Abstract
In the work is presented the investigation of influence of fiber arrangement of a laminate on the values of stresses in the composite panel of a modified freight wagon using the FEM method. The conducted investigations concerned the reduced part of a side panel of a freight wagon. On this panel were mounted the tested composite panels. For this purpose, a special screw connection with a blind rivet nut was used. The first stage of works included manufacturing of a composite material consisting of four layers of a laminate. Each layer of the laminate is a composition of epoxy resin and carbon fibers with a plain weave in which fibers strands are woven at the angle of 90°. In the next step it was changed the main angle of placement of fibers in all layers of the laminate. Wherein, all layers of the laminate were characterized with the same angle of fibers with respect to the global coordinate system used in the numerical test. As a result of the study it was observed the relationship between the main angle of fibers of the composite material and the values of stresses occurring in the composite plate.
Highlights
In recent years it is observed a dynamic growth in the use of composite materials in various technical fields
This paper presents studies on the application of the composite material which is a composition of epoxy resin and carbon fiber fabric
Each layer of the composite material was a composition of the epoxy resin and carbon fiber with a plain weave, in which the fibers are woven at the angle of 900
Summary
In recent years it is observed a dynamic growth in the use of composite materials in various technical fields. The increased interest in composite materials implies the creation of tools that could be used, already in virtual testing phase, to verify the application of composite structures in the analyzed field of problems. The main problem in this case is the phenomenon of decreasing in the thickness of the shell plate of the wagon body as a result of its abrasion This attrition is of a stochastic nature. The matched model of the side wall of the wagon was the base for numerical analysis, using the FEM method, of the modernized freight wagon In this case, to the FEM model was added the plates of composite material and it was analyzed values of stresses and displacements in relation both to the entire side wall and the composite panels themselves
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