Reliability Assessment of CFRP Composite Laminate Subjected to Low Velocity Impact Damage

The stochastic behaviors of the carbon fiber reinforced plastic (CFRP) materials are investigated under the low velocity impact to consider the scatters of the material properties to predict the safety and the reliability of the structure. The probabilistic and the deterministic responses of the CFRP materials for different ply orientations are considered to obtain the optimum design for the structures. Composites have numerous applications in modern industries for the low velocity impact to predict the failure behavior of the structure. Failure of composite laminate is catastrophic in nature due to brittle nature of matrix, fiber, uncertainty in volume of constituent material, anisotropic characteristics, and in homogeneity. The stochastic continuum damage model is used for the composite materials to predict the different modes of failure such as fiber, matrix, and delamination. Modern industries prefer a material having more likelihood to perform a required function with desire life span. The stochastic finite element method is performed to account the scatter in the random fields to determine the stochastic response and reliability of the structure. The probabilistic response of the CFRP structure is determined using Gaussian process response surface method to investigate the probability of failure or reliability of composite structures.