Strength Numerical Research For Repaired Structure Of Composite Materials W3T282/F263

Advanced composite materials in aircraft manufacturing technology more widely,especially the wide application of these materials in aircraft airframe,replacement of conventional metal structure,to reduce the structure weight,improve aircraft performance,while improving aircraft service life and fuel economy.But composite materials occur serious internal damage at low speeds impact,leading to a serious decline in the strength of structure,brought great challenges of the civil aircraft maintenance industry.This thesis comes from the research for advanced composite structures repair technology of service aircrafts,use the case of Airbus A320 airplane's elevator upper skin leading edge W3T282/F263 composite laminates,research work focus on:(1)Analysis materials and repairs basic norms of the civil aircrafts composite components in service,based on ANSYS software and establishment of composite component repair finite element simulation model.(2)Using of numerical simulation analysis method,research the strength of the recovery after W3T282/F263 laminate hot bonding Patch repairs,and compared with original manufacturing structure,obtained the results of the stress distribution and strength under uniform load after repair.(3)According to the environmental and technological factors of the civil aircrafts in service affect the strength of the recovery in the actual repair,analysis W3T282/F263 laminate hot bonding Patch repairs performance,optimization of repair,using different forms overlay and different materials the hot bonding Patch repairs,to predict results of stress distribution and intensity of post-repair load.Research focus on the maintenance level and static strength recovery level after civil aircrafts composite materials repair,analyze the local structural stability from static strength,satisfied damage tolerance design requirements of aircraft composite materials.According to the theoretical research results of hot bonding composite repairs,combined with engineering practical work of my company,design structure repair program of composite materials,research for the static strength recovery level after composite repair on the actual condition,analysis repair by model to satisfy the static strength conditions of aircraft composite materials,reduce number of replacement parts and maintenance costs in practice.