Compression studies of multi-layered composite materials for the purpose of verifying composite panels model used in the renovation process of the freight wagon’s hull

The paper presents the procedure sequence for modelling multilayer composite materials using PLM Siemens NX software. Virtual studies were referring to three-point and four-point flexural test of composite material samples. Composite materials containing fiber reinforced epoxy resin composites were considered. Within the carried out research, a virtual experiment to test composite samples composed of 5, 7 and 10 layers was conducted. Then the virtual model was matched to the results obtained during the stationary tests. As a result of matching the composite material model to the real model, correct results of the virtual bending experiment of composite samples were obtained. The presented procedure sequence for modelling composite material was used to analyse the MES of the scaled side of the freight wagon. The modification consisted in the use of composite panels as reinforcing elements of the wagon’s hull from inside to extend its life. The presented modelling approach enabled the initial strength verification of the modified side of the freight wagon’s hull.