Evaluation of manufacturing deviations of composite materials

Manufacturing induced imperfections in composites lead to a reduction the performance of structure. In order carry out repairs only when they are really necessary, evaluation capabilities determine strength required. Two methods presented: finite element based and Peridynamic approach, respectively. The process is used evaluate stiffness reduction. This processes currently doesn't include progressive failure analysis. Hence, peridynamics serves among other things verify prediction by model. Because, correspondence formulation used, integral Cauchy stresses obtained for laminate can be verified. Progressive analysis then whether first ply approach model accurate enough ensure values.