Fracture Initiation in Metals Under Stress Wave Loading Conditions

2009 ◽  
pp. 301-301-18 ◽  
Author(s):  
LS Costin ◽  
J Duffy ◽  
LB Freund
Keyword(s):  
Stress Wave ◽  
Fracture Initiation ◽  
Loading Conditions ◽  
Wave Loading

FRACTURE INITIATION BY STRESS WAVE LOADING

1985 ◽  
Vol 46 (C5) ◽  
pp. C5-163-C5-169
Author(s):  
J. Duffy ◽  
C. F. Shih ◽  
L. B. Freund ◽  
R. H. Hawley
Keyword(s):  
Stress Wave ◽  
Fracture Initiation ◽  
Wave Loading

scholarly journals Rate-dependent ductile fracture under plane strain tension: experiments and simulations

2018 ◽  
Vol 183 ◽  
pp. 02022
Author(s):  
Vincent Grolleau ◽  
Vincent Lafilé ◽  
Christian C. Roth ◽  
Bertrand Galpin ◽  
Laurent Mahéo ◽  
...  
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Plane Strain ◽  
Static Loading ◽  
High Strain ◽  
Fracture Initiation ◽  
Surface Strain ◽  
Experimental Program ◽  
Loading Conditions ◽  
Plane Strain Tension

Among all other stress states achievable under plane stress conditions, the lowest ductility is consistently observed for plane strain tension. For static loading conditions, V-bending of small sheet coupons is the most reliable way of characterising the strain to fracture for plane strain tension. Different from conventional notched tension specimens, necking is suppressed during V-bending which results in a remarkably constant stress state all the way until fracture initiation. The present DYMAT talk is concerned with the extension of the V-bending technique from low to high strain rate experiments. A new technique is designed with the help of finite element simulations. It makes use of modified Nakazima specimens that are subjected to V-bending. Irrespective of the loading velocity, plane strain tension conditions are maintained throughout the entire loading history up to fracture initiation. Experiments are performed on specimens extracted from aluminum 2024-T3 and dual phase DP450 steel sheets. The experimental program includes quasi static loading conditions which are achieved on a universal testing machine. In addition, high strain rate experiments are performed using a specially-designed drop tower system. In all experiments, images are acquired with two cameras to determine the surface strain history through stereo Digital Image Correlation (DIC). The experimental observations are discussed in detail and also compared with the numerical simulations to validate the proposed experimental technique

The dominance of the K I-field for a crack under stress wave loading

1994 ◽  
Vol 65 (2) ◽  
pp. 161-171
Author(s):  
Y. J. Huang ◽  
D. Gross
Keyword(s):  
Stress Wave ◽  
Wave Loading

Mode-III crack kinking under stress-wave loading

Wave Motion ◽  
1982 ◽  
Vol 4 (2) ◽  
pp. 181-190 ◽  
Author(s):  
J.P. Dempsey ◽  
M.-K. Kuo ◽  
J.D. Achenbach
Keyword(s):  
Stress Wave ◽  
Wave Loading ◽  
Mode Iii ◽  
Crack Kinking ◽  
Mode Iii Crack
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