Verification of Failure Mode Analysis Method for Fiber Reinforced Composite Turbo-Shaft Structure
For continuous fiber reinforced composite turbo-shaft structural failure mode analysis,based on the macro-mechanics and meso-mechanics analysis method of cross-scale,a finite element simulation model with the same size of the shaft structure verification model is established,prediction and experimental verification of the dangerous position and the strain and displace-ment response response of composite shaft have been carried,and the principal stress response was calculated through the transfor-mation of the principal-partial axial stress for the composite laminated plates,the macroscopic stress response calculation results of the dangerous elements in all directions were transformed into the microscopic mechanics RVE model,reflecting the micro-scopic mechanics load condition of the RVE model;a micro-mechanics representative volume element(RVE)model was estab-lished,through programming and simulation,the periodic boundary conditions of model were realized,the damage evolution of composite axial structure was simulated,the stress response of fiber reinforced composites was calculated,then the failure envelope was determined.The failure mode of dangerous position of shaft structure is identified according to the damage evolution process and the failure envelope.The failure mode verification test of composite shaft structure was carried out,different failure modes in the failure process were identified by acoustic emission and scanning electron microscopy techniques.The simulation results were compared with the test results,it verify the validity of the failure mode analysis method.
Metal Matrix CompositesLow Pressure Turbine ShaftFailure Mode Analysis MethodExperimen-tal Validation
NETL
NSTL
万方数据
