Three-dimensional evaluation of the T-stress in centre cracked plates

1995 ◽  
Vol 70 (1) ◽  
pp. 35-50 ◽  
Author(s):  
B. S. Henry ◽  
A. R. Luxmoore
Keyword(s):  
Three Dimensional ◽  
Cracked Plates ◽  
T Stress

scholarly journals On The Parameters of Geometric Constraints for Cracked Plates under Tension – Three-Dimensional Problems

2017 ◽  
Vol 22 (4) ◽  
pp. 901-919 ◽  
Author(s):  
M. Graba
Keyword(s):  
Fracture Toughness ◽  
Comparative Analysis ◽  
Crack Front ◽  
External Load ◽  
Three Dimensional ◽  
Geometric Constraints ◽  
Numerical Calculations ◽  
Cracked Plates ◽  
The Relationship ◽  
Actual Fracture

Abstract This paper provides a comparative analysis of selected parameters of the geometric constraints for cracked plates subjected to tension. The results of three-dimensional numerical calculations were used to assess the distribution of these parameters around the crack front and their changes along the crack front. The study also involved considering the influence of the external load on the averaged values of the parameters of the geometric constraints as well as the relationship between the material constants and the level of the geometric constraints contributing to the actual fracture toughness for certain geometries.

Analysis of Three-Dimensional Clamped Single Edge Notched Tension (SENT) Specimens

2018 ◽  
Author(s):  
Zheng Liu ◽  
Xu Chen ◽  
Xin Wang
Keyword(s):  
Stress Intensity Factor ◽  
Stress Intensity ◽  
Intensity Factor ◽  
Crack Depth ◽  
Plate Thickness ◽  
Three Dimensional ◽  
Width Ratio ◽  
Element Analysis ◽  
Out Of Plane ◽  
T Stress

In the present paper, three-dimensional clamped SENT specimens, which is one of the most widely used low-constraint and less-conservative specimen, are analyzed by using a crack compliance analysis approach and extensive finite element analysis. Considering the test standard (BS8571) recommended specimen sizes, the daylight to width ratio, H/W, is 10.0, the relative crack depth, a/W, is varied by 0.2, 0.3, 0.4, 0.5 or 0.6 and the relative plate thickness, B/W, is chosen by 1.0, 2.0 or 4.0, respectively. Complete solutions of fracture mechanics parameters, including stress intensity factor (K), in-plane T-stress (T11) and out-of-plane T-stress (T33) are calculated, and the results obtained from above two methods have a good agreement. Moreover, the combination of the effects of a/W and B/W on the stress intensity factor K, T11 and T33 stress are thus illustrated.

COMPENDIUM OF T-STRESS SOLUTIONS FOR TWO AND THREE DIMENSIONAL CRACKED GEOMETRIES

1995 ◽  
Vol 18 (1) ◽  
pp. 141-155 ◽  
Author(s):  
A. H. Sherry ◽  
C. C. France ◽  
M. R. Goldthorpe
Keyword(s):  
Three Dimensional ◽  
T Stress

Three-dimensional analysis of bimaterial cracked plates

1989 ◽  
Vol 40 (4) ◽  
pp. R85-R90 ◽  
Author(s):  
R. S. Alwar ◽  
S. R. Mettu
Keyword(s):  
Dimensional Analysis ◽  
Three Dimensional ◽  
Cracked Plates

Three-Dimensional Computational Analysis of Stress State Transition in Through-Cracked Plates

2016 ◽  
Vol 10 (3) ◽  
pp. 343-352 ◽  
Author(s):  
Rúben Maia ◽  
Ricardo Branco ◽  
F. V. Antunes ◽  
M. C. Oliveira ◽  
Andrei Kotousov
Keyword(s):  
Stress State ◽  
Computational Analysis ◽  
State Transition ◽  
Three Dimensional ◽  
Cracked Plates

scholarly journals Three-Dimensional Free Vibration Analyses of Preloaded Cracked Plates of Functionally Graded Materials via the MLS-Ritz Method

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7712
Author(s):  
Chiung-Shiann Huang ◽  
Hao-Ting Lee ◽  
Pin-Yu Li ◽  
Ming-Ju Chang
Keyword(s):  
Ritz Method ◽  
Three Dimensional ◽  
Stress Singularity ◽  
Functionally Graded ◽  
Vibration Frequencies ◽  
Graded Materials ◽  
Plate Convergence ◽  
Cracked Plates ◽  
Graded Material ◽  
Admissible Functions

