Evaluation of cracks in corrugated board, Evaluating cracks using Finite Element Method and J-integral

Abstract: This report investigates whether a FEM model can be used to assess the risk of crack growth in corrugated board. A set of box geometries with cracks at different locations were loaded and then compared using the evaluated J-integral within the FEM software. To validate the results, comparisons have been made between the FEM liner material and real liner material. It is described how the material model that is used in FEM is constructed as well as how the simulated box is built. The box is loaded in two load cases, and a simplification by using a linear elastic material model has been made. The answer seems positive that it may be possible to assess cracks in a corrugated box using FEM, but the model developed in this report needs further testing and improvements.