Simple approach to estimate residual flexural strength distribution of composite sandwich structure with impact-induced damage

초록

A new approach was developed to predict the statistical distribution of residual flexural strength of composite structures subjected to low velocity impact. Based on the assumption that the flexural strength of unimpacted structures follows the two-parameter Weibull distribution, the model was formulated as a function of the Weibull parameters for strength of unimpacted structures and residual strength of impacted structures. The model was verified by using an experiment for honeycomb core sandwich structure. The experiments included impact and flexural tests to generate the residual strength of structure. Theoretical predictions on the statistical distribution were in conformance with the experiments. The effect of impact energy on the distribution of residual flexural strength was also examined. (C) 2013 AIP Publishing LLC.

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