scholarly journals Synthesis of crack initiation life in steel notched specimens under torsional fatigue based on the averaged strain energy density

2016 ◽  
Vol 2 ◽  
pp. 1853-1860 ◽  
Author(s):  
Filippo Berto ◽  
Alberto Campagnolo ◽  
Giovanni Meneghetti ◽  
Keisuke Tanaka
Keyword(s):  
Energy Density ◽  
Crack Initiation ◽  
Strain Energy Density ◽  
Strain Energy ◽  
Notched Specimens ◽  
Torsional Fatigue ◽  
Crack Initiation Life

Application of the Strain Energy Density Criterion to the Estimation of Fracture Loads in Structural Steel S355J2 at Lower Shelf Temperatures

2017 ◽  
Author(s):  
Sergio Cicero ◽  
Francisco Ibáñez ◽  
Isabela Procopio ◽  
Virginia Madrazo
Keyword(s):  
Energy Density ◽  
Structural Steel ◽  
Strain Energy Density ◽  
Strain Energy ◽  
Input Parameter ◽  
Fracture Load ◽  
Notched Specimens ◽  
Fracture Tests ◽  
Material Fracture ◽  
Cracked Specimens

This paper presents the application of the Strain Energy Density (SED) criterion to the estimation of fracture loads on structural steel S355J2 operating at lower shelf temperatures (−196°C) and containing U-shaped notches. 24 fracture tests were performed on this material, combining 6 different notch radii: 0 mm (crack-like defect), 0.15 mm, 0.25 mm, 0.50 mm, 1.0 mm and 2.0 mm. The results obtained in cracked specimens (0 mm notch radius) were used to determine the material fracture toughness, which is an input parameter in the SED criterion, whereas the notched specimens were used to demonstrate the capacity and the limitations of the SED criterion to provide fracture load estimations in the analyzed conditions.

Case Criterion of Crack Onset in Orthotropic Bi-Material Notches

2011 ◽  
Vol 465 ◽  
pp. 157-160 ◽  
Author(s):  
Tomáš Profant ◽  
Jan Klusák ◽  
Michal Kotoul
Keyword(s):  
Energy Density ◽  
Crack Initiation ◽  
Strain Energy Density ◽  
Strain Energy ◽  
Local Minimum ◽  
Plane Elasticity ◽  
Mean Value ◽  
Density Factor ◽  
The Mean ◽  
Energy Density Factor

A bi-material notch composed of two orthotropic parts is considered. The stresses and displacements are expressed using the Stroh-Eshelby-Lekhnitskii formalism for plane elasticity. The potential direction of crack initiation is determined from the maximum mean value of the tangential stress or the local minimum of the mean value of the generalized strain energy density factor in both materials [1, 2]. The matched asymptotic procedure is introduced to derive the change of potential energy for the debonding crack and the crack initiated in the determined direction [3].

Probabilistic Fatigue Crack Initiation and Propagation Fields Using the Strain Energy Density

2018 ◽  
Vol 50 (4) ◽  
pp. 620-635 ◽  
Author(s):  
J. A. F. O. Correia ◽  
P. J. Huffman ◽  
A. M. P. De Jesus ◽  
G. Lesiuk ◽  
J. M. Castro ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Energy Density ◽  
Crack Initiation ◽  
Strain Energy Density ◽  
Strain Energy ◽  
Fatigue Crack Initiation ◽  
Crack Initiation And Propagation ◽  
Initiation And Propagation
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