In this study, the moving least squares (MLS)-Ritz method, which involves combining the Ritz method with admissible functions established using the MLS approach, was used to predict the vibration frequencies of cracked functionally graded material (FGM) plates under static loading on the basis of the three-dimensional elasticity theory. Sets of crack functions are proposed to enrich a set of polynomial functions for constructing admissible functions that represent displacement and slope discontinuities across a crack and appropriate stress singularity behaviors near a crack front. These crack functions enhance the Ritz method in terms of its ability to identify a crack in a plate. Convergence studies of frequencies and comparisons with published results were conducted to demonstrate the correctness and accuracy of the proposed solutions. The proposed approach was also employed for accurately determining the frequencies of cantilevered and simply supported side-cracked rectangular FGM plates and cantilevered internally cracked skewed rhombic FGM plates under uniaxial normal traction. Moreover, the effects of the volume fractions of the FGM constituents, crack configurations, and traction magnitudes on the vibration frequencies of cracked FGM plates were investigated.

Study on cracked plates, shells and three dimensional bodies

1987 ◽  
Vol 28 (5-6) ◽  
pp. 741-760 ◽  
Author(s):  
Liu Chuntu ◽  
Li Yingzhi
Keyword(s):  
Three Dimensional ◽  
Cracked Plates

Experiments Method Design Applied to Optimization of Patch Repairs for Cracked Plates

2013 ◽  
Vol 577-578 ◽  
pp. 441-444
Author(s):  
M. Belhouari ◽  
S.M. Fekih ◽  
K. Madani ◽  
A. Amiri ◽  
Bel Abbès Bachir Bouiadjra
Keyword(s):  
Design Method ◽  
Three Dimensional ◽  
Aircraft Structures ◽  
Patch Shape ◽  
Cracked Plates ◽  
Repair Efficiency ◽  
Experimental Design Method ◽  
Bonded Composite ◽  
Patch Repairs ◽  
Integral Variation

The optimization of the patch shape of bonded composite repair in aircraft structures is an efficient way to improve the repair performance. In this study the three-dimensional nonlinear finite element method is used to determine the J integral variation along the front of repaired crack with bonded composite patch in aircraft structures. The experimental design method was applied to optimize the patch shape and size in order to determine the most influencing dimension on the repair efficiency.

Three-Dimensional T-Stress to Predict the Directional Stability of Crack Propagation in a Pipeline with External Surface Crack

2012 ◽  
Vol 498 ◽  
pp. 31-41 ◽  
Author(s):  
H. Moustabchir ◽  
Z. Azari ◽  
S. Hariri ◽  
I. Dmytrakh
Keyword(s):  
Stress Intensity Factor ◽  
Stress Intensity ◽  
Intensity Factor ◽  
Numerical Solutions ◽  
Three Dimensional ◽  
Experimental Results ◽  
Strain Gauges ◽  
Geometrical Parameters ◽  
Integrity Assessment ◽  
T Stress

In industrial structures, the presence of cracks under critical loads leads to complete ruin. Fracture rupture mechanics allowed studying macroscopic defect harmfulness. This requires the knowledge of the stresses fields and the deformations near of the crack. Our work is an application of fracture mechanics into the domain of the pressurised structures with defects in the presence of the T-stress parameter. Design of this type of structures is subjected to standards, codes and regulations driven by the potential risk which they represent. The knowledge of the limit pressures in these structures allows appreciating the safety domain of. We present numerical solutions by the commercial code CASTEM2000 in three dimensional 3D and experimental results for the stress intensity factor SIF and the transverse stress noted T-stress, distribution at defect-tip in a Pipeline. The elastic structure modelling will be treated by the finites elements simulation. We study the influence of the geometrical parameters for surface notches and the measures of strains near defects in the studied model have been made by strain gauges. On the basis of the detailed 3D elastic FE analysis results, solutions presented are believed to be the most accurate, and thus provide valuable information for structural integrity assessment considering a notch-tip constraint. The experimental results validate allow numerical simulation. Keywords: Crack, Pressure, T-stress, Stress Intensity factor, Finite element simulation, Strain gauges,

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