TY - JOUR N2 - The quest for airframe weight reduction results in a careful dimensioning cross section areas of structural airframe components depending on the anticipated loading. In the case of flanges of polymeric laminate spars subjected to tension such a dimensioning can be done by means of appropriate ply dropping along the spar flanges. A method for an effective calculation of the number of plies that can be cut off at the cross-section under consideration without excessive stress concentration resulted has been presented. The method takes advantage of the Linear Fracture Mechanics tools combined with simple finite element calculations. In addition, experimental data needed can be easily obtained with the use of inexpensive specimens that are simple for manufacturing and testing. L1 - http://www.czasopisma.pan.pl/Content/115393/PDF/AME_2009_132090.pdf L2 - http://www.czasopisma.pan.pl/Content/115393 PY - 2009 IS - No 1 EP - 103 DO - 10.24425/ame.2009.132090 KW - delamination KW - composite materials KW - spar flanges A1 - Czarnocki, Piotr PB - Polish Academy of Sciences, Committee on Machine Building VL - vol. 56 DA - 2009 T1 - Dimensioning the acceptable ply drop in flanges of composite spars using the Linear Fracture Mechanics apparatus SP - 91 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/115393 T2 - Archive of Mechanical Engineering ER -