Fem

In this book, design and analyses of honeycomb sandwich structures are investigated. Primary goal is to develop an equivalent orthotropic material model that is a good substitute for the actual honeycomb sandwich structure. By replacing the actual honeycomb structure with the orthotropic model, during the finite element analyses, substantial advantages can be obtained with regard to ease of modeling and model modification, solution time and hardware resources. To figure out the best equivalent model among the approximate analytical models that can be found in the literature, a comparison is made. First sandwich beams with different honeycomb and deck plate materials are modeled in detail. Then a set of equivalent models with the same dimensions is generated. The material properties of the equivalent models are taken from different studies performed in the literature. Every model is analyzed under the same loading and the boundary conditions.