4/10/2023 0 Comments Consequent boundary example![]() By the Structural Mechanics Module, a uniaxial compression test was simulated to reproduce the load conditions reported in ASTMC 67-03a standard. The numerical simulation was performed using the commercial finite element software COMSOL Multiphysics v5.4. Referring to Munoz Guzman et al.’s research work, a honeycomb design would result in a relevant improvement in mechanical strength and thermo-acoustic damping compared to conventional cavities. Three types of brick designs were tested and compared with a reference component (unperforated brick): Two conventional geometries (round and square holes) and one unconventional inner structure (hexagonal holes). As a preliminary research stage, the effect of different inner morphologies on the mechanical performances was evaluated. In this regard, the proposal is to exploit the design flexibility, related to AM processes, to develop a rubber-cement brick with an engineering functional design. This study is an advanced approach to enhance the properties of building materials and to investigate their possible technological applicability. To complete the discussion on the printable rubber-cement compounds, FEM-based mechanical analysis is presented. In this case, the aim of structural modeling is to select the shape of the inner holes that maximizes the mechanical performance of the component, also improving its lightness and thermo-acoustic efficiency. Thanks to the progress of the technical drawing and FEM (Finite Element Method) analysis software, it will be possible to perform rigorous studies on the physical–mechanical behavior offered by different morphology design. As highlighted by several research works, the type of perforated structure of brick can significantly influence its structural, thermal, and acoustic efficiency. ![]() This means studying and testing functional shapes and geometries to be scaled in the manufacturing of rubber-cement bricks or building components. The main topic of this work is to combine the skills of materials engineering with the possibilities offered by the architectural design in order to maximize the physical–mechanical behavior through topological optimization approach. The mechanical weakness of the rubber-cement mixtures is the starting point of this research work. ![]() The modeling work aims to highlight how the topology optimization allows maximizing of the physical-mechanical performances of a standard rubber-cement component for building-architectural applications. After an overview on the performances of 3D printable rubber-cement mixtures developed in our research laboratory, a preliminary experimental Finite Element Method (FEM) analysis will be described. In this context, the development of innovative manufacturing technologies and the use of multi-physics simulation software represent useful approaches for the study of shapes and geometries designed to maximize the technological properties of the material. This aspect is crucial for the use of the material in building applications, where proper structural integrity must be guaranteed. Whereas an increase in the rubber content in the cement mix will negatively affect the mechanical properties of the material as a decrease in its compression strength. However, the abovementioned performances are affected by type, size, and content of polymer particles used in the cement-based mixtures production. Rubber-modified cement materials show interesting engineering and architectural properties due to the physical-chemical nature of the tire rubber aggregates. This strategy shows a dual functionality: Economic–environmental benefits and technological functionalization of the building material. Over the past few years, several researchers have worked on incorporating shredded/powdered rubber tires into cement-based material. ![]() Hence, tires end up thrown in seas and lands as well as being burnt, harming the living beings, and are therefore considered a very dangerous pollution source for the environment. Generally, in most countries, there are no strict regulations regarding tire disposal. ![]()
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