Ebook: Notch Effects in Fatigue and Fracture

As Directors of this NATO Workshop, we welcome this opportunity to record formally our thanks to the NATO Scientific Affairs Division for making our meeting possible through generous financial support and encouragement. This meeting has two purposes: the first obvious one because we have collected scientists from East, far East and west to discuss new development in the field of fracture mechanics: the notch fracture mechanics. The second is less obvious but perhaps in longer term more important that is the building of bridges between scientists in the frame of a network called Without Walls Institute on Notch Effects in Fatigue and Fracture". Physical perception of notch effects is not so easy to understand as the presence of a geometrical discontinuity as a worst effect than the simple reduction of cross section. Notch effects in fatigue and fracture is characterised by the following fundamental fact: it is not the maximum local stress or stress which governs the phenomena of fatigue and fracture. The physic shows that a process volume is needed probably to store the necessary energy for starting and propagating the phenomenon. This is a rupture of the traditional "strength of material" school which always give the prior importance of the local maximum stress. This concept of process volume was strongly affirmed during this workshop.

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The particular emphasis of this book is on new approaches to the notch effect problem in fatigue and fracture, and in particular the volumetric approach. These new methods are introduced in an attempt to replace the hot spot method, which suffers from some degree of empiricism. The work has given rise to a new field: notch fracture mechanics, in which a crack is considered as a particular case of a notch. Theoretical and practical aspects are presented in both fracture and fatigue. Special attention is paid to welded joints.
Readership: Particularly recommended to engineers involved in safety design. Readers should possess adequate skill in strength of materials and fracture mechanics.

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The particular emphasis of this book is on new approaches to the notch effect problem in fatigue and fracture, and in particular the volumetric approach. These new methods are introduced in an attempt to replace the hot spot method, which suffers from some degree of empiricism. The work has given rise to a new field: notch fracture mechanics, in which a crack is considered as a particular case of a notch. Theoretical and practical aspects are presented in both fracture and fatigue. Special attention is paid to welded joints.
Readership: Particularly recommended to engineers involved in safety design. Readers should possess adequate skill in strength of materials and fracture mechanics.
Content:
Front Matter....Pages i-xii
Notch Effects in Fatigue and Fracture....Pages 1-22
Characteristic Distance as a Material’s Structure Parameter in the Theory of Fracture Emanating from Notches and Cracks....Pages 23-38
Inclusions Effect on the Notch Behaviour of a Low-Alloy Tempered Steel....Pages 39-49
Local Fracture Criterion for Notched Structures....Pages 51-57
Notch Effects on the Fracture Behaviour of Orthotropic Materials....Pages 59-71
Experimental Results on Temperature, Strain Rate and Size Effects in Steel of Reactor Pressure Vessel....Pages 73-93
The Notch and Size Effect in Brittle-Ductile Transition Behaviour of Materials....Pages 95-116
Mixed Mode Fracture for Notched Structures....Pages 117-126
Local Characteristics of (Brittle) Failure Assessed from Charpy Type Specimen....Pages 127-146
Probabilistic Local Approach Based on Notched Tensile Specimen Data....Pages 147-159
Analysis of the Evolution of the Charpy Impact Test Through the Notch Fracture Mechanics....Pages 161-185
The Critical Volume Method in Fatigue Analysis....Pages 187-205
Notch Effect in High Cycle Fatigue....Pages 207-220
Loading Mode and Notch Effect in High Cycle Fatigue....Pages 221-237
Probabilistic Description of Fatigue Crack Growth in a Titanium Alloy Notched Member....Pages 239-255
Experimental Analysis of Crack Growth in a Notched Specimen Made of Ni3Al Intermetallic Alloy....Pages 257-269
Numerical Simulation of Fatigue Crack Growth for Corner Cracks Emanating from Fastener Holes....Pages 271-287
A Numerical Analysis of the Fatigue Life of Electron Beam Welds in an Aircraft Hydraulic Pump....Pages 289-305
Fatigue Strength of Welded Joints by the Local Strain Method....Pages 307-316
Growth Rates and Closure Development of Short Fatigue Cracks at Notches and at Weld Toes....Pages 317-330
On Corrosion Fatigue Initiation from Notches and the Local Corrosion Fracture Approaches....Pages 331-346
Notch Effect in Welded Joints Submitted to Fatigue....Pages 347-361

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The particular emphasis of this book is on new approaches to the notch effect problem in fatigue and fracture, and in particular the volumetric approach. These new methods are introduced in an attempt to replace the hot spot method, which suffers from some degree of empiricism. The work has given rise to a new field: notch fracture mechanics, in which a crack is considered as a particular case of a notch. Theoretical and practical aspects are presented in both fracture and fatigue. Special attention is paid to welded joints.
Readership: Particularly recommended to engineers involved in safety design. Readers should possess adequate skill in strength of materials and fracture mechanics.
Content:
Front Matter....Pages i-xii
Notch Effects in Fatigue and Fracture....Pages 1-22
Characteristic Distance as a Material’s Structure Parameter in the Theory of Fracture Emanating from Notches and Cracks....Pages 23-38
Inclusions Effect on the Notch Behaviour of a Low-Alloy Tempered Steel....Pages 39-49
Local Fracture Criterion for Notched Structures....Pages 51-57
Notch Effects on the Fracture Behaviour of Orthotropic Materials....Pages 59-71
Experimental Results on Temperature, Strain Rate and Size Effects in Steel of Reactor Pressure Vessel....Pages 73-93
The Notch and Size Effect in Brittle-Ductile Transition Behaviour of Materials....Pages 95-116
Mixed Mode Fracture for Notched Structures....Pages 117-126
Local Characteristics of (Brittle) Failure Assessed from Charpy Type Specimen....Pages 127-146
Probabilistic Local Approach Based on Notched Tensile Specimen Data....Pages 147-159
Analysis of the Evolution of the Charpy Impact Test Through the Notch Fracture Mechanics....Pages 161-185
The Critical Volume Method in Fatigue Analysis....Pages 187-205
Notch Effect in High Cycle Fatigue....Pages 207-220
Loading Mode and Notch Effect in High Cycle Fatigue....Pages 221-237
Probabilistic Description of Fatigue Crack Growth in a Titanium Alloy Notched Member....Pages 239-255
Experimental Analysis of Crack Growth in a Notched Specimen Made of Ni3Al Intermetallic Alloy....Pages 257-269
Numerical Simulation of Fatigue Crack Growth for Corner Cracks Emanating from Fastener Holes....Pages 271-287
A Numerical Analysis of the Fatigue Life of Electron Beam Welds in an Aircraft Hydraulic Pump....Pages 289-305
Fatigue Strength of Welded Joints by the Local Strain Method....Pages 307-316
Growth Rates and Closure Development of Short Fatigue Cracks at Notches and at Weld Toes....Pages 317-330
On Corrosion Fatigue Initiation from Notches and the Local Corrosion Fracture Approaches....Pages 331-346
Notch Effect in Welded Joints Submitted to Fatigue....Pages 347-361
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