DUGi

Modelling and simulation of tow-drop effects arising from the manufacturing of steered-fibre composites

http://dugi.udg.edu/item/http:@@@@hdl.handle.net@@10256@@14114

The introduction of Variable-Stiffness Laminates requires not only the use of advanced numerical simulation tools but also better understanding of manufacturing induced effects. These computational tools can give beneficial insight that will lead to an effective reduction of test campaigns as well as to increase design possibilities. This paper presents a virtual testing approach to study the influence of tow-drop effects, generated in the manufacturing of steered-fibre composites, by means of nonlinear finite element analyses within the framework of fracture and damage mechanics. X-ray computed tomography was used to characterise the embedded resin-rich areas. Both the progressive failure mechanisms and the ultimate failure loads can be predicted with high realism when compared with experimental observations. In addition, the differences of the tow-drop effects on plain and notched laminates can also be predicted accurately

The authors acknowledge the financial support of the Ministerio de Economía y Competitividad of Spain under project MAT2009-07918. The first author would also like to thank the Generalitat de Catalunya for the FI pre-doctorate Grant 2010FI_B00658

Elsevier