improvement of weld ECA.

Constraint analysis of thickness effects on fracture resistance behavior of clamped single-edge notch tension specimen

2020 ◽  
Vol 110 ◽  
pp. 102802
Author(s):  
Baoming Gong ◽  
Congcong Xia ◽  
Giuseppe Lacidogna ◽  
Quanjun Xu ◽  
Yong Liu ◽  
...  
Keyword(s):  
Fracture Resistance ◽  
Single Edge ◽  
Tension Specimen ◽  
Single Edge Notch ◽  
Constraint Analysis ◽  
Edge Notch

scholarly journals Residual Stress State in Single-Edge Notched Tension Specimen Caused by the Local Compression Technique

2016 ◽  
Vol 63 (4) ◽  
pp. 635-645 ◽  
Author(s):  
Yifan Huang ◽  
Wenxing Zhou
Keyword(s):  
Residual Stress ◽  
Crack Opening ◽  
Three Dimensional ◽  
Single Pair ◽  
Finite Element Analyses ◽  
Single Edge ◽  
Tension Specimen ◽  
Compression Technique ◽  
Residual Stress State ◽  
Uncracked Ligament

Abstract Three-dimensional (3D) finite element analyses (FEA) are performed to simulate the local compression (LC) technique on the clamped single-edge notched tension (SE(T)) specimens. The analysis includes three types of indenters, which are single pair of cylinder indenters (SPCI), double pairs of cylinder indenters (DPCI) and single pair of ring indenters (SPRI). The distribution of the residual stress in the crack opening direction in the uncracked ligament of the specimen is evaluated. The outcome of this study can facilitate the use of LC technique on SE(T) specimens.

A model for calculating geometry factors for a mixed-mode I–II single edge notched tension specimen

2011 ◽  
Vol 78 (18) ◽  
pp. 3300-3307 ◽  
Author(s):  
Jafar Albinmousa ◽  
Nesar Merah ◽  
Shafique M.A. Khan
Keyword(s):  
Mixed Mode ◽  
Mode I ◽  
Single Edge ◽  
Tension Specimen

SENT Specimens an Alternative to SENB Specimens for Fracture Mechanics Testing of Pipelines

2003 ◽  
Author(s):  
Ba˚rd Nyhus ◽  
Mario Loria Polanco ◽  
Oddvin O̸rjasæther
Keyword(s):  
Fracture Toughness ◽  
Fracture Mechanics ◽  
Assessment Procedure ◽  
Plastic Collapse ◽  
Single Edge ◽  
Tension Specimen ◽  
Single Edge Notch ◽  
Defect Assessment ◽  
Edge Notch ◽  
Single Edge Notch Bend

During installation operations offshore pipes are often strained beyond yielding. Due to the high loading condition and the high costs of these operations it is important with accurate defect assessment analysis to avoid delays caused by unnecessary repairs or failure because of flaws that should have been detected and repaired. There is therefore a need for an accurate assessment procedure that can be a tool for defect assessment analysis for this application. It is commonly accepted that the fracture toughness is dependent on the geometry constraint at the crack tip. The traditional single edge notch bend (SENB) specimens have a high geometry constraint, and give lower bound fracture toughness for all geometries. For reeling operations these fracture toughness values are often too low to be used in defect assessment of reeling operations. The same is the assumption of plastic collapse when the net section stress is equal to the average between the yield strength and tensile strength. In this paper, the single edge notch tension specimen (SENT) is presented as an alternative fracture mechanics specimen. This specimen has a geometry constraint that is much closer to flaws in pipes than SENB specimens, which will give more realistic fracture properties of the pipe. In the procedure for defect assessments we present, both the fracture toughness and plastic collapse properties are taken from testing of SENT specimens. FE simulations and full scale testing verify the procedure.

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