Finite fracture mechanics predictions on the apparent fracture toughness of as-quenched Charpy V-type AISI 4340 steel specimens

2016 ◽  
Vol 40 (6) ◽  
pp. 949-958 ◽  
Author(s):  
A Sapora ◽  
D Firrao
Keyword(s):  
Fracture Toughness ◽  
Fracture Mechanics ◽  
Aisi 4340 Steel ◽  
Apparent Fracture Toughness ◽  
4340 Steel ◽  
Finite Fracture Mechanics ◽  
Type Aisi ◽  
Aisi 4340

Blunt V-Notch Brittle Fracture: An Improved Finite Fracture Mechanics Approach

2015 ◽  
Vol 1105 ◽  
pp. 237-244
Author(s):  
Alberto Sapora ◽  
Pietro Cornetti ◽  
Alberto Carpinteri ◽  
Donato Firrao
Keyword(s):  
Fracture Toughness ◽  
Stress Intensity Factor ◽  
Fracture Mechanics ◽  
Brittle Fracture ◽  
Crack Advance ◽  
Mode I ◽  
Root Radius ◽  
Critical Crack ◽  
Aisi 4340 Steel ◽  
Finite Fracture Mechanics

The coupled Finite Fracture Mechanics (FFM) criterion is applied to investigate brittle fracture in rounded V-notched samples under mode I loading. The approach is based on the contemporaneous fulfilment of a stress requirement and the energy balance, the latter being implemented on the basis of a recently proposed analytical expression for the stress intensity factor. Results are presented in terms of the critical crack advance and the apparent generalized fracture toughness, i.e. the unknowns related to the system of two equations describing the FFM criterion. A validation of the theory is performed by employing varying root radius notched, as-quenched, AISI 4340 steel specimens fracture results.

X-Ray Fractographic Approach to Fracture Toughness of AISI 4340 Steel

1985 ◽  
pp. 289-296 ◽  
Author(s):  
Yukio Hirose ◽  
Zenjiro Yajima ◽  
Keisuke Tanaka
Keyword(s):  
Fracture Toughness ◽  
Aisi 4340 Steel ◽  
X Ray ◽  
4340 Steel ◽  
Aisi 4340
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