INTERMEDIATE FRACTURE STRESS AND FRACTURE INITIATION MODE TRANSITIONS IN THE BRITTLE FRACTURE OF STRUCTURAL STEELS

1978 ◽  
pp. 165-171
Author(s):  
A. Kochendoerfer
Keyword(s):  
Brittle Fracture ◽  
Fracture Stress ◽  
Fracture Initiation ◽  
Structural Steels ◽  
Mode Transitions

scholarly journals The Thin Ice Layer Brittle Fracture Stress Model and de-icing Angle Optimization

2015 ◽  
Vol 121 ◽  
pp. 1296-1303 ◽  
Author(s):  
Chenghu Zhang ◽  
Jiyou Lin ◽  
Pengfei Chen ◽  
Yan Fu
Keyword(s):  
Brittle Fracture ◽  
Fracture Stress ◽  
Stress Model

scholarly journals On the Characteristics of Brittle Fracture Initiation in a Structurally Stress Concentrated Region (2nd Report)

1980 ◽  
Vol 1980 (148) ◽  
pp. 169-176 ◽  
Author(s):  
Kin-ichi Nagai ◽  
Hiroshi Yajima ◽  
Katsuya Kajimoto ◽  
Takahiro Hino ◽  
Nagio Minami
Keyword(s):  
Brittle Fracture ◽  
Fracture Initiation

Investigation of the Microstructure Factors Affecting the Brittle Fracture Initiation of Pre-Cracked Charpy-Type Samples of VVER-1000 RPV Steel

2013 ◽  
Vol 592-593 ◽  
pp. 635-638
Author(s):  
Evgenia A. Kuleshova ◽  
Maxim A. Artamonov ◽  
Artem D. Erak
Keyword(s):  
Brittle Fracture ◽  
Base Metal ◽  
Fracture Initiation ◽  
Type Specimens ◽  
Fracture Origin ◽  
Factors Affecting ◽  
Three Point Bending ◽  
Weld Metals ◽  
Rpv Steel ◽  
Higher Temperature

The correlation between fracture toughness parameter KJc and cleavage initiation distance (CID) for the three point bending (3PB) pre-crecked Charpy type specimens of VVER-1000 reactor pressure vessel base and weld metals was observed. Two types of brittle fracture origin sites were found: nonmetallic inclusions and grain or subgrain boundaries. It was shown that KJc values are shifted to the higher temperature area for weld metal with respect to base metal data. In case when the initiation origin is grain or subgrain boundary, the KJc values are higher for base metal at the same CID values. This indicates the higher crack resistance of base metal.

Stress Concentrations for Filled and Unfilled Closely Spaced Cylindrical Defects

1985 ◽  
Vol 107 (4) ◽  
pp. 271-276 ◽  
Author(s):  
T. Ihara ◽  
M. C. Shaw
Keyword(s):  
Brittle Fracture ◽  
Tensile Stress ◽  
Young’S Modulus ◽  
Fracture Stress ◽  
Brittle Materials ◽  
Critical Value ◽  
Stress Concentrations ◽  
High Quality ◽  
Close Spacing ◽  
The Matrix

All real materials contain defects which significantly reduce the fracture stress of brittle materials. It has been proposed by Griffith [3] that brittle fracture occurs when the maximum intensified tensile stress on the surface of a defect reaches a critical value. It has recently been found [1] that for many brittle materials of high quality, the nature and density of the defects are such that they may be modelled by isolated cylindrical voids. This study considers the stress intensification consequences of the close spacing of cylindrical defects that are filled with a material having a Young’s modulus different than that of the matrix.

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