FEA Analysis Predicts Composite Delamination

Popular finite-element structural analysis software has a new add-on capability for predicting composite delamination, fracture, and failure under load.

Popular finite-element structural analysis software has a new add-on capability for predicting composite delamination, fracture, and failure under load. Virtual Crack Closure Technique (VCCT) simulation technology developed by Boeing is available as an integrated part of Abaqus Version 6.5 FEA software from Abaqus, Inc., Providence, R.I. VCCT technology in Abaqus enables engineers to identify the overall load at which a crack initiates and to predict the behavior of the structure as the crack propagates. In the example pictured here, an aircraft skin-stringer panel buckles under a shear force applied along the diagonal. Delamination is shown near the center of the part, between the stringer and the skin. Incidentally, Abaqus was recently acquired by Dassault Systemes of France, which supplies Catia and SolidWorks CAD/CAM/PLM software.