| Abstract [eng] |
The purpose of this work is to develop an advanced ultrasound method for aircraft main landing gear tie-bolt inspection. To carry out the research it is necessary to perform further tasks: review information sources on currently used NDT methods, create computerized main landing gear tie-bolt model, test the theoretical model using CIVA NDT software, develop a more advanced ultrasound method and determine a more reliable method. Main landing gear wheel halves are connected with tie-bolts, where on ATR42 aircraft, there are 10 bolts per wheel installed. Each bolt is tested with dye penetrant, magnetic particle, eddy current or ultrasound NDT methods every wheel overhaul cycle. One of the problems with currently used inspection methods is the increased tie-bolt failure rate in service. Theoretical possibilities to inspect tie-bolt with matrix phased array method was performed and compared to currently used ultrasound immersion pulse-echo method, it was determined that matrix phased array is a more suitable choice for the inspection of defects. Theoretical analysis was performed and results obtained. |
