Aeroelastic analysis of composite blades with matrix cracking and uncertainties

Purpose – This paper aims to focus on the stochastic analysis of composite rotor blades with matrix cracking in forward flight condition. Design/methodology/approach – The effect of matrix cracking and uncertainties are introduced to the aeroelastic analysis through the cross-sectional stiffness properties obtained using thin-walled beam formulation, which is based on a mixed force and a displacement method. Forward flight analysis is carried out using an aeroelastic analysis methodology developed for composite rotor blades based on the finite element method in space and time. The effects of matrix cracking are introduced through the changes in the extension, extension-bending and bending matrices of composites, whereas the effect of uncertainties are introduced through the stochastic properties obtained from previous experimental and analytical studies. Findings – The stochastic behavior of helicopter hub loads, blade root forces and blade tip responses are obtained for different crack densities. Further...

[1]  Prashant M. Pawar,et al.  On the behavior of thin walled composite beams with stochastic properties under matrix cracking damage , 2011 .

[2]  Ranjan Ganguli,et al.  Modeling progressive damage accumulation in thin walled composite beams for rotor blade applications , 2006 .

[3]  B.S.N. Murthy,et al.  Damage detection in vibrating bodies using genetic algorithms , 2004 .

[4]  Ranjan Ganguli,et al.  Fuzzy-Logic-Based Health Monitoring and Residual-Life Prediction for Composite Helicopter Rotor , 2007 .

[5]  Ramesh Talreja,et al.  Evolution of ply cracks in multidirectional composite laminates , 2010 .

[6]  Ranjan Ganguli,et al.  Aeroelastic Response of Composite Helicopter Rotor with Random Material Properties , 2008 .

[7]  Inderjit Chopra,et al.  Detection of Helicopter Rotor System Simulated Faults Using Neural Networks , 1996 .

[8]  Jiecai Han,et al.  Transverse cracking of orthotropic composite laminates: a fracture mechanics approach , 2010 .

[9]  Ranjan Ganguli,et al.  Matrix Crack Detection in Thin-walled Composite Beam using Genetic Fuzzy System , 2005 .

[10]  Darryll J. Pines,et al.  Damage Identification of Chordwise Crack Size and Location in Uncoupled Composite Rotorcraft Flexbeams , 1998 .

[11]  W. P. De Wilde,et al.  The use of Monte Carlo techniques in statistical finite element methods for the determination of the structural behaviour of composite materials structural components , 1995 .

[12]  Jonathan E. Cooper,et al.  Modeling composite wing aeroelastic behavior with uncertain damage severity and material properties , 2012 .

[13]  Ranjan Ganguli,et al.  Genetic fuzzy system for online structural health monitoring of composite helicopter rotor blades , 2007 .

[14]  Inderjit Chopra,et al.  Refined Structural Dynamics Model for Composite Rotor Blades , 2001 .

[15]  Ranjan Ganguli,et al.  Helicopter rotor blade frequency evolution with damage growth and signal processing , 2005 .

[16]  Omri Rand,et al.  Helicopter Health Monitoring Using an Adaptive Estimator , 2003 .

[17]  M. B. Whiteside,et al.  Stochastic failure modelling of unidirectional composite ply failure , 2012, Reliab. Eng. Syst. Saf..

[18]  Carlos Alberto Conceição António,et al.  From local to global importance measures of uncertainty propagation in composite structures , 2008 .

[19]  Edward C. Smith,et al.  Vibration and flutter of stiff-inplane elastically tailored composite rotor blades , 1993 .

[20]  Ranjan Ganguli,et al.  On the effect of progressive damage on composite helicopter rotor system behavior , 2007 .

[21]  P. Pawar,et al.  Support Vector Machine based Online Composite Helicopter Rotor Blade Damage Detection System , 2008 .

[22]  Sankaran Mahadevan,et al.  Uncertainty quantification and model validation of fatigue crack growth prediction , 2011 .

[23]  Paul L. Rosin,et al.  Neural fuzzy analysis of delaminated composites from shearography imaging , 2001 .

[24]  E. Barbero,et al.  A discrete constitutive model for transverse and shear damage of symmetric laminates with arbitrary stacking sequence , 2011 .

[25]  Ranjan Ganguli,et al.  On the effect of matrix cracks in composite helicopter rotor blade , 2005 .

[26]  Ever J. Barbero,et al.  A robust three-node shell element for laminated composites with matrix damage , 2011 .

[27]  Wael G. Abdelrahman,et al.  Stochastic finite element analysis of the free vibration of laminated composite plates , 2007 .

[28]  C. Upadhyay,et al.  Micromechanics based ply level material degradation model for unidirectional composites , 2012 .

[29]  Ranjan Ganguli,et al.  Modeling Multi-Layer Matrix Cracking in Thin Walled Composite Rotor Blades , 2005 .

[30]  Ranjan Ganguli,et al.  Structural damage detection in a helicopter rotor blade using radial basis function neural networks , 2003 .

[31]  Prashant M. Pawar,et al.  Fuzzy approach for uncertainty analysis of thin walled composite beams , 2012 .

[32]  Ranjan Ganguli,et al.  Effect of matrix cracking and material uncertainty on composite plates , 2010, Reliab. Eng. Syst. Saf..

[33]  Prashant M. Pawar,et al.  Effect of Uncertainty on Hub Vibration Response of Composite Helicopter Rotor Blades , 2010 .

[34]  Peter Gudmundson,et al.  Thermoelastic properties in combined bending and extension of thin composite laminates with transverse matrix cracks , 1997 .