Linear Least Square Approach for the Estimation of Crack Tip Fracture Parameters Using Isopachic Data from Thermoelastic Stress Analysis

2019 ◽  
Vol 72 (11) ◽  
pp. 2933-2945
Author(s):  
Naresh Reddy Kolanu ◽  
Swaraj Kumar Tripathy ◽  
Gangadharan Raju ◽  
M Ramji
Keyword(s):  
Stress Analysis ◽  
Crack Tip ◽  
Thermoelastic Stress ◽  
Least Square ◽  
Thermoelastic Stress Analysis ◽  
Fracture Parameters ◽  
Least Square Approach ◽  
Linear Least Square

The Effect of Crack-Tip Interactions on the Curve-Fitting of Isopachics

2004 ◽  
Vol 1-2 ◽  
pp. 121-126 ◽  
Author(s):  
Keith Worden ◽  
Andrew Spencer ◽  
Janice M. Dulieu-Barton
Keyword(s):  
Experimental Data ◽  
Stress Field ◽  
Stress Analysis ◽  
Recent Work ◽  
Curve Fitting ◽  
Crack Tip ◽  
Thermoelastic Stress ◽  
Thermoelastic Stress Analysis ◽  
Fitting Procedure ◽  
Crack Tips

Recent work by the authors has allowed the estimation of crack-tip SIFs by direct curvefitting of a cardioid form to measured isopachics from thermoelastic stress analysis. However, some of the curve-fits indicated that the cardioid form was inappropriate for the base model. One of the possible explanations for this is that the cardioid form is only suitable for an isolated crack-tip stress field. In the experimental data for the previous studies, a crack was placed centrally in a plate and there will therefore have been two (potentially) interacting crack-tips involved. The object of the current paper is to determine numerically, the stress field for such a crack system and to quantify the effect of any interactions on the curve-fitting procedure.

Development and applications of thermoelastic stress analysis

1998 ◽  
Vol 33 (2) ◽  
pp. 93-104 ◽  
Author(s):  
J M Dulieu-Barton ◽  
P Stanley
Keyword(s):  
Composite Materials ◽  
Stress Analysis ◽  
Damage Assessment ◽  
Crack Tip ◽  
Thermoelastic Stress ◽  
Field Work ◽  
Thermoelastic Stress Analysis ◽  
Stress Studies ◽  
Theoretical Developments ◽  
Crack Tip Stress

The theory of thermoelastic stress analysis is reviewed and the implications of some theoretical developments are assessed. Available instrumentation is described and techniques available for separation of individual stress values are summarized. The scope of the technique is illustrated with reference to a number of applications covering crack-tip stress studies, stress analysis and damage assessment in composite materials, and ‘field’ work on a traffic-loaded road bridge.

Thermoelastic Stress Analysis

1982 ◽  
Vol 29 (4) ◽  
pp. 555-563 ◽  
Author(s):  
L.R. Baker ◽  
J.M.B. Webber
Keyword(s):  
Stress Analysis ◽  
Thermoelastic Stress ◽  
Thermoelastic Stress Analysis

Thermoelastic stress analysis of a pultruded composite double lap joint

1999 ◽  
Author(s):  
John H. Hemann ◽  
Richard E. Martin ◽  
Davor G. Mandic
Keyword(s):  
Stress Analysis ◽  
Thermoelastic Stress ◽  
Thermoelastic Stress Analysis ◽  
Lap Joint

Femoral implants comparison by means of thermoelastic stress analysis

2006 ◽  
Vol 39 ◽  
pp. S515-S516
Author(s):  
E.M. Zanetti ◽  
S.S. Musso ◽  
A.L. Audenino
Keyword(s):  
Stress Analysis ◽  
Thermoelastic Stress ◽  
Thermoelastic Stress Analysis ◽  
Femoral Implants
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