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In this tutorial, the Simulation RC slab with PET foam core under a four-point bending test in Abaqus has been investigated. The concrete and PET foam are modeled as three-dimensional solid parts. The steel reinforcements are modeled as wire parts. You can see a figure of the assembled parts below
The appropriate choice of material model, being suitable for the description of stress-strain relation in a foam is important. However, various foams have extremely different properties, thus the task is not so simple and each type of foam needs to be carefully analyzed. Usually, experimental identification of the material properties of the foam is done. Procedures exist, according for example to ISO 0r ASTM standards, that enable the determination of elastic and strength properties of the core, which are valid for PET foams as well. What is more, technical data sheets are provided for foams that are available on the market, which include information on the most important material properties declared by producers and identified according to the aforementioned standards. In such a case it seems that the description of material behavior should be easier. Nevertheless, the standards give recommendations that can be helpful only when the elastic response of the core is considered. What is more, the fact that the foam can be generally anisotropic is not commented on. For these reasons, some difficulties can be encountered when detailed analyses of sandwich response are done and identification of the foam core materials properties according to standards seem to be insufficient in such a situation
Both dynamic and static are selected to demonstrate the bending load. Proper interactions and constraints are assigned to all parts. The mesh should be fine to obtain the correct results
After the simulation, all results such as stress, strain, tension and compression damage, PET deformation, force-displacement diagram, and others are available. You can see some figures of the results below
