| Abstrakt: |
The stochastic investigation of fracture response of centrally cracked symmetric angle ply laminated composite plates subjected to different types of biaxially applied stresses by implementing stochastic extended finite element method (SXFEM) is carried out. The second-order perturbation technique is used in the framework of well-established extended finite element method to obtain the mean and coefficient of variance of mixed-mode stress intensity factors by random change in input parameters. The various system properties such as material elastic properties, lamination angle, loading, crack parameters like crack length and crack angle are modelled as independent, and they combine uncorrelated and correlated input random Gaussian variables. Typical numerical results are presented to examine the effect of various levels of uncertainties in biaxial load factors, fibre angle, crack eccentricity in Xand/or Ydirection, crack angles and crack lengths. The results obtained using SXFEM approach are compared with the results available in the published literature, and by performing Monte Carlo simulations, an excellent agreement is seen. |
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