#TITLE_ALTERNATIVE#

• Main Author: WIRAWAN (NIM : 13605003); Tim Pembimbing: Dr. Tatacipta Dirgantara; Dr. Ichsan Setya Putra, NANDA
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/16655
• Institution: Institut Teknologi Bandung

Aircraft accident involved bird strike impact became the important thing. For that reason, Directorate General Civil Aviation (DGCA) had standardized bird impact on aircraft structure which is written in Civil Aviation Safety Regulation (CASR) 25. One of the CASR parts told that fan blade engine structure of airplane must withstand from bird strike impact. To visualize fan blade structure behavior on bird strike impact, this final project will analyze bird strike impact on fan blade using finite element method. On many engineering cases such as bird strike impact on fan blade compressor Pratt and Whitney JT8D, the object which has to be analyzed has complex <br /> <br /> <br /> <br /> <br /> geometry. To reduce reconstruction time, this final project conducted geometrical reconstruction using cross section’s digital imaging use CT-Scan. Object was scanned using CT-Scan with 1150 cross sections. Result of this final project is reaconstuction of fan blade geometry with high accuracy. The difference between fan blade model and real fan blade in geometrical reconstruction is 1.64% with measured fan blade using scales with the smallest scale is 1 gram. There are three bird impact cases which were analyzed. In the first case, bird strike on the tip of the fan blade. In the second case, bird strike in the middle of <br /> <br /> <br /> <br /> <br /> the fan blade, in the third case, bird strike on the root of fan blade. Fan blade was assumed not rotating. Bird was modeled as a hemispherical-ended cylinder weighs 1.82 kg, the bird was also modeled as elastic fluid material. Fan blade was modeled using tetrahedral element with piecewise linear plasticity material. Fan blade root was assumed to be fixed. <br /> <br /> <br /> <br /> <br /> The results of the simulation are, for the highest maximum impact force, stress, and absorbed energy occurred on the case number three. Maximum impact for the tip, middle, and root resulted 142 kN, 235 kN, and 306 kN. Stress for the tip, middle, and root resulted 1707.1 MPa, 2399.6 MPa, dan 3094.7 MPa Absorbed energy for the tip, middle, and root resulted 9.5 kJ, 24.5 kJ, and 40.78 kJ. The benefit resulted in this final project are, we can reconstruct very complex geometry using digital imaging from CT-Scan. Bird strike impact modeling using numerical method can be used side by side with experimental method.