Investigation of Effect of Hole on Rib-web of Aircraft Wing

Aircraft wing Ribs are attached with Forward and Aft spar and connected to skin through shear ties and stringer clips. Aircraft wing Rib webs are designed for shear resistant and Intermediate Diagonal Tension. Generally wing ribs have lightening holes and holes for fuel systems, tubes, etc., This paper investigates the shear buckling of wing rib web panel with and without hole subjected to shear loads. The stability of the web panel will reduce by having the holes. In order to increase shear buckling strength of a web panel with hole, a reinforcement to be given around the hole. The detailed analysis of panel with reinforced hole is presented in this paper. Shear buckling strength is compared for the following cases, i. Web without hole, ii. Web with hole and iii. Web with reinforced hole. The analysis is carried out in ANSYS Workbench for the wing rib web without, with hole and with hole reinforcement