Neutron Diffraction Measurement of the Stress Field During Fatigue Cycling of a Cracked Test Specimen

1989 ◽  
Vol 166 ◽  
Author(s):  
M.T. Hutchings ◽  
C.A. Hippsley ◽  
V. Rainey
Keyword(s):  
Fracture Mechanics ◽  
Neutron Diffraction ◽  
Stress Field ◽  
Test Specimen ◽  
Maximum Stress ◽  
Compact Tension ◽  
Compact Tension Specimen ◽  
Diffraction Measurement ◽  
Tension Specimen ◽  
Neutron Diffraction Measurement

ABSTRACTThe triaxial stress field has been measured along the centre line of a compact tension specimen in the direction of cracking. The specimen had been subjected to ∼60,000 cycles at δK=31 and Kmax = 34 MPa mm½ and was bolted open at maximum stress. The field was remeasured after the stress had been fully relaxed. The results are discussed in terms of expectations from fracture mechanics calculations.

Neutron diffraction measurement of the triaxial stress field in a fatigued test specimen

1997 ◽  
Vol 234-236 ◽  
pp. 969-971 ◽  
Author(s):  
M Ceretti ◽  
C.A Hippsley ◽  
M.T Hutchings ◽  
A Lodini ◽  
C.G Windsor
Keyword(s):  
Neutron Diffraction ◽  
Stress Field ◽  
Test Specimen ◽  
Triaxial Stress ◽  
Diffraction Measurement ◽  
Neutron Diffraction Measurement

Measurements of Residual Stress in a Welded Compact Tension Specimen Using the Neutron Diffraction and Slitting Techniques

2010 ◽  
Vol 652 ◽  
pp. 210-215 ◽  
Author(s):  
Foroogh Hosseinzadeh ◽  
P. John Bouchard ◽  
Jonathan A. James
Keyword(s):  
Residual Stress ◽  
Neutron Diffraction ◽  
Significant Contribution ◽  
Creep Crack Growth ◽  
Compact Tension ◽  
Compact Tension Specimen ◽  
Tension Specimen ◽  
Residual Stress Field ◽  
Butt Weld ◽  
Crack Driving Force

The residual stress field in a compact tension specimen blank extracted from a non-stress-relieved thick section butt weld has been measured using neutron diffraction and the slitting method. Significant triaxial residual stresses were found in the specimen that is normally assumed to be stress free. Moreover the level of stress was sufficient to make a significant contribution to the crack driving force in creep crack growth tests. The benefits of using more than one measurement technique in such investigations are demonstrated.

scholarly journals NUMERICAL MODELLING SOFTWARE COMPARISON IN CASE OF LINEAR FRACTURE MECHANICS

2015 ◽  
Vol 2 ◽  
pp. 207
Author(s):  
Inga Vanaga ◽  
Andris Siliņš ◽  
Normunds Jēkabsons
Keyword(s):  
Fracture Mechanics ◽  
Numerical Modelling ◽  
Solid Mechanics ◽  
Linear Models ◽  
Mesh Size ◽  
Compact Tension ◽  
Compact Tension Specimen ◽  
Tension Specimen ◽  
Software Comparison ◽  
Linear Fracture

The paper deals with the accordance's comparison of resources and results of several commercial and solid mechanics numerical modelling software. One of the most common fracture mechanics example is Compact Tension Specimen (CTS) which is used in this paper for testing and comparing the results of commercial solid mechanics numerical modelling software (for instance SolidWorks module CosmosWorks, Unigraphics NX technical analysis module, etc.) using nontrivial examinations to their possibility margins. Standard Griffith (A.A.Griffith) model of energy balance is used in linear models which explores the mesh size influence to the precision of results. Achieved results have been compared mutually and with the examples found in the literature.

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