Selective activation of intrinsic cohesive elements for fracture analysis of laminated composites

2019 ◽  
Vol 210 ◽  
pp. 310-320
Author(s):  
Kyeongsik Woo ◽  
Douglas S. Cairns
Keyword(s):  
Laminated Composites ◽  
Fracture Analysis ◽  
Cohesive Elements ◽  
Selective Activation

scholarly journals Selective Activation of Intrinsic Cohesive Elements

2014 ◽  
Vol 02 (12) ◽  
pp. 1061-1068 ◽  
Author(s):  
Kyeongsik Woo ◽  
William M. Peterson ◽  
Douglas S. Cairns
Keyword(s):  
Cohesive Elements ◽  
Selective Activation

Residual strength of laminated composites after impact

2010 ◽  
Vol 45 (9) ◽  
pp. 1031-1043 ◽  
Author(s):  
V. Kamala Kannan ◽  
A. Rajadurai ◽  
B. Nageswara Rao
Keyword(s):  
Residual Strength ◽  
Laminated Composites ◽  
Empirical Relation ◽  
Laminated Composite ◽  
Fracture Analysis ◽  
Static Strength ◽  
Impact Loads ◽  
Strength Assessment ◽  
The Impact ◽  
Made In

This article deals with the residual strength assessment on completely as well as partially penetrated laminated composites due to impact loads by idealizing the damage locations as holes and cracks. Modifications are made in the inherent flaw model (IFM) of Waddoups, Eisenman, and Kaminski (known as the WEK model) to correlate the fracture data of laminated composites. For velocities above complete penetration, the residual strength is identical to the static strength of the laminated composite with a hole having the same diameter as the impacting particle. For this case, the inherent flaw length ahead of the notch is correlated with notched and un-notched strengths through fracture parameters. For the case where the impact velocities are less than the penetration velocity, an empirical relation is proposed following the IFM for the residual strength in terms of kinetic energy of the impact. The adequacy of the modified IFM is demonstrated through comparison of fracture analysis results with tensile, compressive, and impact fracture strength of laminated composites containing holes and cracks.

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