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Progressive failure analysis of helicopter rotor blade under aeroelastic loading
- Source :
- Aviation, 24(1), Aviation, Vol 24, Iss 1 (2020), Aviation; Vol 24 No 1 (2020); 33-41
- Publication Year :
- 2020
-
Abstract
- Unlike metal structure, composite structures don’t give any clue till the fatal final collapse. The problem is more complicated when applied load on the structure is aeroelastic in nature. Under such loading, composite laminate experiences stresses. The first layer failure happens when stresses in the weakest ply exceed the allowable strength of the laminate. This initial layer-based failure changes overall material characteristics. It is important now to degrade the composite laminate characteristics for the subsequent failure prediction. The constitutive relations are required to be updated by the reduction in stiffness. The rest of the undamaged laminates continue to take the load till the updated strength is reached. In the present work, layer wise progressive failure analysis under aeroelastic loading has been performed by the inclusion of different failure criteria which allow for the identification of the location of the failure. ANSYS APDL environment has been used to model geometry of helicopter rotor. Under the loading conditions, stresses are calculated in the blade. Using stress tensor and failure criteria, failure location and modes have been predicted. It has been found that failure starts at higher speeds and failure starts from the root chord and tend towards the tip chord.
- Subjects :
- Chord (geometry)
Finite element method
Composite number
Aerospace Engineering
020101 civil engineering
02 engineering and technology
Helicopter rotor blade
0201 civil engineering
law.invention
0203 mechanical engineering
law
medicine
Motor vehicles. Aeronautics. Astronautics
business.industry
Cauchy stress tensor
Work (physics)
Mode shape
Stiffness
TL1-4050
Structural engineering
Aeroelasticity
Aeroelastic loading
020303 mechanical engineering & transports
Progressive failure
Helicopter rotor
medicine.symptom
business
Reduction (mathematics)
Geology
Subjects
Details
- Language :
- English
- ISSN :
- 16487788 and 18224180
- Volume :
- 24
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- Aviation
- Accession number :
- edsair.doi.dedup.....b6de3976620f34c6862ec62fb67ed3e5