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Effect of tow-drop gaps on the damage resistance and tolerance of Variable-Stiffness Panels

This paper presents an experimental study of the effects of tow-drop gaps in Variable Stiffness Panels under drop-weight impact events. Two different configurations, with and without ply-staggering, have been manufactured by Automated Fibre Placement and compared with their baseline counterpart without defects. For the study of damage resistance, three levels of low velocity impact energy are generated with a drop-weight tower. The damage area is analysed by means of ultrasonic inspection. Results of the analysed defect configurations indicate that the influence of gap defects is only relevant under small impact energy values. However, in the case of damage tolerance, the residual compressive strength after impact does not present significant differences to that of conventional straight fibre laminates. This indicates that the strength reduction is driven mainly by the damage caused by the impact event rather than by the influence of manufacturing-induced defects

Elsevier

Autor: Falcó Salcines, Olben
Lopes, Cláudio Saúl
Mayugo Majó, Joan Andreu
Gascons i Clarió, Narcís
Renart Canalias, Jordi
Resum: This paper presents an experimental study of the effects of tow-drop gaps in Variable Stiffness Panels under drop-weight impact events. Two different configurations, with and without ply-staggering, have been manufactured by Automated Fibre Placement and compared with their baseline counterpart without defects. For the study of damage resistance, three levels of low velocity impact energy are generated with a drop-weight tower. The damage area is analysed by means of ultrasonic inspection. Results of the analysed defect configurations indicate that the influence of gap defects is only relevant under small impact energy values. However, in the case of damage tolerance, the residual compressive strength after impact does not present significant differences to that of conventional straight fibre laminates. This indicates that the strength reduction is driven mainly by the damage caused by the impact event rather than by the influence of manufacturing-induced defects
Accés al document: http://hdl.handle.net/2072/295417
Llenguatge: eng
Editor: Elsevier
Drets: Tots els drets reservats
Matèria: Materials compostos
Composite materials
Polímers
Polymers
Fibres
Fibers
Resistència de materials
Strength of materials
Títol: Effect of tow-drop gaps on the damage resistance and tolerance of Variable-Stiffness Panels
Tipus: info:eu-repo/semantics/article
Repositori: Recercat

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