Characterization of the Crack Initiation and Crack Propagation Behavior of Welded Steels by Means of the Replica Technique

2014 ◽  
Vol 51 (8) ◽  
pp. 557-567
Author(s):  
M. Panzenböck ◽  
A. Horn ◽  
G. Posch ◽  
H. Clemens
Keyword(s):  
Crack Initiation ◽  
Crack Propagation ◽  
Replica Technique ◽  
Propagation Behavior ◽  
Crack Propagation Behavior

Study on Compound Type Crack Propagation Behavior of Asphalt Concrete

2006 ◽  
Vol 324-325 ◽  
pp. 759-762 ◽  
Author(s):  
Tao Xie ◽  
Yan Jun Qiu ◽  
Ze Zhong Jiang ◽  
Chang Fa Al
Keyword(s):  
Crack Initiation ◽  
Crack Propagation ◽  
Asphalt Concrete ◽  
Asphalt Pavement ◽  
Traffic Load ◽  
Numerical Code ◽  
Three Point Bending ◽  
Propagation Behavior ◽  
Compound Type ◽  
Crack Propagation Behavior

The furthest dangerous cracking type of asphalt pavement is usually considered of the simplex type crack(namely shear crack) under traffic load, but the so-called type crack should be the compound cracking at the concurrence of I type crack (namely splay crack) and type crack. In order to study the compound type crack propagation behavior of asphalt concrete, a three point bending beam with compound type notched has been designed. Asymmetry-gap small girder specimens of asphalt concrete are adopted in the test, and the central testing equipment is MTS. A series of compound type three point bending beam tests have been performed to simulate compound type crack initiation and growth. The propagation of compound type crack is studied by a newly developed numerical code, Rock Failure Process Analysis (RFPA2D).it is shown that the crack initiation angle and the peak load increased as the distance of the preexisting crack from the midpoint of the beam increased, the crack propagation path follows some regularity in general and the main force of crack propagation is still tensile stress. Through this work, the understanding of the mechanism about damage and early destroy of asphalt pavement can be advanced and it can provide guidance for asphalt pavement design and maintenance.

Characterization of 2-dimensional crack propagation behavior by simulation and analysis

1996 ◽  
Vol 75 (3) ◽  
pp. 247-259 ◽  
Author(s):  
Byung-Nam Kim ◽  
Shuichi Wakayama ◽  
Masanori Kawahara
Keyword(s):  
Crack Propagation ◽  
Propagation Behavior ◽  
Crack Propagation Behavior

Effect of Microstructure on Small Fatigue Crack Initiation and Propagation Behavior of Ti-6Al-4V Alloy

2007 ◽  
Vol 353-358 ◽  
pp. 1215-1218 ◽  
Author(s):  
K. Komano ◽  
Sotomi Ishihara ◽  
A.J. McEvily ◽  
H. Shibata
Keyword(s):  
Crack Initiation ◽  
Crack Propagation ◽  
Fatigue Crack Initiation ◽  
Fatigue Tests ◽  
Linear Elastic ◽  
Propagation Behavior ◽  
Small Fatigue Crack ◽  
Initiation And Propagation ◽  
Crack Propagation Behavior ◽  
Effect Of Microstructure

Fatigue tests were performed in laboratory air using extruded Ti-6Al-4V to determine the effect of microstructure on S-N curve, and the crack initiation and crack propagation behavior of the alloy. A modified linear elastic fracture mechanics approach was used in the analysis of the short crack propagation behavior to predict the S-N curve and the crack propagation curve. The predictions agreed well with the experimental results.

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