Authors
Rafal Anay, Paul Ziehl, Addis Tessema, Roudy Y Wehbe, Lateef Assi, Addis Kidane, Ramy Harik, Brian Tatting, Zafer Gürdal
Journal
AIAA Scitech Forum, (p. 1547). San Diego, California.
Abstract
This paper discusses characterization approaches for the evaluation of potential defects that may occur during the automated fiber placement (AFP) process. Two nondestructive evaluation techniques were utilized simultaneously, acoustic emission (AE) and digital image correlation (DIC), to investigate correlations between mechanical properties and damage propagation during tension tests. The layup configuration is designed with the defect running across the width, and the stacking sequence with seven layers is produced: . A total of 3 panels were manufactured: one containing a gap defect in the middle layer, another one with an overlap defect, and a pristine panel for baseline comparison. Each panel accommodates six coupons having dimensions of 20” x 2”. The results indicate that defects caused during the manufacturing process affect damage initiation and growth.
Citation
Rafal Anay, Paul Ziehl, Addis Tessema, Roudy Wehbe, Lateef Assi, Addis Kidane, Ramy Harik, Brian Tatting and Zafer Gürdal. (January 2019). An Experimental Investigation Concerning the Effects of AFP Defects on Progressive Failure of Tensile Coupons. AIAA Scitech Forum, (p. 1547). San Diego, California. doi:https://doi.org/10.2514/6.2019-1547.