scholarly journals A weakest link model for multiple mechanism brittle fracture — Model development and application

2021 ◽  
Vol 147 ◽  
pp. 104224
Author(s):  
Magnus Boåsen ◽  
Carl F.O. Dahlberg ◽  
Pål Efsing ◽  
Jonas Faleskog
Keyword(s):  
Brittle Fracture ◽  
Model Development ◽  
Fracture Model ◽  
Weakest Link ◽  
Multiple Mechanism ◽  
Link Model

A Mathematical Model for Competing Failure Modes in Strain Cycle Fatigue

2006 ◽  
Vol 129 (2) ◽  
pp. 293-303 ◽  
Author(s):  
Gerald T. Cashman
Keyword(s):  
Failure Modes ◽  
High Stress ◽  
Local Strain ◽  
Initiation Site ◽  
Weakest Link ◽  
Strain Relationship ◽  
Powder Metallurgy Alloy ◽  
Link Model ◽  
Cyclic Plastic Strain ◽  
Selection Of

Elevated temperature data for powder metallurgy alloy René 95 generated in vacuum are presented to demonstrate that the life differences observed between surface and internally initiated failures are due to an environmental effect. The transition in behavior from a mode at low stress dominated by internal initiations to a surface dominated mode at high stress is quantitatively described in terms of both a weakest-link model and a local strain relationship. A fatigue failure mechanism is provided that explains that the natural selection of initiation site is based upon the concept that the site displaying the highest local cyclic plastic strain is the location where fatigue initiates.

Reliability of Welded Structures Containing Cracks in Heat-Affected Zones

2000 ◽  
Vol 122 (4) ◽  
pp. 225-232 ◽  
Author(s):  
David B. Lanning ◽  
M.-H. Herman Shen
Keyword(s):  
Fracture Toughness ◽  
Stress Intensity Factor ◽  
Stress Intensity ◽  
Crack Front ◽  
Surface Crack ◽  
Material Properties ◽  
Coarse Grained ◽  
Welded Structures ◽  
Weakest Link ◽  
Link Model

This study investigates the reliability of a plate containing a semi-elliptical surface crack intersecting regions of dissimilar material properties. A weakest-link model is developed to express fracture toughness distributions in terms of effective crack lengths that account for the varying stress intensity factor along the crack front. The model is intended to aid in the development of fracture toughness distributions for cracks encountering local brittle zones (LBZ) in the heat-affected zones (HAZ) of welded joints, where lower-bound fracture toughness values have been measured in the laboratory when a significant portion of the crack front is intersecting the coarse-grained LBZs. An example reliability analysis is presented for a surface crack in a material containing alternating bands of two Weibull-distributed toughnesses. [S0892-7219(00)01203-6]

Quasi-brittle fracture model in peridynamics

2019 ◽  
Vol 2019.32 (0) ◽  
pp. 281
Author(s):  
Michiya Imachi ◽  
Hiroki Takahashi ◽  
Satoyuki Tanaka
Keyword(s):  
Brittle Fracture ◽  
Fracture Model

scholarly journals Study on Brittle Fracture Model for Multiaxial Tensile Stress

2005 ◽  
Vol 54 (2) ◽  
pp. 201-206
Author(s):  
Satoshi HANAWA ◽  
Masahiro ISHIHARA ◽  
Yoshinobu MOTOHASHI
Keyword(s):  
Brittle Fracture ◽  
Tensile Stress ◽  
Fracture Model

Applicability of Fracture Toughness Prediction by Coupled Damage Mechanics Model and Brittle Fracture Model for Ductile

2017 ◽  
Vol 2017 (0) ◽  
pp. OS0617
Author(s):  
Kibinobu HOJO ◽  
Takatoshi HIROTA ◽  
Naoki OGAWA ◽  
Kentarou YOSHIMOTO ◽  
Yasuto NAGOSHI ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Brittle Fracture ◽  
Damage Mechanics ◽  
Fracture Model ◽  
Mechanics Model
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