An Edge Crack Torsion Method for Mode III Delamination Fracture Testing

1993 ◽  
Vol 15 (3) ◽  
pp. 193 ◽  
Author(s):  
WS Johnson ◽  
JE Masters ◽  
TK O'Brien ◽  
SM Lee
Keyword(s):  
Edge Crack ◽  
Mode Iii ◽  
Fracture Testing ◽  
Delamination Fracture

Modification of the edge crack torsion specimen for mode III delamination testing. Part II – experimental study

2011 ◽  
Vol 45 (25) ◽  
pp. 2633-2640 ◽  
Author(s):  
Grant Browning ◽  
Leif A. Carlsson ◽  
James G. Ratcliffe
Keyword(s):  
Experimental Study ◽  
Experimental Test ◽  
Edge Crack ◽  
Experimental Studies ◽  
Test Results ◽  
Mode Iii ◽  
Test Fixture ◽  
Fracture Testing ◽  
Delamination Toughness ◽  
Nonuniform Loading

Experimental studies of carbon/epoxy edge crack torsion specimen have been conducted using a specially designed twist test fixture. Of particular concern was verification of the recommendations expressed in the analytical part of this study (Part 1), where it was suggested that overhang (sections of specimen laying outside of the loading and support pins) in the x- and y-directions should be minimized, and fracture testing at longer delamination lengths should be avoided. The experimental test results verified that the specimens with the smallest overhang produced the most consistent delamination toughness data, GIIIc. Specimens with large overhangs exhibited high apparent GIIIc values at long delamination lengths. This was most likely due to nonuniform loading and associated nonuniform delamination extension.

scholarly journals Mode III interlaminar fracture of carbon/epoxy laminates using the edge crack torsion (ECT) test

2009 ◽  
Vol 69 (5) ◽  
pp. 670-676 ◽  
Author(s):  
A.B. de Morais ◽  
A.B. Pereira ◽  
M.F.S.F. de Moura ◽  
A.G. Magalhães
Keyword(s):  
Edge Crack ◽  
Mode Iii ◽  
Interlaminar Fracture
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