Fracture toughness evaluation of precursor-derived Si–C–N ceramics using the crack opening displacement approach

2009 ◽  
Vol 355 (43-44) ◽  
pp. 2102-2113 ◽  
Author(s):  
Narayanan Janakiraman ◽  
Zaklina Burghard ◽  
Fritz Aldinger
Keyword(s):  
Fracture Toughness ◽  
Crack Opening Displacement ◽  
Crack Opening ◽  
Opening Displacement ◽  
Toughness Evaluation ◽  
Displacement Approach ◽  
Fracture Toughness Evaluation

Fracture mechanics in design and service: ‘living with defects’ - Assessment of defects: the c.o.d. approach

1981 ◽  
Vol 299 (1446) ◽  
pp. 155-167 ◽  
Keyword(s):  
Fracture Toughness ◽  
Fracture Mechanics ◽  
Crack Opening ◽  
Local Stress ◽  
Concentration Effects ◽  
Opening Displacement ◽  
Widespread Application ◽  
Linear Elastic ◽  
Applied Loading ◽  
Displacement Approach

In welded construction particular problems arise with the application of fracture mechanics for the assessment of the effect of defects on structural performance. In many practical cases the use of plane strain linear elastic fracture mechanics methods is invalidated by the actual material thicknesses of interest, by residual stresses or by local stress concentration effects, and by local yielding. The crack opening displacement approach was originally devised as a means of extending linear elastic methods to more widespread application to welded structures. This required the development of a means of assessing fracture toughness, and a means of relating this fracture toughness to the applied loading conditions, and to sizes and types of defects which might be present. The success of this method of assessing defects over a period of some 10-12 years will be illustrated, together with a discussion of the inherent limitations of the approach and possible improvements resulting from recent research into slow tearing and design curve relationships.

Crack opening displacement approach to assess multiaxial low cycle fatigue

2008 ◽  
Vol 30 (3) ◽  
pp. 417-425 ◽  
Author(s):  
Dimitar Tchankov ◽  
Masao Sakane ◽  
Takamoto Itoh ◽  
Naomi Hamada
Keyword(s):  
Crack Opening Displacement ◽  
Low Cycle Fatigue ◽  
Crack Opening ◽  
Cycle Fatigue ◽  
Opening Displacement ◽  
Displacement Approach

scholarly journals Toughness Calculation of Postfire Normal Concrete

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
Qingyang Chen ◽  
Anjing Tang ◽  
Zhoudao Lu
Keyword(s):  
Fracture Toughness ◽  
Critical Load ◽  
Crack Opening Displacement ◽  
Analytical Method ◽  
Crack Opening ◽  
Fracture Model ◽  
Opening Displacement ◽  
Normal Concrete ◽  
Critical Fracture ◽  
Fracture Tests

Fracture tests of postfire normal concrete with ten temperatures up to 600°C are implemented. Residual fracture toughness using analytical method is determined. Two situations are divided at critical load when calculating the cohesive fracture toughness. The initial and critical fracture toughness could be calculated from the complete load-crack opening displacement curves. Finally, the validation of double-Kfracture model to the postfire concrete specimens is proved.

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