![]() ![]() Employing the MgO board as a cladding material, makes the CSIP retain the functionality of a traditional SIP and eliminates its main disadvantages. ![]() The main subject of the current research is a CSIP with magnesium oxide board (MgO board) facings and an expanded polystyrene (EPS) core (Fig. Composite structural insulated panel (CSIP) employs composite material facings, which additionally results in higher strength and stiffness, making it useful in a broader range of civil structures. ![]() ![]() A developed version of SIP was proposed to overcome these disadvantages. However, the use of wood-based facings makes them prone to biological corrosion and fire. They are applied as structural parts of walls, floors, and roofs for a quick assembly of energy-efficient, “green” buildings resistant to deterioration even in extreme climate. SIPs are typically composed of a thick foam core and wood-based facings (e.g., oriented strand board), and distinguish themselves by the threefold role they play in a structure: (1) enveloping functionality, (2) thermal insulation, (3) transfer of structural loads. Structural insulated panel (SIP) is a type of sandwich structure designed for use in single- and two-story buildings. It can be tailored, through the use of different geometric proportions and various combinations of facing and core materials, to acquire properties required for a particular purpose. An essential advantage of the sandwich concept is its versatility. The general idea of a sandwich structure is to combine two thin high-strength facings and a light structural core, to create a panel of considerable strength and stiffness. Some notable examples of sandwich structure applications in civil engineering can be found in the housing industry and footbridges. The low weight makes even large modular elements easy to handle, significantly improving the speed of transport and assembly. Sandwich structures are becoming increasingly popular in civil engineering applications, as their use allows for a reduction of dead weight, improvement of sustainability, and overall cost-efficiency. The model was validated by confronting computational results with experimental results for natural scale panels a good correlation between the two results proved that the proposed model could effectively support the CSIP design process. Material model parameters describing the nonlinear range were identified in a joint analysis of laboratory tests and their numerical simulations performed on CSIP beams of three different lengths subjected to three- and four-point bending. An original custom code procedure was developed, which allowed to include material bimodularity to significantly improve the accuracy of computational results and failure mode predictions. An advanced nonlinear FE model was created in the ABAQUS environment, able to simulate the CSIP’s flexural behavior in great detail. The current report is devoted to the flexural analysis of a composite structural insulated panel (CSIP) with magnesium oxide board facings and expanded polystyrene (EPS) core, that was recently introduced to the building industry. ![]()
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